Technical data sheet · ThinkEdge rugged edge · 2U short-depth, single-socket

Lenovo ThinkEdge SE455 V3Specifications, configurations & comparisons

The ThinkEdge SE455 V3 is Lenovo’s single-socket AMD EPYC 8004 edge server: 2U high but only 440 mm deep, fed from AC or −48 V DC, with every port and supply at the front and a limited configuration rated to 55 °C. This page maps which parts stay supported at each temperature step, its GPU and drive rules, and the fixed SE455i V3 inference build.

Edge1 socketAMD EPYC 8004XClarity Controller 2

440mmchassis depth438 mm behind the rack flange

55°Cextended operating limitlimited configurations only

64cores from one EPYC 80048534P (200 W) or NEBS 8534PN (175 W)

768GBDDR5 ceiling6 × 128 GB, one DIMM per channel

82.5" SSD bays4 front hot-swap + 4 internal

6single-wide GPUsor 2 double-wide NVIDIA L40S

Configure an SE455 V3 →Get a UK quote

Every figure checked against the Lenovo ThinkEdge SE455 V3 and SE455i V3 Servers Product Guide (August 25, 2026)

Image: Lenovo

Form factor: Edge · 1 socket
Processors: AMD EPYC 8004
Memory: 6 × DDR5 RDIMM · up to 768 GB
Drive bays: Up to 8 · 4 backplane options
Expansion: 6 × PCIe · 1 × OCP 3.0
GPUs: Up to 6 · 3 listed
Boot: M.2 · 2 boot options
Management: XClarity Controller 2

01 — Overview

The SE455 V3 at a glance

Our read of Lenovo’s documentation: where the SE455 V3 is strong, and the limits worth knowing before you spec one.

Strengths

At 440 mm deep, with rail kits for two-post, 600 mm and 1000 mm racks, it is shorter than a conventional rack server and built for tight spaces.
Every external connection and hot-swap part — six full-height PCIe slots, the OCP slot, management and USB ports, the four hot-swap drives and both supplies — is at the front.
A limited configuration runs from 5 °C to 55 °C, NEBS Level 3 configurations are built on the PN processors, and a −48 V DC supply sits alongside the AC options.
Accelerator capacity is six single-wide NVIDIA L4 GPUs or AMD Alveo V70 cards, or two double-wide L40S, and the SE455i V3 is available as a fixed factory inference build.
Tamper detection with System Lockdown, an intrusion switch, a lockable cover and bezel, and security EIA brackets protect a server installed outside a secure data centre.

Watch-outs

Lenovo’s guide is inconsistent on SAS: its drive-bay rules say SAS drives are currently not supported, yet it lists 24 Gb SAS SSDs, quotes a SAS capacity and gives SAS temperature limits. Confirm SAS status with Lenovo before ordering; no hard disks are listed.
Memory stops at six DIMM slots and 768 GB at 4800 MHz, and the 96 GB and 128 GB DIMMs drop out of support above 45 °C.
The internal drive cage is not hot-swap: the server does not support in-rack servicing, so reaching those drives means shutting it down and taking it out of the rack.
Double-wide L40S GPUs force the 1U heatsink, a processor of 130 W or less, 40 °C maximum ambient and no acoustic mode, and may need 1800 W supplies.
Processors and heatsinks are factory-fitted with no field upgrade path, and XCC2 Platinum power capping is not supported.

Processors12 SKUs

Cores / CPU8–64

DIMM slots6

Backplanes4

Max bays8

GPUsup to 6

PSU options4 · to 1,800 W

02 — Processors

12 supported processors, mapped

The SE455 V3 takes one AMD EPYC 8004 “Siena” processor, a Zen 4c family with six memory channels. Lenovo lists twelve: six standard P models and six enhanced-efficiency PN models that are NEBS Level 3 compliant, from 8 to 64 cores and 80 W to 200 W. All are installed at the factory, with no processor field upgrades.

