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NVMe · PCIe Gen4 x16 add-in card

Liqid LQD4500 IO Accelerator
Up to 32 TB of NVMe on one card

Most NVMe SSDs sit in drive bays. The Liqid LQD4500 IO Accelerator puts NVMe capacity on a full PCIe x16 card instead: up to 32 TB, up to 4 million random read IOPS and up to 26 GB/s read throughput, without using a drive bay. It works in a standard server slot, or pooled in a Liqid chassis and composed to whichever GPU host needs fast local data.
32 TB[src]
RAW CAPACITY, ONE CARD
RANDOM 4K READ IOPS
26 GB/s[src]
READ THROUGHPUT
13 GB/s[src]
WRITE THROUGHPUT
2 DWPD[src]
ENDURANCE, UP TO 61.53 PBW
~75 W[src]
ACTIVE POWER
Specifications

LQD4500 technical specifications

All figures from Liqid's LQD4500 datasheet[src]. Liqid's storage web page headlines 10 μs, which is the datasheet's minimum write latency; minimum read latency is 70 μs.

Use the Liqid LQD4500 IO Accelerator where a server needs more NVMe capacity or read bandwidth than its drive bays can give, or where a GPU host needs fast local data next to its GPUs.

SpecificationLQD4500 IO Accelerator
Raw capacityUp to 32 TB
NANDTLC 3D NAND
Read / write bandwidthUp to 26 GB/s / up to 13 GB/s
Random 4K read / writeUp to 4M IOPS / up to 900K IOPS
Minimum read / write latency70 μs / 10 μs
Interface and protocolPCI Express 4.0 x16 · NVMe 1.3
Form factorFull-height, full-length, single width
EnduranceUp to 61.53 PBW / 2 DWPD (per capacity, on request)
Security256-bit AES data encryption; power-loss data protection
Power and airflowActive ~75 W at 12 VDC · minimum 400 LFM airflow
Operating temperature0–55 °C operating · −40 to 75 °C non-operating
Operating systemsWindows, RHEL, SLES, CentOS, Solaris, SUSE, VMware
Warranty3 years or maximum endurance used
LQD4500 read versus write performanceUpper-bound datasheet figures; actual results depend on capacity, queue depth and host.Throughput (GB/s)Random 4K IOPS (millions)Readsequential / random 4K26 GB/s4MWritesequential / random 4K13 GB/s0.9MUpper-bound datasheet figures; actual results depend on capacity, queue depth and host.
The LQD4500's read/write asymmetry. Reads run at twice the write bandwidth and over four times the write IOPS, which suits read-heavy work such as feeding GPUs, analytics scans and checkpoint restores. Source: LQD4500 datasheet.
Part numbers

Six capacities, two series

Liqid sells the card in two series, Data Center and Enterprise, with three capacities each[src]. It publishes PBW and DWPD per capacity on request, so we confirm endurance on the quote.
SeriesCapacityPart number
Data Center7.68 TBL4500-007T68-040
Data Center15.36 TBL4500-015T36-040
Data Center30.72 TBL4500-030T72-040
Enterprise6.4 TBL4500-006T40-040
Enterprise12.8 TBL4500-012T80-040
Enterprise25.6 TBL4500-025T60-040
LQD4500 capacity options by seriesEndurance differs by capacity and series; ask for the PBW table for your choice.Raw capacity (TB)L4500-007T68-040Data Center series7.68 TBL4500-015T36-040Data Center series15.36 TBL4500-030T72-040Data Center series30.72 TBL4500-006T40-040Enterprise series6.4 TBL4500-012T80-040Enterprise series12.8 TBL4500-025T60-040Enterprise series25.6 TBEndurance differs by capacity and series; ask for the PBW table for your choice.
LQD4500 capacities by series. Source: LQD4500 datasheet part-number table.
Deployment

In the server, or in the pool

The LQD4500 is a plain NVMe device, so it can live in two places.
Direct

In a host PCIe slot

Install it in a Gen4 x16 slot like any NVMe device: UEFI boot, software or OS RAID, no host CPU or DRAM offload[src]. Check slot length and airflow first, as it is a full-length card needing 400 LFM.
Composed

In a Liqid expansion chassis

The LQD4500 is on Liqid's compatibility list[src], so it can sit in a Liqid expansion chassis alongside GPUs and be composed to whichever host needs it. Liqid's SmartStacks support GPU-to-storage communication over the fabric[src].
Watch

