AMD Radeon PRO W7900

Official identity

Card

AMD Radeon PRO W7900

gfx

gfx1100

RDNA 3

Published VRAM

48 GB

Hardware label, not a bench

Peak bandwidth

864 GB/s

AMD W7900 product page — peak memory bandwidth 864 GB/s

Board power

295 W TBP

AMD W7900 product page — Total Board Power 295 W; 2×8-pin; 750 W minimum PSU

ROCm matrix

Official

48 GB workstation. Dual-slot sibling is also listed.

Form factor: Active cooler, full-height triple-slot, 11 in / 280 mm. AMD W7900 datasheet — Active, 11” (280 mm), Triple Slot, Full Height. AMD lists a Dual Slot sibling in the same 48 GB class. This sheet sizes the standard W7900, not that dual-slot board.

Cited support row: ROCm 10.1.0 compatibility matrix and Linux system requirements. We do not invent a support claim past that listing. AMD product page: PRO W7900. Datasheet: PRO W7900 datasheet.

HSA_OVERRIDE: Not needed on current 10.x.

What fits on this card (256K context)

Shopper verdict at 4K, then follow the pair page for 32K and full context. Q4 and up. No printed prices.

Workstation vs consumer

Built only from cited AMD product-page specs already on this sheet and the consumer /gpus pages. We do not invent a decode number or a street price.

1. 48 GB sticker vs two consumer cards

   One W7900 is 48 GB GDDR6 (AMD product page). Two RX 7900 XTX cards are also 48 GB (24 + 24) on the same gfx1100 family, each citing 960 GB/s and 355 W typical board power. That is two boards, two coolers, and two consumer TBP envelopes — not one 48 GB workstation sticker. We do not invent a decode winner.

2. W7900 vs the measured R9700

   The R9700 is the measured 32 GB gfx1201 north star (640 GB/s, 300 W TBP on its product page). The W7900 is 48 GB gfx1100, 864 GB/s, 295 W TBP, official on the cited ROCm 10.1 row — and not measured on the local desktop. More VRAM on the sticker is not a measured decode claim.

3. Dual Slot sibling

   AMD lists a Dual Slot W7900 sibling in the same 48 GB class. This sheet sizes the standard triple-slot 11 in board from the datasheet. Confirm the cooler you are buying.

What fits in VRAM

llama.cpp, f16 KV, 1 GPU and 2 GPUs (split). Q6 / Q5 / Q4 rows are calculator estimates. UD-Q3_K_XL is a labeled estimate — not a local desktop run. Speed stays not yet measured on our R9700s. Tables cover house 35B, Flash, and every cited /models page. Change quant or context in the calculator.

House 35B Q3 cite: Hugging Face listing for Qwen3.6-35B-A3B-UD-Q3_K_XL.gguf (16.8 GB). Other Q3 rows use the calculator publisher-file note for that model.

System RAM

Minimum system RAM needed and RAM needed at full context for Qwen3.6-35B-A3B on llama.cpp at Q4_K_M, 32K selected and the model’s full context. Estimate until a first-party amdai-bench/run@1 card exists for this SKU. Rounded up to a real DIMM kit. Offload rows on the other /models tables repeat both labels.

llama.cpp-first stack

1. Step 1

   llama.cpp first

   Vulkan and ROCm/HIP are both in scope on this official gfx1100 workstation row. HIP when rocminfo lists gfx1100. Ollama and vLLM are secondary — not the house path for this card.

2. Step 2

   gfx1100 family package

   gfx1100 needs the gfx110x ROCm family package, same pin as the W7800 and the consumer 7900 XTX / XT / GRE. Do not mix a gfx1201 (R9700 / 9070 XT) or gfx1030 (W6800) install. Re-check the cited matrix before you install.

3. Step 3

   48 GB W7900, not two 24 GB cards

   This sheet sizes the 48 GB workstation sticker. AMD product page: 48 GB GDDR6, 864 GB/s, 295 W TBP. Two consumer 7900 XTX cards are a different layout. Size the file on the calculator before you download.

4. Step 4

   Setup, then Stack Lab doctor

   First-run setup is Ubuntu. Open Stack Lab doctor for the gfx110x install family, then record an amdai-bench/run@1 card if you measure this SKU. House daily and Flash profiles are R9700 / local desktop — they do not apply here. Packages are not published yet.

Compare with…

Head-to-head pages use the same VRAM, bandwidth, and calculator fit already on the sheets. Q3 is a labeled estimate. No invented prices. PRO W7900 against the other published sheets:

• Compare GPUs
• vs PRO W7800
• vs R9700
• vs RX 7900 XTX

Also: PRO W6800 · PRO W7700 · RX 6700 XT · RX 6800 XT · RX 6950 XT · RX 7600 · RX 7600 XT · RX 7700 XT · RX 7800 XT · RX 7900 GRE · RX 7900 XT · RX 9060 XT · RX 9070 · RX 9070 GRE · RX 9070 XT · Strix Halo