The PowerEdge R6725 is Dell’s two-socket 1U server for 5th Gen AMD EPYC 9005, built for virtualisation, VDI and HPC. Below is the full envelope from Dell’s guide: 20 processors up to 192 cores and 500 W, 24 DIMMs running at up to 6400 MT/s, CXL memory, eight drive layouts, and the cooling limits that come with 500 W parts in one rack unit.
1U Rack2 socketsAMD EPYC 9005iDRAC10
384cores per server2 × EPYC 9965 · 192 each
6400MT/smemory speedone DIMM per channel, all 24 slots
1Left control panel: USB 2.0 Type-A and Mini DisplayPort (optional KVM)
2Ten 2.5-inch SAS/SATA bays in this layout
3Express service tag
4Right control panel: power button and USB 2.0 Type-C (host/BMC Direct)
Image: Dell Technologies
Form factor
1U Rack · 2 sockets
Processors
AMD EPYC 9005
Memory
24 × DDR5 RDIMM · up to 6 TB
Drive bays
Up to 22 · 8 drive-bay layouts
Expansion
3 × PCIe · 2 × OCP 3.0
GPUs
Up to 3 · 1 listed
Boot
BOSS-N1 DC-MHS
Management
iDRAC10
01 — Overview
The R6725 at a glance
Our read of Dell’s documentation: where the R6725 is strong, and the limits worth knowing before you spec one.
Strengths
+Two EPYC 9005 sockets in 1U, each up to 192 cores with the EPYC 9965 — 384 cores in a single rack unit.
+Each of the 24 DIMM slots has a channel to itself, so memory runs at up to 6400 MT/s with every slot populated.
+CXL 2.0 Type 3 memory expansion, documented as 24 × 96 GB plus two CXL add-in cards for 3,072 GB.
+Eight front layouts up to 20 E3.S Gen5 bays with two more at the rear, and up to two OCP 3.0 slots, the second taking the place of PCIe slot 2.
+Optional Direct Liquid Cooling, and fans in Standard, HPR Silver and HPR Platinum grades.
Watch-outs
!The 500 W EPYC 9965 and 9755 run on air only in some layouts and at no more than 30°C inlet; the 4 × 3.5-inch, 10 × 2.5-inch and 20 + 2 E3.S builds do not support processors above 400 W.
!No single-processor configuration is documented: every riser configuration lists two CPUs, and riser connectors 3 to 5 depend on the second one.
!No second DIMM per channel, so 24 slots are the hard ceiling, and 256 GB modules cannot go on a CXL card.
!ASHRAE A3 and A4 bring tight limits — no GPUs, no RDIMMs of 64 GB or more, processors capped at 240 W or 195 W — and only two of the seven layouts Dell tabulates are rated for A4.
!GPUs stop at three 75 W low-profile cards with the L4 as the only named model, and Dell flags its 1800 W supply as missing from the launch line-up.
Processors20 SKUs
Cores / CPU8–192
DIMM slots24
Drive layouts8
Max bays22
GPUsup to 3
PSU options8 · to 1,800 W
02 — Processors
20 supported processors, mapped
Twenty EPYC 9005 processors are listed, all for two-socket use: from the 8-core 9015 to the 192-core 9965, and from 125 W to 500 W. Unlike Dell’s single-socket R6715, the list has no P-suffix parts and adds the 9965, 9755, 9655, 9555 and 9355. The two 500 W chips face the tightest cooling conditions in the 1U chassis.