Processor landscape — cores × TDP

12 SKUs · 1 family

AMD EPYC 8004 12Bubble size = L3 cache · hover a bubble for the full SKU

Processor explorer

filter · sort · compare

Sort

Processor	Cores / threads	Base	L3 cache	TDP	W / core	Memory
AMD EPYC 8534P	64 / 128	2.3 GHz	128 MB	200 W	3.1	DDR5-4800
AMD EPYC 8534PN	64 / 128	2 GHz	128 MB	175 W	2.7	DDR5-4800
AMD EPYC 8434P	48 / 96	2.5 GHz	128 MB	200 W	4.2	DDR5-4800
AMD EPYC 8434PN	48 / 96	2 GHz	128 MB	155 W	3.2	DDR5-4800
AMD EPYC 8324P	32 / 64	2.65 GHz	128 MB	180 W	5.6	DDR5-4800
AMD EPYC 8324PN	32 / 64	2.05 GHz	128 MB	130 W	4.1	DDR5-4800
AMD EPYC 8224P	24 / 48	2.55 GHz	64 MB	160 W	6.7	DDR5-4800
AMD EPYC 8224PN	24 / 48	2 GHz	64 MB	120 W	5.0	DDR5-4800
AMD EPYC 8124P	16 / 32	2.45 GHz	64 MB	125 W	7.8	DDR5-4800
AMD EPYC 8124PN	16 / 32	2 GHz	64 MB	100 W	6.3	DDR5-4800
AMD EPYC 8024P	8 / 16	2.4 GHz	32 MB	90 W	11.3	DDR5-4800
AMD EPYC 8024PN	8 / 16	2.05 GHz	32 MB	80 W	10.0	DDR5-4800

Lenovo’s summary tables quote TDP ratings of up to 225 W, but the highest TDP in its processor list is 200 W, for the 8434P and 8534P.
Above 45 °C the standard P processors with 24 or more cores drop out, and at 55 °C the 16-core 8124P goes too, leaving the 8024P and the PN parts; at 55 °C the 48- and 64-core PN parts also require Riser 2 to be absent.
The 2U heatsink is the default, and Lenovo recommends it to maximise heat dissipation and keep fan noise down. The 1U heatsink is needed for full-length adapters and limits the processor to 130 W and ambient to 45 °C.
Every listed EPYC 8004 has six DDR5 channels at 4800 MHz and presents 96 PCIe lanes, a mix of Gen4 and Gen5.
In acoustic modes Lenovo recommends only lower-power parts with the 2U heatsink: in Mode 1 the 8024P, 8124P and PN models up to 32 cores, and in Mode 2 the 8024P, 8024PN and 8124PN.

03 — Memory

6 DDR5 DIMM slots

Six DDR5 slots, one per channel, run at up to 4800 MHz. Lenovo supports 1, 2, 4 or 6 DIMMs and recommends six identical modules; with 128 GB DIMMs the ceiling is 768 GB.

Capacity with every slot filled

by DIMM size

Rated memory speed

from the processor table

Processor family	Up to
AMD EPYC 8004	4800 MT/s

Five RDIMMs are listed: 16 GB and 32 GB x8, 64 GB and 96 GB 10x4, and a 128 GB module rated 5600 MHz that runs at 4800 MHz.
DRAM densities (16, 24 and 32 Gb) cannot be combined, nor can x4 and x8 modules, though different capacities or rank counts may share the server when fitted in Lenovo’s order, larger and higher-rank modules first.
Temperature trims the list: 96 GB and 128 GB DIMMs are unsupported at 50 °C, and at 55 °C only the 16 GB and 32 GB modules remain.
Protection includes ECC and Advanced Memory Device Correction (x4 DIMMs); memory mirroring and rank sparing are not supported.

04 — Storage

4 backplane options, up to 8 bays

Drives are split between four hot-swap 2.5-inch bays at the front and an optional cage of four more inside, which tilts up for access but is not hot-swap. Each group takes SATA or NVMe SSDs through its own backplane, and the headline layouts below draw the front and internal bays together.

Headline layouts

front panel view

Front panel

Config E: both backplanes on onboard NVMe ports, each drive on a PCIe Gen4 x4 link without oversubscription. PCIe slots 6 and 8 on Riser 2 lose their connection in this layout; slot 7 stays usable.

SAS/SATANVMeSAS/SATA + NVMe

Controllers & boot

Onboard SATA ports - up to 8 drives, JBOD only — HBA. onboard, no RAID
Onboard NVMe ports (BC4V) - up to 8 drives PCIe 4.0 x4, JBOD only — HBA. onboard, no RAID
ThinkSystem 440-8i SAS/SATA PCIe Gen4 12Gb HBA — HBA. slots 4,5,7,8; half-length; max 1
ThinkSystem RAID 540-8i PCIe Gen4 12Gb Adapter — RAID. slots 4,5,7,8; max 1
ThinkSystem RAID 940-8i 4GB Flash PCIe Gen4 12Gb Adapter — RAID, 4GB cache. slots 4,5,7,8; supercap cable kit 4X97A88849; max 1
ThinkSystem M.2 SATA/x4 NVMe 2-Bay Adapter (BVUY) - NVMe via onboard port; SATA only with RAID 5350-8i; RAID via separate adapter (5350-8i SATA / 540-8i NVMe) — boot
ThinkSystem M.2 RAID B540i-2i SATA/NVMe Adapter (BZPA) - integrated Broadcom RAID 0/1 — boot

