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Quick Answer
The RX 7800 XT and RTX 4070 are neck-and-neck in rasterization at 1440p, with the 7800 XT winning by 2-5% in most titles. The RTX 4070 wins in ray tracing and has DLSS 3 Frame Generation. The 7800 XT costs $130 less and has 16GB VRAM vs 12GB.
The 7800 XT wins rasterization by 3-5% on average.
NVIDIA wins RT performance by 25-30%. With DLSS, the gap widens further.
DLSS 3 Frame Generation is available in 100+ games and produces noticeably better quality than FSR 3. In supported titles, the RTX 4070 effectively outperforms the 7800 XT by 30-50%. However, in non-DLSS titles, the 7800 XT leads.
The 7800 XT's 16GB VRAM is a significant advantage for future-proofing. Several 2026 titles already use 10-12GB at 1440p Ultra. The RTX 4070's 12GB is adequate today but may limit texture quality in 2-3 years.
Our Verdict
The RX 7800 XT wins on value: more VRAM, faster rasterization, and $130 cheaper. The RTX 4070 wins if you prioritize DLSS 3 and ray tracing. Both are excellent 1440p GPUs - pick based on your gaming priorities.