Processor landscape — cores × TDP
20 SKUs · 1 family
AMD EPYC 9005 20Bubble size = L3 cache · hover a bubble for the full SKU
Processor explorer
filter · sort · compare
Processor
Cores / threads
Base
L3 cache
TDP
W / core
Memory
AMD EPYC 9965
192 / 384
2.25 GHz
384 MB
500 W
2.6
DDR5-6400
AMD EPYC 9845
160 / 320
2.1 GHz
320 MB
390 W
2.4
DDR5-6400
AMD EPYC 9825
144 / 288
2.2 GHz
384 MB
390 W
2.7
DDR5-6400
AMD EPYC 9755
128 / 256
2.7 GHz
512 MB
500 W
3.9
DDR5-6400
AMD EPYC 9745
128 / 256
2.4 GHz
256 MB
400 W
3.1
DDR5-6400
AMD EPYC 9655
96 / 192
2.6 GHz
384 MB
400 W
4.2
DDR5-6400
AMD EPYC 9575F
64 / 128
3.3 GHz
256 MB
400 W
6.3
DDR5-6400
AMD EPYC 9555
64 / 128
3.2 GHz
256 MB
360 W
5.6
DDR5-6400
AMD EPYC 9535
64 / 128
2.4 GHz
256 MB
300 W
4.7
DDR5-6000
AMD EPYC 9475F
48 / 96
3.65 GHz
256 MB
400 W
8.3
DDR5-6400
AMD EPYC 9455
48 / 96
3.15 GHz
256 MB
300 W
6.3
DDR5-6000
AMD EPYC 9375F
32 / 64
3.8 GHz
256 MB
320 W
10.0
DDR5-6400
AMD EPYC 9355
32 / 64
3.55 GHz
256 MB
280 W
8.8
DDR5-6400
AMD EPYC 9335
32 / 64
3 GHz
128 MB
210 W
6.6
DDR5-6400
AMD EPYC 9275F
24 / 48
4.1 GHz
256 MB
320 W
13.3
DDR5-6400
AMD EPYC 9255
24 / 48
3.2 GHz
128 MB
200 W
8.3
DDR5-6400
AMD EPYC 9175F
16 / 32
4.2 GHz
512 MB
320 W
20.0
DDR5-6400
AMD EPYC 9135
16 / 32
3.65 GHz
64 MB
200 W
12.5
DDR5-6400
AMD EPYC 9115
16 / 32
2.6 GHz
64 MB
125 W
7.8
DDR5-6400
AMD EPYC 9015
8 / 16
3.6 GHz
64 MB
125 W
15.6
DDR5-6400
Dell’s thermal matrix gives a cTDP range next to each TDP: 120–155 W for the 9015 and 9115 (both 125 W), 200–240 W for the 9335 (210 W) and 450–500 W for the 500 W 9965.
Two 300 W parts, the 9535 and 9455, are missing from the thermal restriction matrix even though the processor table lists them.
All processors use the T-type heat sink, which Dell rates for every TDP.
The 9535 and 9455 list a 6000 MT/s memory speed; every other part lists 6400 MT/s.
Dell’s layout tables cap air-cooled inlet at 30°C above 300 W in the 4 × 3.5-inch, 10 × 2.5-inch and 20 + 2 E3.S builds, and above 400 W with no backplane or with 8 or 16 E3.S bays.
Dell’s summary matrix is stricter than its 4 × 3.5-inch layout table: it marks every processor from 320 W upwards as requiring DLC with that front, and holds the 280 W 9355 to 30°C there and in the 20 + 2 E3.S layout.
Dell quotes peak xGMI3 speeds of up to 32 Gbps in the processors’ integrated I/O.
03 — Memory
24 DIMM slots, 12 per processor
Each processor has 12 DDR5 channels with a single slot per channel, so the R6725 carries 12 RDIMMs per socket and 24 in total. With never more than one DIMM on a channel, Dell rates every supported module, 16 GB to 256 GB, at up to 6400 MT/s, subject to the processor model and population.
Capacity with every slot filled
by DIMM size
Operating speed
per Dell memory tables
Processor
1 DIMM / channel
2 DIMMs / channel
EPYC 9005, all 20 SKUs
Up to 6400 MT/s
Not offered
Dell’s memory chapter quotes up to 6.14 TB, while its comparison table and spec sheet say 6 TB; both describe 24 × 256 GB, or 6,144 GB.
The 16 GB DIMM comes in single-rank and dual-rank versions; every module is a 1.1 V RDIMM, and UDIMMs are not supported.
CXL 2.0 Type 3 memory runs from riser configuration 3, one x16 port per processor. The documented build is 24 × 96 GB native (2,304 GB) plus two add-in cards with four 96 GB DIMMs each, for 3,072 GB.
For CXL, Dell requires all native slots populated, a minimum of four DIMMs on each card and at most two cards per processor, and it cannot cool 256 GB DIMMs on a card.