Only one SATA controller is allowed, and it serves front and internal SATA bays alike: the onboard ports (up to eight drives) or a single 440-8i HBA, RAID 540-8i or RAID 940-8i in slot 4, 5, 7 or 8.
On SAS the guide gives two readings. Its front and internal drive-bay rules say SAS drives are currently not supported and would need a RAID adapter or SAS HBA once they are. Elsewhere it lists 24 Gb SAS SSDs from 800 GB to 30.72 TB, quotes 245.76 TB with eight 30.72 TB SAS SSDs and includes SAS drives in its temperature table. The layouts on this page use SATA and NVMe, which both readings support.
Lenovo’s NVMe headline is 737.28 TB with four 122.88 TB plus four 61.44 TB drives. Its drive table caps both of those models at four per server, so the 491.52 TB it also quotes for eight 61.44 TB drives does not match the table.
Up to two M.2 boot drives sit on a vertical adapter: the M.2 RAID B540i-2i with built-in RAID 0 or 1, or the 2-bay SATA/x4 NVMe adapter, whose NVMe drives use an onboard port and whose SATA drives need a RAID 5350-8i that is not in the server’s storage adapter table.
Heat limits bite hardest inside the chassis: internal SATA drives are unsupported at 50 °C and above and internal NVMe drives are limited to named models from 40 °C, while front SATA drives stay supported all the way to 55 °C.

Every documented backplane

4 with drive bays

2.5-inch3.5-inchEDSFF (E1.S / E3.S)

05 — Accelerators & I/O

GPUs, PCIe and networking

Lenovo supports up to six single-wide accelerators — the NVIDIA L4 24 GB or the AMD Alveo V70, both half-length cards that fit any slot — or two double-wide NVIDIA L40S 48 GB cards in slots 3 and 7. Installed GPUs must be identical. The L40S is not supported above 40 °C, and at 50 °C and 55 °C the L4 is the only GPU or accelerator from the option tables still supported, with possible throttling under heavy load. 6 × NVIDIA L4 24 GB or AMD Alveo V70 (single-wide, any slot) · or 2 × NVIDIA L40S 48 GB (double-wide, slots 3 and 7)

NVIDIA L4 24GB PCIe Gen4 Passive GPU

single-wide

24GB · up to 6

NVIDIA L40S 48GB PCIe Gen4 Passive GPU

double-wide

48GB · up to 2 (slots 3, 7)

AMD Alveo V70 Datacenter Accelerator Adapter

single-wide

up to 6

I/O topology

96 lanes per CPU

The EPYC 8004 presents 96 PCIe lanes, a mix of Gen4 and Gen5, as up to six full-height slots on two risers, an OCP 3.0 slot and the NVMe bays. Every slot is physically x16 and opens at the front; Riser 1 is standard, and Riser 2 is optional and can be added later.

