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NVIDIA · Workstation · Blackwell
NVIDIA RTX PRO 4000 Blackwell
Single-slot, 145 W: four fit where two consumer cards would.
VRAM
24 GB
GDDR7 ECC
Memory bandwidth
672 GB/s
FP16 compute
not published
Price
No list price
What fits at 4-bit
The 4-bit file plus 8,192 tokens of context and 1.5 GB of overhead, against the VRAM of one card. Speeds are measured medians where someone has published a run at that card count; a blank speed means no run, not a slow one. Machine pages carry estimates for the gaps.
| Model | Needs | 1 card (24 GB) |
|---|---|---|
| Qwen3.5 4B4B · Q4_K_M | 4.3 GB | fits |
| Llama 3.1 8B Instruct8B · Q4_K_M | 7.1 GB | fits |
| Qwen3 8B8.2B · Q4_K_M | 7.3 GB | fits |
| Gemma 4 E4B IT8B · Q4_K_M | 6.5 GB | fits |
| Granite 4.2 8B8.8B · Q4_K_M | 7.9 GB | fits |
| Qwen3.5 9B9B · Q4_K_M | 7.0 GB | fits |
| Gemma 4 12B IT11.95B · Q4_K_M | 8.2 GB | fits |
| Ministral 3 14B Reasoning (2512)13.9B · Q4_K_M | 10.4 GB | fits |
| Phi-414.7B · Q4_K_M | 11.3 GB | fits |
| gpt-oss-20b21B, 3.6B active · MXFP4 (native) | 12.5 GB | fits |
| Devstral Small 2 24B (2512)24B · Q4_K_M | 16.1 GB | fits |
| Qwen3.6 27B27B · Q4_K_M | 17.7 GB | fits |
| Gemma 4 26B-A4B IT25.2B, 3.8B active · Q4_K_M | 17.4 GB | fits |
| Qwen3.8 27B27B · Q4_K_M | 18.2 GB | fits |
| Granite 4.2 30B29.3B · Q4_K_M | 20.3 GB | fits |
| Gemma 4 31B IT30.7B · Q4_K_M | 18.9 GB | fits |
| Qwen3 Coder 30B-A3B Instruct30.5B, 3.3B active · Q4_K_M | 19.5 GB | fits |
| Ornith 1.5 35B-A3B35B, 3B active · Q4_K_M | 21.9 GB | fits |
| Qwen3.6 35B-A3B35B, 3B active · Q4_K_M | 22.4 GB | fits |
Measured speeds
No published single-user run on this card that we could match to a model and quant.
Speculative decoding, several users, or long context
Kept apart because each measures a different workload from one person chatting near the start of a conversation.
| Model | Quant | Backend | Generation | Prompt | Context | Measured on | Source |
|---|---|---|---|---|---|---|---|
| Qwen3.8 27B | custom 5.01 BPW iMatrix/NVFP4 hybrid GGUF | llama.cpp master + pinned PRs (#26001,#26048,#26705,#27173 MTP chain,#24891,#25635) | 50 tok/s | – | 0 | RTX PRO 4000 Blackwell | llama.cpp benchmark discussion2026-08 |
| Qwen3.8 27B | custom 5.01 BPW iMatrix/NVFP4 hybrid GGUF | llama.cpp (clean master, build not stated) | 45 tok/s | – | 0 | RTX PRO 4000 Blackwell | llama.cpp benchmark discussion2026-08 |
| Qwen3.8 27B | custom 5.01 BPW iMatrix/NVFP4 hybrid GGUF | llama.cpp master + pinned PRs (MTP chain) | 13 tok/s | – | 261,500 | RTX PRO 4000 Blackwell | llama.cpp benchmark discussion2026-08 |
Specifications
- Memory
- 24 GB GDDR7 ECC
- FP16 basis
- Datasheet gives 1,178 AI TOPS (FP4 sparse); the product page says 1,290. No dense FP16 tensor figure.
- Board power
- 145 W
- Slots
- 1
- Length
- 241 mm
- PCIe
- Gen 5 x16
- NVLink
- No
- Cooling
- Blower
- Software
- CUDA, Vulkan
- Released
- 2025
- Availability
- sold new
- Price basis
- No NVIDIA list price found.
- Maker page
- nvidia.com
Sources
- nvidia.com: datasheet: 24 GB GDDR7 ECC 192-bit, 672 GB/s, PCIe 5.0 x16, 145 W, 4.4 x 9.5 in single slot, active, 1178 AI TOPS
- nvidia.com: product page: 1290 AI TOPS