With two sockets the BIOS adds NPS0, a single NUMA domain across the whole server, to the NPS1, NPS2 and NPS4 options.
In ASHRAE A3 or A4 conditions, RDIMMs of 64 GB or larger are not supported in any layout.
04 — Storage
8 drive-bay layouts, up to 22 bays
The R6725 offers the same families of 2.5-inch, 3.5-inch and E3.S fronts as the R6715, plus an 8 × E3.S option. Its densest build has 20 E3.S Gen5 bays at the front and two at the rear. Front PERC controllers keep RAID out of the three PCIe slots; software RAID is not offered.
Headline layouts
front panel view
Front panel
Rear module
Twenty E3.S Gen5 NVMe bays at the front and two at the rear, 22 in all. Dell’s riser table lists no configuration with rear storage, so confirm the riser build for this layout.
SAS/SATANVMeSAS/SATA + NVMe
Controllers & boot
PERC H975i — RAID, 192MB cache. Avenger 2 premium performance; 1 GB DDR4-2400 memory, 192 MB cache, x16 PCIe 5.0; front DC-MHS; ESXi requires 9.0 or later
PERC H965i — RAID, 8GB cache. Avenger 1; 8 GB DDR4-3200; DC-MHS form factor; x16 PCIe 4.0
PERC H365i — RAID. Avenger 1; x8 PCIe 4.0; no cache memory listed
BOSS-N1 DC-MHS (RAID 0/1, 2 x M.2 NVMe 480 GB or 960 GB read-intensive) — boot
Dell’s riser table marks rear storage as not possible in all five R6725 riser configurations, yet the guide lists the 20 + 2 E3.S layout and shows a rear view with a drive cage between the two riser slots.
Controllers: PERC H975i (x16 PCIe 5.0, 192 MB cache), H965i (8 GB DDR4) and H365i inside, with H965e and HBA465e for external storage. The H975i needs ESXi 9.0 or later.
The rear BOSS-N1 DC-MHS module mirrors (RAID 1) or stripes (RAID 0) two read-intensive M.2 NVMe drives of 480 GB or 960 GB; it is not hot-plug.
Tri-Mode is not supported, so SAS, SATA and NVMe drives are never mixed behind one controller.
Dell’s drive list reaches 61.44 TB for E3.S and 2.5-inch NVMe and 24 TB for 3.5-inch hard drives, with 32 TB drives marked for later.
Every documented layout
8 with drive bays
2.5-inch3.5-inchEDSFF (E1.S / E3.S)
05 — Accelerators & I/O
GPUs, PCIe and networking
Accelerators are confined to low-profile cards. Dell’s comparison allows three 75 W low-profile x16 cards and names only the NVIDIA L4 (24 GB), for which it suggests 108–144 GB of system memory with three installed. GPUs are not supported at all in ASHRAE A3 or A4 conditions. Up to 3 × 75 W low-profile x16 cards (NVIDIA L4); BlueField-3 B3220 DPU in riser configuration 3, slots 1 and 4.
NVIDIA L4
single-wide
24GB · up to 3
I/O topology
128 lanes per CPU
Dell’s processor notes give every EPYC 9005 a budget of 128 high-speed lanes and quote peak xGMI3 speeds of up to 32 Gbps. Riser connectors 1 and 2 hang off the first processor and connectors 3 to 5 off the second, feeding three x16 Gen5 slots and a second OCP position.
