Used NVIDIA A100 80GB Tensor Core GPU (PCIe and SXM4)

Used NVIDIA A100 80GB: One GPU, Two Form Factors, a 46% Price Gap

The same GA100 die and the same 80GB of HBM2e ship in two packages, and on the used market they price like two different products. On September 9, 2026, US sellers on eBay were asking a median $18,500 for the A100 80GB PCIe card and $9,925 for the A100 80GB SXM4 module. The gap is not a bargain signal. A bare SXM4 module plugs into an HGX A100 baseboard and nothing else, so the buyers for it are people who already own the board with an empty socket. The PCIe card goes into any server with a free PCIe Gen4 x16 slot, a 300W power budget, and enough chassis airflow to cool a passive dual-slot card.

Sort out which one your hardware accepts first. Then read the prices.

Market Price (Observed): Used NVIDIA A100, September 2026

These are live asking prices from US-located eBay listings for single cards or modules, pulled through the eBay Browse API on September 9, 2026. Asks, not sold prices. We excluded lots, servers, brackets, cables, and listings flagged as defective. Where fewer than three US listings existed, we print "price on request" rather than a number.

Two things in that data you should know before you anchor on the medians. All 15 US PCIe asks were secondhand stock: 10 listed as used, 4 as open-box, 1 as certified refurbished, none as new. The new-in-box asks in the wider set were all outside the US and ran higher. And one $12,500 US listing that would have been the cheapest used 80GB PCIe card was titled "ECC Error." We dropped it from the table. A seller who tells you about the ECC error in the title is doing you a favor; a seller who doesn't is the one this page is about.

The full global set was 22 PCIe asks from 17 sellers (high of $31,196, a new card from Canada) and 9 SXM4 asks from 8 sellers, including two Dell V40HX-branded 500W SXM4 modules from Poland at $13,803 and $14,070.

Datasheet Specs: A100 80GB PCIe vs SXM4

From the NVIDIA A100 Tensor Core GPU datasheet (June 2021) and the A100 80GB PCIe product brief. Compute is identical across the two form factors; memory bandwidth and power are not.

The 40GB cards use HBM2 at 1,555 GB/s in both form factors, with a 250W TDP for PCIe. If a listing says "A100 80GB" and the photo shows a bare module with a bottom-mounted connector array and no PCIe edge, it is an SXM4 module regardless of what the title says.

Before You Pay: Three nvidia-smi Checks and Two Walk-Away Lines

Ask the seller to run these on the exact card, screenshot the output with the serial number visible, and send it. Every A100 supports them; a seller who cannot produce them either doesn't have the card in a working host or doesn't want you to see the result.

1. Row remapper state. nvidia-smi -q -d ROW_REMAPPER reports remapped rows (correctable and uncorrectable) plus a pending flag. A100 HBM2e uses row remapping in place of the older page-retirement scheme. Walk away if "Pending" is Yes or "Remapping Failure Occurred" is Yes. A handful of correctable remaps with no pending flag is normal wear on a data-center pull.
2. ECC error counters. nvidia-smi -q -d ECC shows volatile and aggregate counts. Walk away on any aggregate uncorrectable count above zero. Aggregate correctable counts in the low hundreds on a multi-year card are typical; thousands are a card that has been running hot or is on its way out.
3. Throttle reasons under load. With a sustained load running (a gpu-burn pass or your own training step), nvidia-smi -q -d PERFORMANCE lists active clock throttle reasons. Thermal slowdown or power-brake throttling on a PCIe card at 300W in a properly cooled chassis means a failing heatsink interface or a seller testing it on a desk fan. Software power cap is fine; HW slowdown is not.

Also record nvidia-smi -q -d INFOROM (the InfoROM image version and ECC mode) and confirm the board part number on the label matches the listing: 900-21001-0020-xxx is the 80GB PCIe family, and two of the US listings printed it in the title.

Below roughly $13,000 for an 80GB PCIe card sold as working, you are underneath every US ask we saw except the one with the ECC error in its title. Treat that price as a question, not a discount.

Frequently Asked Questions

Q: How much does a used NVIDIA A100 80GB cost in 2026? A: On September 9, 2026, US eBay asking prices for a single A100 80GB PCIe card ran $14,950 to $24,999 with a median of $18,500 across 15 listings. The 80GB SXM4 module ran $8,300 to $12,200, median $9,925, across 4 US listings. These are asks, not sold prices, and they move weekly. Email parts@caladansemi.com for a current quote on tested units.

Q: Why is the A100 SXM4 module so much cheaper than the PCIe card? A: Because almost nobody can use it. The SXM4 module only installs on an NVIDIA HGX A100 baseboard (4 or 8 sockets) or inside a DGX A100. If you don't already own one of those with an open socket, the module is a paperweight, and the price reflects the small pool of buyers. The PCIe card fits any server with a Gen4 x16 slot, a spare 300W, and enough airflow for a passive card.

Q: What is the difference between A100 80GB PCIe and SXM4 specs? A: Same 6,912 CUDA cores, 432 Tensor cores, and 80GB of HBM2e. The SXM4 module runs its memory at 2,039 GB/s and a 400W TDP; the PCIe card runs 1,935 GB/s at 300W. Interconnect differs too: SXM4 gets full 600 GB/s NVLink across the HGX board, while a PCIe card gets 600 GB/s NVLink only to one partner card through a bridge, otherwise PCIe Gen4 at 64 GB/s. Source: NVIDIA A100 datasheet, June 2021.

Q: What should I check before buying a used A100? A: Three nvidia-smi outputs from the actual card: ROW_REMAPPER (no pending remaps, no remapping failure), ECC (zero aggregate uncorrectable errors), and PERFORMANCE under sustained load (no HW thermal or power-brake throttling). Match the board part number on the label to the listing, and get the serial number in the screenshot. Caladan runs these on every unit we ship and includes the output with the quote.

Need a tested A100 80GB with the diagnostics attached? Email parts@caladansemi.com with quantity, form factor (PCIe or SXM4), and the host system it's going into. We'll tell you which of this week's listings we would actually buy, and at what price.

Deciding between the card and the module? Read A100 80GB PCIe vs SXM4: why the used SXM module asks $8,575 less, built from the same September 9 comps.