Network adapters Lenovo lists

26 options

Adapter	Ports	Form
ThinkSystem Broadcom 5719 1GbE RJ45 4-port OCP Ethernet Adapter	4 × 1GbE	OCP 3.0
ThinkSystem Intel I350 1GbE RJ45 4-port OCP Ethernet Adapter	4 × 1GbE	OCP 3.0
ThinkSystem Intel I350 1GbE RJ45 4-Port OCP Ethernet Adapter V2	4 × 1GbE	OCP 3.0
ThinkSystem Broadcom 57416 10GBASE-T 2-port OCP Ethernet Adapter	2 × 10GbE	OCP 3.0
ThinkSystem Intel X710-T2L 10GBASE-T 2-port OCP Ethernet Adapter	2 × 10GbE	OCP 3.0
ThinkSystem Intel X710-T4L 10GBase-T 4-Port OCP Ethernet Adapter	4 × 10GbE	OCP 3.0
ThinkSystem Broadcom 57412 10GBase-T 4-Port OCP Ethernet Adapter	4 × 10GbE	OCP 3.0
ThinkSystem Broadcom 57414 10/25GbE SFP28 2-Port OCP Ethernet Adapter	2 × 25GbE	OCP 3.0
ThinkSystem Broadcom 57504 10/25GbE SFP28 4-Port OCP Ethernet Adapter	4 × 25GbE	OCP 3.0
ThinkSystem Intel E810-DA2 10/25GbE SFP28 2-Port OCP Ethernet Adapter	2 × 25GbE	OCP 3.0
ThinkSystem Intel E810-DA4 10/25GbE SFP28 4-Port OCP Ethernet Adapter	4 × 25GbE	OCP 3.0
ThinkSystem Mellanox ConnectX-6 Lx 10/25GbE SFP28 2-port OCP Ethernet Adapter	2 × 25GbE	OCP 3.0
ThinkSystem Broadcom 57508 100GbE QSFP56 2-Port OCP Ethernet Adapter	2 × 100GbE	OCP 3.0
ThinkSystem Broadcom 5719 1GbE RJ45 4-Port PCIe Ethernet Adapter	4 × 1GbE	PCIe
ThinkSystem I350-T4 PCIe 1Gb 4-Port RJ45 Ethernet Adapter	4 × 1GbE	PCIe
ThinkSystem Broadcom 57416 10GBASE-T 2-Port PCIe Ethernet Adapter	2 × 10GbE	PCIe
ThinkSystem Intel X710-T2L 10GBase-T 2-Port PCIe Ethernet Adapter	2 × 10GbE	PCIe
ThinkSystem Intel X710-T4L 10GBase-T 4-Port PCIe Ethernet Adapter	4 × 10GbE	PCIe
ThinkSystem Broadcom 57414 10/25GbE SFP28 2-port PCIe Ethernet Adapter	2 × 25GbE	PCIe
ThinkSystem Broadcom 57504 10/25GbE SFP28 4-port PCIe Ethernet Adapter	4 × 25GbE	PCIe
ThinkSystem Intel E810-DA2 10/25GbE SFP28 2-Port PCIe Ethernet Adapter	2 × 25GbE	PCIe
ThinkSystem Intel E810-DA4 10/25GbE SFP28 4-Port PCIe Ethernet Adapter	4 × 25GbE	PCIe
ThinkSystem Mellanox ConnectX-6 Lx 10/25GbE SFP28 2-port PCIe Ethernet Adapter	2 × 25GbE	PCIe
ThinkSystem Broadcom 57508 100GbE QSFP56 2-Port PCIe 4 Ethernet Adapter	2 × 100GbE	PCIe
ThinkSystem Mellanox ConnectX-6 Dx 100GbE QSFP56 2-port PCIe Ethernet Adapter	2 × 100GbE	PCIe
ThinkSystem NVIDIA ConnectX-7 NDR200/200GbE QSFP112 2-port PCIe Gen5 x16 InfiniBand Adapter	2 × 200GbE/NDR200	PCIe

Slots are half-length by default. Full-length cards fit only the upper two slots of each riser (3 and 4, 6 and 7), and only with the 1U heatsink.
One double-wide GPU goes in slot 7 with slot 6 left empty; two go in slots 3 and 7, with slots 4 and 6 left empty.
A COM-port bracket in slot 5 adds an RS-232 serial port.
OCP adapters run from 1 to 100 GbE, PCIe NICs reach the ConnectX-7 NDR200/200GbE, and every PCIe NIC in the table is supported up to six per server; Fibre Channel comes from QLogic QLE2770 and QLE2772 32 Gb HBAs.
Front ports: two USB 3.1 Type-A, one USB-C with video (a USB-C-to-VGA cable is included), a USB 2.0 port for XCC local management, the RJ45 management port, an external diagnostics port and an NMI pinhole. Dust covers for the ports are standard.
Factory orders can include at most four cables, or two with the security bezel, because of space in the packaging.

06 — Power & cooling

4 power supplies, 1,100–1,800 W

One or two hot-swap supplies mount at the front with fans that turn the opposite way to other ThinkSystem supplies, which are therefore not supported. Options are 1100 W Titanium, 1100 W and 1800 W Platinum and an 1100 W −48 V DC unit, and a pair must be identical.

AC−48 V DC

The 1100 W Platinum supply is the one named for both 230 V and 115 V input. On 100–127 V an 1100 W supply draws up to 12 A and needs a power cable rated above 10 A; the 1800 W unit does not support low-range input.
On 200–240 V the 1100 W units draw 6.0 A and the 1800 W unit 10 A; in China, 240 V DC input is supported.
The DC supply takes −44 to −54 V DC at 26 A inlet current.
Builds with L40S GPUs may need the 1800 W supplies; Lenovo points to its Capacity Planner for sizing other configurations.
Five 60 mm dual-rotor simple-swap fans give N+1 rotor redundancy.
Two grounding points on the front take Lenovo’s 6 AWG grounding cable, sold only as a field upgrade.