Network adapters Dell lists
15 options
Adapter
Ports
Form
Broadcom 2 x 200GbE QSFP112 OCP 3.0
2 × 200GbE
OCP 3.0
Broadcom 2 x 25GbE SFP28 OCP 3.0
2 × 25GbE
OCP 3.0
Intel 4 x 10GbE BT OCP 3.0
4 × 10GbE
OCP 3.0
Broadcom 4 x 10GbE BT OCP 3.0
4 × 10GbE
OCP 3.0
Intel 2 x 10GbE BT OCP 3.0
2 × 10GbE
OCP 3.0
Broadcom 2 x 10GbE BT OCP 3.0
2 × 10GbE
OCP 3.0
Broadcom 4 x 1GbE BT OCP 3.0
4 × 1GbE
OCP 3.0
Intel 4 x 1GbE/2.5GbE BT OCP 3.0
4 × 1GbE/2.5GbE
OCP 3.0
NVIDIA 2 x 100GbE QSFP56 OCP 3.0
2 × 100GbE
OCP 3.0
NVIDIA 2 x 25GbE SFP28 OCP 3.0
2 × 25GbE
OCP 3.0
Broadcom 2 x 100GbE QSFP56 OCP 3.0
2 × 100GbE
OCP 3.0
Broadcom 4 x 25GbE SFP28 OCP 3.0
4 × 25GbE
OCP 3.0
PCIe AIC NIC 2 x 200GbE (configurable as 1 x 400GbE)
2 × 200GbE
PCIe
PCIe AIC NIC 2 x 100GbE
2 × 100GbE
PCIe
NVIDIA BlueField-3 B3220 DPU
2 × 200GbE
PCIe DPU
Slot 2 becomes the second OCP 3.0 slot with the R2e or R2p riser; with R2c it stays a PCIe slot.
All five riser configurations (2 to 6) are specified with two processors and a front PERC.
OCP cards are SFF, PCIe Gen5, up to x16 and four ports at 15–35 W; a 2 × 200 GbE card can run as one 400 GbE port.
Up to three add-in NICs (2 × 200 GbE or 1 × 400 GbE, and 2 × 100 GbE) and up to two FC32 or FC64 HBAs are supported.
The BlueField-3 B3220 DPU (2 × 200 GbE, FHHL, 150 W) is listed for slots 1 and 4 with riser configuration 3; the single-port 400 GbE B3140H is a post-launch item whose risers are still TBD.
06 — Power & cooling
8 power supplies, 800–1,800 W
Up to two 60 mm M-CRPS supplies run 1+1. For standard AC there are 800 W and 1100 W units in both efficiency classes plus a 1500 W Titanium; HVDC sites get a 1500 W supply for 277 VAC or 336 V DC, telco racks a −48 to −60 V DC unit rated at 1400 W, and an 1800 W Titanium is listed but was not orderable at the November 2025 launch.
AC277 VAC / HVDC
Low-line (100–120 V) ratings: 1050 W for the 1100 W and 1500 W units, the full 800 W for the 800 W units, and none for the 1800 W.
Dell’s acoustic test builds pair two 280 W processors with 1100 W supplies, and two 320 W processors with 1500 W supplies.
In ASHRAE A3 and A4 conditions both supplies must be fitted, and performance may drop if one fails.
Mismatched wattages: at POST the larger supply wins and a warning appears in the BIOS or iDRAC; a supply added while running is only enabled if it matches.
Cabling: C13 for every AC and 240 V DC unit including the 1800 W, APP/Saf-D-Grid for the 277 VAC supply, and a DC cable for the telco unit.
07 — Management, security & OS
Run it, secure it, choose the OS
Management
iDRAC10 (Core, Enterprise and Datacenter licences)
iDRAC Direct on the front USB-C port
Redfish RESTful API and Racadm CLI
Quick Sync 2 wireless module
OpenManage Enterprise with Power Manager, Services, Update Manager and APEX AIOps Observability
OpenManage integrations for VMware vCenter (with Aria Operations), Microsoft System Center and Windows Admin Center
Dell Repository Manager, Dell System Update, Enterprise Catalogs and SUU
Red Hat Ansible Collections and Terraform Providers
IPMI
Security
Silicon Root of Trust
Datacenter-ready Secure Control Module (DC-SCM)
Signed firmware and Secure Boot
Secured Component Verification
Data at Rest Encryption (SEDs, local or external key management)
System Lockdown (iDRAC10 Enterprise or Datacenter)
Secure Erase
TPM 2.0 FIPS, CC-TCG certified
AMD SEV and SME memory encryption
Chassis intrusion detection
PCIe link encryption
Operating systems
Canonical Ubuntu Server LTS
Microsoft Windows Server with Hyper-V
Red Hat Enterprise Linux
VMware ESXi
SUSE Linux Enterprise Server
08 — Compare
R6625 → R6725
Dell compares the R6725 with the R6625, the two-socket 1U EPYC 9004 server it replaces. DIMM count stays at 24 while speed rises from 4800 to 6400 MT/s, and the chassis gains a second OCP slot and 44.79 mm of depth.
