AMD RX 7900 XTX vs NVIDIA Tesla P40 24GB for local LLMs
45 reports on the AMD RX 7900 XTX and 11 on the NVIDIA Tesla P40 24GB
Which is faster for local LLMs?
On Qwen3.6 35B · 3B active at 4-bit, the AMD RX 7900 XTX has 125.5 generation tokens/s (one run); prompt processing 1874.7 tokens/s (one run); the NVIDIA Tesla P40 24GB has 9.7 generation tokens/s (one run). Those are community reports whose engines and settings differ, so the gap is a rough sign, not a controlled measure of the two cards. Memory bandwidth, which caps how fast a card can write, is 2.8x higher on the AMD RX 7900 XTX (960 GB/s on the AMD RX 7900 XTX, 346 on the NVIDIA Tesla P40 24GB).
- Memory
- 24GB
- Memory bandwidth
- 960 GB/s
- FP16 compute
- 123 TFLOPS
- Reports
- 45
- Memory
- 24GB
- Memory bandwidth
- 346 GB/s
- FP16 compute
- 12 TFLOPS
- Reports
- 11
Measured on both
Generation and prompt processing speeds from plain runs (one device, one request, no speculative decoding, the whole model in the device's memory) of the same model size at the same bit class. Each side shows the engines and reported context behind its median. Context can mean a configured window or prompt depth, so these are community comparisons with differing settings. How to read these
| Model | AMD RX 7900 XTX | NVIDIA Tesla P40 24GB |
|---|---|---|
| Qwen3.6 35B · 3B active4-bit | 125.5one runPP 1874.7 (one run)llama.cppcontext not stated | 9.7one runengine not statedcontext not stated |
Estimated by the calculator
The quant the calculator recommends for each card and its estimated speed at a 32,768-token context with 32 GB of system RAM, from memory bandwidth and the model's shape. Where a model was also measured above, the measurement wins.
| Model | AMD RX 7900 XTX | NVIDIA Tesla P40 24GB |
|---|---|---|
| Qwen3.6 35B · 3B active | 123.2 t/sQ4_K_S | 44.4 t/sQ4_K_S |
| Qwen3.8 27B | 34.8 t/sQ4_K_M | 12.5 t/sQ4_K_M |
| Qwen3.8 125B · 6B active | 19.5 t/sQ2_K, experts in RAM | 16.9 t/sQ2_K, experts in RAM |
| DeepSeek V4 Flash 284B · 13B active | doesn't fit at these settings | doesn't fit at these settings |
| Qwen3.6 27B | 34.8 t/sQ4_K_M | 12.5 t/sQ4_K_M |
| Gemma 4 26B · 4B active | 78.4 t/sQ5_K_S | 28.2 t/sQ5_K_S |
| GLM-5.3 320B · 18B active | doesn't fit at these settings | doesn't fit at these settings |
Change the context, RAM or model in the calculator: AMD RX 7900 XTX · NVIDIA Tesla P40 24GB
Every report on each card, with its source: AMD RX 7900 XTX · NVIDIA Tesla P40 24GB