Side-by-side GPU comparison: specs, memory, compute performance, and live cloud pricing.
Verdict
RX 7900 XTX has 12 GB more VRAM, making it better suited for large models and long context windows. For compute-bound workloads like training, RX 7900 XTX delivers 14.6× higher FP16 throughput. RX 7900 XTX supports a broader range of models (566 vs 486 from this catalog), giving more flexibility.
Specifications
| M4 (16 GB) | RX 7900 XTX | |
|---|---|---|
| VRAM | 12 GB | 24 GB |
| VRAM Type | LPDDR5X | GDDR6 |
| Memory Bandwidth | 0.1 TB/s | 1.0 TB/s |
| FP16 Performance | 8 TFLOPS | 123 TFLOPS |
| Manufacturer | Apple | AMD |
| FP8 Support | No | 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.
| M4 (16 GB) | RX 7900 XTX | |
|---|---|---|
| $/hr (cheapest) | — | — |
| $/TFLOP (compute value) | — | — |
| $/GB VRAM (memory value) | — | — |
Cloud Pricing
Cheapest on-demand price per provider (single GPU).
M4 (16 GB)
No cloud pricing available.
RX 7900 XTX
No cloud pricing available.
Model Compatibility
Models from the catalog that fit on each GPU, grouped by required precision.
M4 (16 GB) (486 models)
RX 7900 XTX (566 models)
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Pricing data refreshed hourly · Last updated April 11, 2026 · Browse all comparisons