4 dual-fan modules · STD, HPR Silver or HPR Platinum
Depth (with bezel)
772.13 mm
816.92 mm
Weight (Table 2)
20.2 kg max
21.2 kg max
Management
iDRAC9
iDRAC10
Source: Dell PowerEdge R6725 Technical Guide (May 2026, Rev. A06), Table 2 — Comparison of PowerEdge R6725 and R6625.
The R6725 family side by side
Dell’s EPYC 9005 rack servers divide by socket count and height. The R6725 is the two-socket 1U; the R6715 is its single-socket 1U counterpart with two DIMMs per channel, and the R7725 takes two sockets into 2U. The R6625 is the EPYC 9004 model it replaces, and the bars compare each one’s documented limits.
This modelSiblings and successorEach value from that model’s own verified spec file · bars scale per column
Four two-socket builds aimed at the workloads Dell names for the R6725 — virtualisation, VDI and HPC — plus a licence-conscious database. All parts come from the options our configurator permits for the R6725 and load straight into it; Dell’s layout-by-layout cooling limits for the exact processors are checked when we quote.
HPC
Diskless 192-core compute node
Two 96-core 9655s give 192 cores, and 24 × 64 GB fills every channel for 1.5 TB at up to 6400 MT/s — the memory bandwidth HPC codes lean on. With no drive backplane the node boots from BOSS-N1, and Dell’s no-backplane table sets no 30°C cap until processors exceed 400 W.
2 × AMD EPYC 9655 — 96 cores @ 2.6 GHz, 400 W each
Swapping in the 500 W 9965 or 9755 keeps this diskless chassis on air only with inlet air at 30°C or below. In ASHRAE A3 conditions, processors above 240 W are not supported.
Dell lists VDI among the R6725’s target workloads. Three low-profile NVIDIA L4s occupy all three PCIe slots, so user traffic runs through the OCP slot, while two 64-core 9555s provide 128 cores for desktop sessions and eight E3.S drives hold the images.
2 × AMD EPYC 9555 — 64 cores @ 3.2 GHz, 360 W each
3 × NVIDIA L4, 24 GB each, low-profile
24 × 64 GB DDR5 RDIMM — 1.5 TB
8 × 7.68 TB EDSFF E3.S NVMe — 61.44 TB raw
BOSS-N1 DC-MHS boot module
Broadcom 4 × 25GbE SFP28 OCP 3.0
2 × 1500 W Titanium (1+1)
VMware ESXi 9.0
Neither ASHRAE A3 nor A4 operation allows GPUs, and Dell’s warranty note covers only PCIe cards it has validated and tested.
Two 128-core 9745s give 256 cores for dense virtualisation. Twenty-four 96 GB DIMMs make 2,304 GB, the native population Dell pairs with two CXL add-in cards for 3,072 GB in its CXL table. The 16-bay E3.S front starts half-filled.
2 × AMD EPYC 9745 — 128 cores @ 2.4 GHz, 400 W each
24 × 96 GB DDR5 RDIMM — 2,304 GB
8 × 15.36 TB EDSFF E3.S NVMe on the 16-bay front — 122.88 TB raw
BOSS-N1 DC-MHS boot module
Broadcom 2 × 100GbE QSFP56 OCP 3.0
2 × 1500 W Titanium (1+1)
VMware ESXi 9.0
CXL cards are not part of this build. Dell’s documented CXL option uses riser configuration 3 and needs every native slot filled; 256 GB DIMMs on a CXL card are not thermally supported.
Two 16-core 9175Fs — 4.2 GHz base and 512 MB of L3 each — hold a per-core-licensed database to 32 cores while all 24 channels run at up to 6400 MT/s. In the 8 × E3.S layout, Dell’s air-cooling limit only drops to 30°C for processors above 400 W.