07 — Management, security & OS

Run it, secure it, choose the OS

Management

XClarity Controller 2 (XCC2) on an ASPEED AST2600 BMC
Dedicated front RJ45 management port · NC-SI on OCP port 1
XCC2 Platinum upgrade: remote console, virtual media, System Guard, Enterprise Strict Security (CNSA 1.0), Neighbor Group
ThinkShield Edge Mobile Management and XClarity Mobile apps over the front USB management port
XClarity Administrator, XClarity Provisioning Manager (F1), XClarity Essentials, XClarity Energy Manager
External Diagnostics Handset port (handset sold as a field upgrade)
MicroSD slot for XCC2 storage (Remote Disc on Card up to 4 GB)
IPMI 2.0, SNMPv3, Redfish, CIM-XML and an HTML5 web interface
XCC-scheduled monthly check of dust-filter airflow

Security

Tamper detection with System Lockdown Mode, managed through ThinkShield Key Vault Portal or XCC2
Intrusion switch (standard) · lockable top cover · optional locking bezel with dust filter
Security EIA brackets with keyed screws
Root of Trust module with PFR (NIST SP 800-193) and TPM 2.0
Self-encrypting drives, optionally enabled at the factory (cannot be disabled once enabled)
AMD Infinity Guard: Secure Memory Encryption, SEV, Secure Nested Paging, Secure Boot, Shadow Stack
UEFI Secure Boot (permanent once enabled) · NIST SP 800-147B compliant

Operating systems

Microsoft Windows Server 2019, 2022 and 2025
Red Hat Enterprise Linux 8, 9 and 10
SUSE Linux Enterprise Server 15 and 16
Ubuntu 20.04, 22.04, 24.04 and 26.04 LTS
VMware ESXi 7.0 U3 to 9.1 · factory preload, not with NVIDIA GPUs · vSAN ESA supported
Base hardware of the ThinkAgile MX455 V3 Edge Premier (Azure Local)

08 — Compare

How the SE455 V3 compares with its family

The SE100, a one-third-width 1U node with an Intel Core Ultra processor, is a smaller ThinkEdge option. The SE455 V3 shares its single-socket AMD layout with the ThinkSystem SR635 V3 and SR655 V3 rack servers, which use EPYC 9004 and 9005 instead of 8004, and the matrix adds the SD535 V3 sled; each bar comes from that server’s verified spec file.

This modelSiblings and successorEach value from that model’s own verified spec file · bars scale per column

Head-to-head comparisons

Every figure on this page, set against the machines buyers weigh it up with.

vs XR5610 vs DL110 Gen12 vs DL145 Gen11

SE100 data sheet SR635 V3 data sheet SR655 V3 data sheet SD535 V3 data sheet Dell PowerEdge XR5610 data sheet Dell PowerEdge XR7620 data sheet Dell PowerEdge XR8720t data sheet HPE Compute Edge Server e930t data sheet

09 — Use cases

Four builds that suit the SE455 V3

Four example specifications built only from the options our configurator offers for the SE455 V3. Edge sites vary, so we check each one against Lenovo’s ambient-temperature, acoustic and slot tables for the actual location before quoting.

Branch & retail

Short-depth virtualisation host

A 32-core EPYC 8324P with six 64 GB DIMMs gives a 384 GB hypervisor host that fits a 600 mm cabinet. Four front NVMe drives form the datastore on onboard ports — Lenovo lists vSAN ESA support — and two M.2 drives on the B540i-2i adapter mirror the boot volume.

1 × AMD EPYC 8324P — 32 cores @ 2.65 GHz, 180 W
6 × 64 GB TruDDR5 4800 MHz — 384 GB
4 × 3.84 TB NVMe in the front hot-swap bays
2 × 480 GB M.2 on the M.2 RAID B540i-2i (RAID 1)
Intel E810-DA4 4 × 25GbE OCP 3.0
2 × 1100 W Titanium
VMware ESXi 8.0

The 600 mm ball-bearing rail kit suits four-post racks with 400–500 mm between front and rear flanges; two-post and 1000 mm racks need their own rail kits.

