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AMD Radeon RX 7800M vs AMD Radeon RX 7900 XT: Comparison
AMD Radeon RX 7800M and AMD Radeon RX 7900 XT separate most on vram: AMD Radeon RX 7800M at 12 GB, AMD Radeon RX 7900 XT at 20 GB, 40% in favour of AMD Radeon RX 7900 XT. Memory Bus Width splits them by another 40%, again favouring AMD Radeon RX 7900 XT. They match on gpu brand, memory type and architecture. In Blender Cycles (GPU) the AMD Radeon RX 7900 XT scores 3,626 against 1,936 for the AMD Radeon RX 7800M, a lead of 47%.
Specs
| Specification |  |  |
|---|---|---|
| GPU Brand | AMD | AMD |
| Series | Radeon RX 7000 (Mobile) | Radeon RX 7000 |
| Board Partner | OEM (varies by laptop model) | Reference |
| VRAM | 12 GB-40% | 20 GB |
| Tier | High-End | High End |
| Memory Type | GDDR6 | GDDR6 |
| Ray Tracing Support | true | Yes |
| TDP | 175W (configurable TGP) | 315 W |
| Architecture | RDNA 3 | RDNA 3 |
| Slot Width | N/A (mobile GPU, soldered to laptop motherboard) | 2.5 |
| Memory Bus Width | 192 bit-40% | 320 bit |
| Stream Processors | 3840 | 5376 |
Benchmarks
Measured results, not specifications. Percentages are the gap to the leading product in each test.
Blender Cycles (GPU)
Blender 4.5, Blender Open Data (CC0). Median of monster + junkshop + classroom, combined samples/min.
Blender renders 3D scenes by tracing light through them, which loads every shader unit on the card at once. The score measures sustained render throughput, so it tells you what a card does in Cycles and similar renderers rather than what it does in a game. Figures come from Blender's Open Data project, which places no restriction on reuse, and we publish the median of every submission for that card on the same Blender version.
Verdict
AMD Radeon RX 7800M
7.3 / 10 Expert Rating
A genuinely powerful mobile RDNA 3 GPU, competitive with high-end NVIDIA mobile parts, limited mainly by regional availability outside China.
AMD Radeon RX 7900 XT
8 / 10 Expert Rating
A solid high-end pick if its price and 20GB VRAM allocation match your target resolution.