NVIDIA CMP 170HX 64GB (unlocked) vs NVIDIA RTX 4090 for local LLMs
13 reports on the NVIDIA CMP 170HX 64GB (unlocked) and 42 on the NVIDIA RTX 4090
Which is faster for local LLMs?
On Qwen3.6 27B at 4-bit, the NVIDIA CMP 170HX 64GB (unlocked) has 38.0 generation tokens/s (one run); prompt processing 907.0 tokens/s (one run); the NVIDIA RTX 4090 has 25.0 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 48% higher on the NVIDIA CMP 170HX 64GB (unlocked) (1,493 GB/s on the NVIDIA CMP 170HX 64GB (unlocked), 1,008 on the NVIDIA RTX 4090).
- Memory
- 64GB
- Memory bandwidth
- 1,493 GB/s
- FP16 compute
- not on record
- Reports
- 13
- Memory
- 24GB
- Memory bandwidth
- 1,008 GB/s
- FP16 compute
- 330 TFLOPS
- Reports
- 42
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 | NVIDIA CMP 170HX 64GB (unlocked) | NVIDIA RTX 4090 |
|---|---|---|
| Qwen3.6 27B4-bit | 38.0one runPP 907.0 (one run)llama.cppcontext not stated | 25.0one runLM Studio120K context |
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 | NVIDIA CMP 170HX 64GB (unlocked) | NVIDIA RTX 4090 |
|---|---|---|
| Qwen3.6 27B | 30.4 t/sQ8_0 | 36.5 t/sQ4_K_M |
| Qwen3.8 27B | 30.4 t/sQ8_0 | 36.5 t/sQ4_K_M |
| Qwen3.8 125B · 6B active | 127.0 t/sQ3_K_S | 19.6 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 35B · 3B active | 109.5 t/sQ8_0 | 129.3 t/sQ4_K_S |
| Gemma 4 26B · 4B active | 82.1 t/sQ8_0 | 82.3 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: NVIDIA CMP 170HX 64GB (unlocked) · NVIDIA RTX 4090
Every report on each card, with its source: NVIDIA CMP 170HX 64GB (unlocked) · NVIDIA RTX 4090