Open this build in the configurator →

Hot and DC-powered sites

55 °C −48 V DC build

For a cabinet that can reach 55 °C, the build follows the 55 °C column of Lenovo’s temperature table: a NEBS-compliant EPYC 8534PN, 32 GB DIMMs, front SATA SSDs and an OCP card that stays supported at that temperature, all on the −48 V DC supply.

1 × AMD EPYC 8534PN — 64 cores @ 2 GHz, 175 W
6 × 32 GB TruDDR5 4800 MHz — 192 GB
4 × 960 GB SATA SSD in the front bays, onboard SATA
Intel E810-DA4 4 × 25GbE OCP 3.0
2 × 1100 W −48 V DC
Red Hat Enterprise Linux 9

At 55 °C the 8534PN is supported only without Riser 2, so this build stays on Riser 1; M.2 drives and internal SATA drives are unsupported at that temperature and only a few named NVMe models are allowed inside, so this build has no internal cage and boots from the front SSDs. The 55 °C range applies to limited configurations only, and we confirm the exact build with Lenovo.

Open this build in the configurator →

Edge AI

Dual L40S inference server

Two double-wide NVIDIA L40S 48 GB cards, the maximum, sit in slots 3 and 7 for larger vision or language models at the edge. Their rules shape the rest of the build: a processor of 130 W or less, here the 32-core EPYC 8324PN, the 1U heatsink and no acoustic mode, with 1800 W supplies because Lenovo says the L40S may need them.

1 × AMD EPYC 8324PN — 32 cores @ 2.05 GHz, 130 W
2 × NVIDIA L40S 48 GB, double-wide, slots 3 and 7
6 × 64 GB TruDDR5 4800 MHz — 384 GB
4 × 7.68 TB NVMe in the front bays
2 × 480 GB M.2 on the M.2 RAID B540i-2i
Intel E810-DA2 2 × 25GbE OCP 3.0
2 × 1800 W Platinum
Ubuntu 24.04 LTS

The L40S is supported only up to 40 °C ambient, and with two fitted, slots 4 and 6 must stay empty. Lenovo says the L40S may need 1800 W supplies depending on configuration, and the 1800 W unit needs 200–240 V input.

Open this build in the configurator →

AI inference

SE455i V3-style dual-L4 build

This follows the main components of Lenovo’s SE455i V3 Inference Model: a 64-core EPYC 8534P, six 96 GB DIMMs (576 GB), two NVIDIA L4 24 GB GPUs, one 3.84 TB NVMe drive, a 480 GB M.2 boot drive on the B540i-2i adapter, a Broadcom 57416 10GBASE-T OCP card and two 1800 W supplies. The factory version is ordered as feature CF16 with its major components fixed.

1 × AMD EPYC 8534P — 64 cores @ 2.3 GHz, 200 W
2 × NVIDIA L4 24 GB, single-wide
6 × 96 GB TruDDR5 4800 MHz — 576 GB
1 × 3.84 TB NVMe in a front bay
1 × 480 GB M.2 on the M.2 RAID B540i-2i
Broadcom 57416 2 × 10GBASE-T OCP 3.0
2 × 1800 W Platinum
Ubuntu 24.04 LTS

Lenovo’s SE455i V3 bill of materials sets a 5–40 °C operating range and includes XCC Platinum and a 600 mm rail kit. Built from separate parts, as here, the configuration is not locked, so drives and memory can be expanded later. Lenovo’s fixed build specifies a PCIe 5.0 PM9D3a SSD and a SATA M.2 drive; the drives here come from our configurator’s list and are different models.

Open this build in the configurator →

10 — Full specifications

Lenovo ThinkEdge SE455 V3 specifications

Chassis & mounting

Form factor	2U short-depth rack server, single socket
Machine type	7DBY (3-year warranty) · SE455i V3 = base 7DBYCTOAWW + feature CF16
Dimensions (W × H × D)	445 × 87 × 440 mm · 438 mm behind the rack flange · 481 mm across the EIA flanges
Weight and volume	19.21 kg · 17.5 litres
Rack options	2-post · 4-post 600 mm · 4-post 1000 mm (friction, ball-bearing and 2-post rail kits)
EIA brackets	Standard or security (keyed) · positions 1–6 at 12.5 mm steps plus Max, 112.5 mm range

Processor

Family	AMD EPYC 8004 (“Siena”, Zen 4c), one socket
Models	6 × P (8024P–8534P) · 6 × PN, NEBS Level 3 (8024PN–8534PN)
Cores and TDP	8–64 cores · 80–200 W
PCIe lanes	96, a mix of Gen5 and Gen4
Heatsink	2U (default) or 1U (for full-length adapters; ≤ 130 W, ≤ 45 °C)

