Intel Arc Pro B60 24GB vs M3 Ultra 512GB for local LLMs
8 reports on the Intel Arc Pro B60 24GB and 41 on the M3 Ultra 512GB
Which is faster for local LLMs?
On Qwen3.8 27B at 4-bit, the Intel Arc Pro B60 24GB has 22.0 generation tokens/s (3 runs); prompt processing 379.5 tokens/s (2 runs); the M3 Ultra 512GB has 31.8 generation tokens/s (one run); prompt processing 391.2 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 1.8x higher on the M3 Ultra 512GB (456 GB/s on the Intel Arc Pro B60 24GB, 819 on the M3 Ultra 512GB). Across 2 shared models with generation measurements on both cards, the Intel Arc Pro B60 24GB's median is higher on 0 and the M3 Ultra 512GB's on 2.
- Memory
- 24GB
- Memory bandwidth
- 456 GB/s
- FP16 compute
- 98.5 TFLOPS
- Reports
- 8
- Memory
- 512GB unified
- Memory bandwidth
- 819 GB/s
- FP16 compute
- 28.4 TFLOPS
- Reports
- 41
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 | Intel Arc Pro B60 24GB | M3 Ultra 512GB |
|---|---|---|
| Qwen3.8 27B4-bit | 22.03 runsPP 379.5 (2 runs)llama.cpp, 1 not stated512 to 150K context | 31.8one runPP 391.2 (one run)MLXcontext not stated |
| Qwen3.5 35B · 3B active4-bit | 8.3one runPP 112.6 (one run)llama.cppcontext not stated | 80.9one runPP 2779.0 (one run)llama.cppcontext 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 | Intel Arc Pro B60 24GB | M3 Ultra 512GB |
|---|---|---|
| Qwen3.8 27B | 16.5 t/sQ4_K_M | 8.0 t/sFP16 |
| Qwen3.5 35B · 3B active | 58.5 t/sQ4_K_S | 28.7 t/sFP16 |
| Qwen3.8 125B · 6B active | 17.8 t/sQ2_K, experts in RAM | 13.6 t/sFP16 |
| Qwen3.6 35B · 3B active | 58.5 t/sQ4_K_S | 28.7 t/sFP16 |
| DeepSeek V4 Flash 284B · 13B active | doesn't fit at these settings | 22.6 t/sQ8_0 |
| Qwen3.6 27B | 16.5 t/sQ4_K_M | 8.0 t/sFP16 |
| Gemma 4 26B · 4B active | 37.2 t/sQ5_K_S | 21.5 t/sFP16 |
| DeepSeek V4.1 Flash 552B · 16B active | doesn't fit at these settings | 30.0 t/sQ4_K_M |
Change the context, RAM or model in the calculator: Intel Arc Pro B60 24GB · M3 Ultra 512GB
Every report on each card, with its source: Intel Arc Pro B60 24GB · M3 Ultra 512GB