2 × AMD EPYC 9175F — 16 cores @ 4.2 GHz, 320 W each
5–40°C · processors up to 240 W (195 W with 4 × 3.5" or 10 × 2.5"), no GPUs, no 64 GB+ RDIMMs
ASHRAE A4
5–45°C · of the seven layouts tabulated, only no-backplane and 8 × 2.5" · processors up to 195 W
Maximum operating altitude
3,048 m
Acoustics
E3.S test build: 6.7 B idle, 9.1 B / 76 dB at full load and 35°C
12 — FAQ
R6725 questions, answered from the documentation
What is the maximum memory of the Dell PowerEdge R6725?
Six terabytes: 24 × 256 GB RDIMMs, 12 per processor, each on its own channel so memory still runs at up to 6400 MT/s. Dell’s memory chapter writes the figure as 6.14 TB, the same 6,144 GB. With CXL, Dell documents 3,072 GB built from 24 × 96 GB plus two CXL add-in cards.
Which processors does the R6725 support?
Dell lists twenty EPYC 9005 parts, the smallest being the 8-core 9015 and the largest the 192-core 9965, rated 125 W to 500 W; every riser configuration assumes two of them. The 500 W 9965 and 9755 run on air only in some layouts and at 30°C inlet or below; Dell’s summary matrix marks liquid cooling as required for them in several others.
How many drive bays does the R6725 have?
Up to 22: 20 EDSFF E3.S Gen5 bays at the front and two E3.S at the rear. Smaller fronts: 8 or 16 E3.S bays, ten 2.5-inch bays (all SAS/SATA, or four of them Universal), eight 2.5-inch Universal or U.2 bays, four 3.5-inch bays, or none at all. Dell’s riser table lists no configuration with rear storage, so the rear-drive build is confirmed at quotation.
How many GPUs does the R6725 support?
Up to three 75 W low-profile x16 cards. The NVIDIA L4 (24 GB) is the only GPU Dell names, with 108–144 GB of system memory recommended for three of them. Of the ASHRAE classes Dell tabulates, GPUs are allowed only in A2.
How many PCIe and OCP slots does the R6725 have?
Slots 1, 2 and 4 are x16 PCIe Gen5. OCP NIC 3.0 cards sit in slot 5 and, with the R2e or R2p riser, in slot 2 in place of a PCIe card. Riser connectors 3 to 5 are wired to the second processor.
Which power supplies does the R6725 take?
Two 60 mm hot-plug supplies, 1+1 redundant. AC choices are 800 W or 1100 W (Platinum or Titanium) and a 1500 W Titanium; for other feeds Dell offers 1500 W at 277 VAC or 336 V DC, plus a telco supply rated 1400 W at −48 to −60 V DC. Dell’s 1800 W Titanium for 200–240 V is marked as a post-launch option, and low-line 100–120 V input cuts the 1100 W and 1500 W units to 1050 W.
How big and heavy is the PowerEdge R6725?
With the bezel the chassis measures 42.8 × 482 × 816.92 mm (height × width × depth). Fully populated weight runs from 17.06 kg with no backplane to 21.34 kg for the 8 × 2.5-inch Universal or U.2 build, although Dell’s comparison table gives 21.2 kg as the maximum.
Should I choose the R6725 or the single-socket R6715?
Both are 1U EPYC 9005 servers with 24 DIMM slots, 6 TB and three x16 Gen5 slots. The R6725 fills two sockets — up to 192 cores and 500 W each, 12 slots per processor at 6400 MT/s, and CXL memory. The R6715 has one socket with two DIMMs per channel at 5200 MT/s or less, tops out at 160 cores and 400 W, and does not support CXL.
What changed from the R6625 to the R6725?
In Dell’s comparison the core ceiling per socket climbs from 128 (4th Gen EPYC) to 192 (EPYC 9005), the same 24 DIMM slots go from 4800 to 6400 MT/s, and GPU support grows from two 75 W cards to three. It adds 8- and 20-bay E3.S fronts, a second OCP slot and iDRAC10, and drops the LOM option and S160 software RAID.
Is the Dell PowerEdge R6725 end of life?
Not according to Dell’s May 2026 R6725 guide, which contains no end-of-sale or end-of-support date and still lists some options, the 1800 W supply among them, as later additions. When Dell announces dates, our end-of-life checker will show them.
Specifications are extracted from Dell’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.