Board compatibility notes

Liqid's compatibility list asks for bifurcation to be turned off on some boards, including the Dell R7515 and Gigabyte MZ92-FS0[src]. We check your host before quoting.
LQD4500 cards composed alongside GPUs to two hostsThe LQD4500 itself is a PCIe Gen4 device.LIQID Matrix softwareMatrix composes GPUs and NVMe from one pool viewmanagement networkHOST SERVERSTraining host6 GPUs + 2 LQD4500Inference host2 GPUs + 1 LQD4500ToR switchGen5 x16 fabricx16 per hostLiqid chassis · GPUs8 of 10 composedLiqid chassis · NVMe3 × LQD4500, up to 92 TBThe LQD4500 itself is a PCIe Gen4 device.
Example layout, as in a two-chassis SmartStack: two hosts and two Liqid chassis behind one fabric switch, one chassis holding GPUs and one holding LQD4500 cards, so each GPU host gets composed NVMe next to its GPUs. We confirm which chassis generation suits the cards on quote.

For a comparison with drive-bay NVMe, see our enterprise NVMe SSD guide. Liqid also lists Durham University's Institute for Computational Cosmology, which runs the COSMA system for the UK's DiRAC facility, among its composability case studies[src].

Supply & quote

Quote LQD4500 IO Accelerators

  • Tell us the capacity, write load and host servers; we pick the series and capacity.
  • We check slot, airflow and board notes on Liqid’s compatibility list for each host.
  • Direct install or composed in a Liqid chassis: we quote either.
  • Endurance confirmed per capacity before order.

Get a Liqid quote

Tell us what you want to pool and which servers you run. We size it against Liqid's hardware compatibility list and quote the complete build.

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FAQs

Liqid LQD4500: common questions

What is the Liqid LQD4500?

The Liqid Element LQD4500 is an NVMe storage device built as a single full-height, full-length PCIe Gen4 x16 add-in card rather than a drive. Liqid specifies up to 32 TB raw capacity, up to 4 million random 4K read IOPS and up to 26 GB/s read throughput, with power-loss data protection and 256-bit AES encryption.

Which LQD4500 capacities are available?

Two series. Data Center: 7.68 TB (L4500-007T68-040), 15.36 TB (L4500-015T36-040) and 30.72 TB (L4500-030T72-040). Enterprise: 6.4 TB (L4500-006T40-040), 12.8 TB (L4500-012T80-040) and 25.6 TB (L4500-025T60-040). Liqid publishes the endurance per capacity on request.

How much endurance does it have?

Up to 61.53 PBW or 2 DWPD, depending on capacity and configuration, with a 3-year warranty or until maximum endurance is used. Work out what your write load needs with our DWPD and TBW calculator.

Does the LQD4500 need a Liqid fabric?

No. It is a standard NVMe 1.3 device on a PCIe Gen4 x16 slot that installs straight into a server, with UEFI boot and software or OS RAID support. It can also sit in a Liqid expansion chassis and be composed to hosts with Matrix. Liqid’s compatibility notes ask for bifurcation to be turned off on some boards, such as the Dell R7515.

Which operating systems are supported?

Liqid lists Windows, RHEL, SLES, CentOS, Solaris, SUSE and VMware.

Is there a PCIe Gen5 IO Accelerator?

Liqid’s 2025 SmartStack datasheets offer the AX-5500 IO Accelerator as an add-on: up to 64 TB NVMe on a PCIe Gen5 x16 full-height, full-length card. Ask us for its current specification.

The Liqid range

More Liqid products we supply and quote

Keep exploring

Related Servnet guides, tools and hardware

Sources

Every specification on this page comes from Liqid's own product pages and datasheets, listed below with their dates. Where Liqid's web copy and a datasheet differ, we use the datasheet. Figures are confirmed against the current revision when we quote.

  1. LQD4500 IO Accelerator datasheet · dated 14 Apr 2025
  2. LIQID Storage Pooling Solutions (IO Accelerators, case studies) · web page, read 29 Oct 2026
  3. EX-5410P SmartStack datasheet (GPU) · dated 10 Dec 2025
  4. Liqid Hardware Compatibility List · dated 17 Aug 2026

LIQID, LIQID Matrix, SmartStack and UltraStack are trademarks of Liqid Inc. Servnet is an independent UK IT reseller; this page is our own guide to the range.

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