Memory

Slots	6 DDR5 · 6 channels × 1 DIMM
DIMMs	16 and 32 GB x8 · 64 and 96 GB 10x4 · 128 GB (5600 MHz part)
Speed	4800 MHz
Maximum	768 GB (6 × 128 GB)
Protection	ECC, AMDC (x4), patrol/demand scrubbing, Post Package Repair · no mirroring or rank sparing

Storage

Front	4 × 2.5" hot-swap · SATA or PCIe Gen4 NVMe SSD
Internal	Optional 4 × 2.5" tilting cage, not hot-swap · SATA or NVMe
SAS and HDD	Guide conflicts: drive-bay rules say SAS is not yet supported; option and capacity tables list SAS SSDs · no HDDs listed
Boot	2 × M.2 (M.2 RAID B540i-2i, or 2-bay SATA/x4 NVMe adapter)
Controllers	Onboard SATA (8) and NVMe (8, PCIe 4.0 x4) · 440-8i HBA · RAID 540-8i or 940-8i
Maximum quoted	737.28 TB NVMe (4 × 122.88 + 4 × 61.44 TB) · 245.76 TB SAS · 61.44 TB SATA

Expansion & networking

PCIe slots	Up to 6 full-height, all physically x16: 2 × Gen5 x16, 4 × Gen4 x8
OCP	1 × OCP 3.0 SFF, PCIe 5.0 x16 (slot 9)
GPUs	6 × single-wide (L4, Alveo V70) or 2 × double-wide (L40S)
Serial	Optional COM port in slot 5

Power & cooling

Supplies	1 or 2 hot-swap, front-mounted, identical
Options	1100 W Titanium · 1100 W and 1800 W Platinum · 1100 W −48 V DC
Fans	5 × 60 mm dual-rotor simple-swap, N+1 rotor
Acoustic modes	Mode 1: 45 dBA at 25 °C and below · Mode 2: 40 dBA at 25 °C and below

Ports & management

Front ports	2 × USB 3.1 Type-A · USB-C with video · USB 2.0 (XCC) · RJ45 management · diagnostics port · NMI
Video	16 MB in XCC2 · 1920 × 1200 at 60 Hz
Management	XClarity Controller 2 (AST2600) · optional XCC2 Platinum

Environment & warranty

ASHRAE	A2 in most configurations · A3 or A4 depending on configuration
Operating temperature	10–35 °C (A2) · 5–40 °C (A3) · 5–45 °C (A4) · 5–55 °C extended, limited configurations
NEBS Level 3	5–40 °C · short-term −5 to 55 °C · PN processors
Shock and vibration	1.31 Grms, 5–500 Hz · 25 G operating shock (mid-rack)
Dust	Port dust covers standard · MERV 2 filter in the optional bezel
Maximum altitude	3,050 m (5–45 °C)
Warranty	3 years · CRU and onsite, 9 × 5 next business day

11 — FAQ

SE455 V3 questions, answered from the documentation

How deep is the ThinkEdge SE455 V3?

440 mm, or 438 mm measured back from the rack flange, in a 2U chassis 445 mm wide. Lenovo offers rail kits for two-post racks, 600 mm four-post racks and 1000 mm four-post racks.

What temperatures can the SE455 V3 run at?

Most configurations meet ASHRAE A2 (10–35 °C), and others meet A3 (5–40 °C) or A4 (5–45 °C). Limited configurations run from 5 °C to 55 °C, with processors, memory, GPUs and drives progressively restricted in Lenovo’s temperature table.

Does the SE455 V3 support SAS drives?

Lenovo’s guide gives two readings. Its drive-bay rules say SAS drives are currently not supported and would need a RAID adapter or SAS HBA once they are, while other tables list 24 Gb SAS SSDs and quote 245.76 TB with eight 30.72 TB SAS drives. SATA and NVMe SSDs are supported in the front and internal bays under either reading, so confirm SAS with Lenovo before ordering; no hard disks are listed.

How many drives does the SE455 V3 hold?

Eight 2.5-inch SSDs: four hot-swap bays at the front and an optional cage of four internal bays that are not hot-swap. Two M.2 boot drives sit on a vertical adapter.

What is the maximum memory of the SE455 V3?

