Side-by-side GPU comparison: specs, memory, compute performance, and live cloud pricing.
Verdict
M3 Ultra (192 GB) has 64 GB more VRAM, making it better suited for large models and long context windows. For compute-bound workloads like training, H100 PCIe delivers 27.8× higher FP16 throughput. M3 Ultra (192 GB) supports a broader range of models (657 vs 636 from this catalog), giving more flexibility.
Specifications
| H100 PCIe | M3 Ultra (192 GB) | |
|---|---|---|
| VRAM | 80 GB | 144 GB |
| VRAM Type | HBM2e | LPDDR5 |
| Memory Bandwidth | 2.0 TB/s | 0.8 TB/s |
| FP16 Performance | 757 TFLOPS | 27 TFLOPS |
| Manufacturer | NVIDIA | Apple |
| FP8 Support | Yes | No |
| FP4 Support | No | No |
Price / Performance
Based on cheapest single-GPU on-demand pricing. Lower $/TFLOP = better compute value; lower $/GB = better memory value.
| H100 PCIe | M3 Ultra (192 GB) | |
|---|---|---|
| $/hr (cheapest) | $1.80 | — |
| $/TFLOP (compute value) | $0.0024 | — |
| $/GB VRAM (memory value) | $0.0225 | — |
Cloud Pricing
Cheapest on-demand price per provider (single GPU).
Model Compatibility
Models from the catalog that fit on each GPU, grouped by required precision.
H100 PCIe (636 models)
M3 Ultra (192 GB) (657 models)
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Pricing data refreshed hourly · Last updated April 11, 2026 · Browse all comparisons