Radeon RX 7800 XT vs Radeon RX 9070 for Local AI
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Which GPU is better for local AI workloads?
Both are 16GB/640-class bandwidth cards (624 vs 640 GB/s). The 9070's advantages are generational: official ROCm support on RDNA4, better compute, and lower idle power. The 7800 XT at $499 launched cheaper and remains a solid used-market 16GB buy.
Spec comparison: what actually differs
The table below is computed live from our hardware database. Positive deltas favor the Radeon RX 7800 XT.
| Specification | Radeon RX 7800 XT | Radeon RX 9070 | Difference |
|---|---|---|---|
| VRAM | 16 | 16 | — |
| Memory bandwidth | 624 | 640 | -3% |
| Memory type | GDDR6 | GDDR6 | — |
| Memory bus | 256 | 256 | — |
| TDP | 263 | 220 | +20% |
| Stream processors | 3840 | 3584 | +7% |
| Architecture | RDNA 3 | RDNA 4 | — |
| Launch MSRP | $499 | $549 | -9% |
| Street price | $499 | $549 | -9% |
What about price?
Which one should you buy for LLMs and image generation?
Radeon RX 7800 XT
Buy a discounted/used 7800 XT for value 16GB.
Full specs & benchmarks →Radeon RX 9070
Buy the 9070 for current-gen support and efficiency (220W vs 263W).
Full specs & benchmarks →Is it faster for LLM inference?
Effectively tied on bandwidth; both hold 14B Q8. The 9070's software path is smoother under current ROCm.
How does it handle image generation?
9070 faster on compute; capacity equal.
Which AI models fit on each card?
Computed from our model VRAM database at Q4 quantization: Radeon RX 7800 XT has 16 GB, Radeon RX 9070 has 16 GB.
Fit on both cards
Frequently asked questions
7800 XT vs 9070 for local AI?
Nearly identical capacity (16GB) and bandwidth (624 vs 640 GB/s). The 9070 adds official ROCm 7.x support on RDNA4 — meaningfully less setup friction.