GPU Comparison
Select up to 2 GPUs to analyze their pricing, performance, and specifications side-by-side.
The GeForce RTX 4090 is significantly faster than the GeForce RTX 4080, leading by roughly 29% in our performance index.
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GeForce RTX 4090 vs GeForce RTX 4080: In-Depth Breakdown
Performance: GeForce RTX 4090 vs GeForce RTX 4080
The GeForce RTX 4090 is significantly faster, around 29% ahead of the GeForce RTX 4080. That gap is enough to move it up a tier: the GeForce RTX 4090 is comfortable at 4K and high-refresh 1440p, while the GeForce RTX 4080 is better matched to 4K with upscaling and native 1440p. The GeForce RTX 4090 packs 16,384 CUDA cores versus 9,728 on the GeForce RTX 4080. The GeForce RTX 4090 also has more RT cores (128 vs 76) and more AI cores (512 vs 304), strengthening its ray-tracing and AI-upscaling performance.
Power & Efficiency
The GeForce RTX 4080 draws just 320W versus 450W for the GeForce RTX 4090, and it also delivers more performance per watt — so it runs cooler and quieter and needs less PSU headroom.
VRAM & Future-Proofing
With 24GB against 16GB, the GeForce RTX 4090 has more headroom for 4K textures and memory-hungry creative/AI tasks where the GeForce RTX 4080's 16GB can fall short. The GeForce RTX 4090's memory is also faster — 1,008 GB/s versus 717 GB/s (384-bit vs 256-bit bus) — which helps feed the GPU at 4K and with heavy textures.
Which should you buy: GeForce RTX 4080 or GeForce RTX 4090?
The GeForce RTX 4090 is the faster card by about 29%. With live pricing limited for this pair, base your decision on the spec differences above — particularly VRAM and power draw — and check current stock before buying.