768 GB, using six 128 GB DIMMs in its six slots, one per channel, running at 4800 MHz. Above 45 °C ambient the 96 GB and 128 GB DIMMs are no longer supported.

Which processors does the SE455 V3 support?

One AMD EPYC 8004 from twelve models with 8 to 64 cores. The six PN models are NEBS Level 3 compliant enhanced-efficiency parts from 80 W to 175 W; the six standard P models run from 90 W to 200 W. Processors are installed at the factory only.

How many GPUs can the SE455 V3 take?

Up to six single-wide NVIDIA L4 GPUs or AMD Alveo V70 accelerators, or two double-wide NVIDIA L40S in slots 3 and 7. The L40S requires the 1U heatsink, a processor of 130 W or less and ambient no higher than 40 °C.

Can the SE455 V3 run on DC power?

Yes: Lenovo offers an 1100 W −48 V DC hot-swap supply that takes −44 to −54 V DC. Two supplies must be identical, so a redundant pair means two DC units.

What is the SE455i V3?

It is not separate hardware but a fixed SE455 V3 configuration for AI inference, ordered on the “for AI” base with feature CF16: an EPYC 8534P, 576 GB of memory, two NVIDIA L4 GPUs, one 3.84 TB NVMe drive, a 480 GB M.2 drive and two 1800 W supplies, with the major components locked.

Is the ThinkEdge SE455 V3 end of life?

Lenovo’s product guide sets no end-of-service date for the SE455 V3 and lists operating systems up to VMware ESXi 9.1 and Ubuntu 26.04. Cover for an installed server follows its warranty or service contract; our end-of-life checker records any announcement.

Sources & verification

Where these figures come from

Lenovo ThinkEdge SE455 V3 and SE455i V3 Servers Product Guide (August 25, 2026) — Key features, standard specifications (Table 2), CTO models and SE455i V3 bill of materials (Tables 3–5), slot and drive configurations (Tables 6–8), processor Tables 9–11, memory (Table 13), internal storage and M.2 (Tables 14–25), drive Tables 26–31, I/O expansion (Tables 32–35), network, FC, accelerators and GPUs (Tables 36–41), power supplies (Table 43), systems management, security and System Lockdown, rack installation (Tables 58–60), OS support, physical and electrical specifications, operating environment (Tables 64–67), NEBS, dust filter and warranty.

Specifications are extracted from Lenovo’s published documents and independently re-checked line by line. Configurations are quote-based; availability and exact options are confirmed at quotation. Last reviewed 2026-09-11.

Get a quote for the Lenovo ThinkEdge SE455 V3

Tell us the workload and we’ll spec and price it — or build it in the configurator first.

Business enquiries only — please use your company email. Gmail, Hotmail and other personal addresses are not accepted.

Delivery country (optional)

We only ship hardware to the countries in the dropdown. Software and maintenance services are global.

We use these details to reply to your enquiry and prepare any quote. No marketing emails without your consent. Privacy Policy

Enquiring about: Lenovo ThinkEdge SE455 V3

Full Name *

Email *

Company

Quantity Required

Additional Notes

Response within 4 business hours · No obligation

Quote for

Lenovo ThinkEdge SE455 V3

0800 987 4111

The SE455 V3 at a glance

Strengths

Watch-outs

12 supported processors, mapped

Processor landscape — cores × TDP

Processor explorer

6 DDR5 DIMM slots

Capacity with every slot filled

Rated memory speed

4 backplane options, up to 8 bays

Headline layouts

Controllers & boot

Every documented backplane

GPUs, PCIe and networking

NVIDIA L4 24GB PCIe Gen4 Passive GPU

NVIDIA L40S 48GB PCIe Gen4 Passive GPU

AMD Alveo V70 Datacenter Accelerator Adapter

I/O topology

Network adapters Lenovo lists

4 power supplies, 1,100–1,800 W

Run it, secure it, choose the OS

Management

Security

Operating systems

How the SE455 V3 compares with its family

Head-to-head comparisons

Four builds that suit the SE455 V3

Short-depth virtualisation host

55 °C −48 V DC build

Dual L40S inference server

SE455i V3-style dual-L4 build

Lenovo ThinkEdge SE455 V3 specifications

Chassis & mounting

Processor

Memory

Storage

Expansion & networking

Power & cooling

Ports & management

Environment & warranty

SE455 V3 questions, answered from the documentation

Where these figures come from

Buy & configure

Edge guides & family

Plan the site

Support & lifecycle

Get a quote for the Lenovo ThinkEdge SE455 V3

Talk to a UK specialist