GPU Comparison
Select up to 2 GPUs to analyze their pricing, performance, and specifications side-by-side.
On raw speed the GeForce RTX 5090 comes out dramatically faster — about 79% ahead of the GeForce RTX 4080 SUPER. It also wins on performance-per-dollar, making it the cleaner choice when you can afford it.
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GeForce RTX 5090 vs GeForce RTX 4080 SUPER: In-Depth Breakdown
Performance: GeForce RTX 5090 vs GeForce RTX 4080 SUPER
The GeForce RTX 5090 is dramatically faster, around 79% ahead of the GeForce RTX 4080 SUPER. That gap is enough to move it up a tier: the GeForce RTX 5090 is comfortable at 4K and high-refresh 1440p, while the GeForce RTX 4080 SUPER is better matched to 4K with upscaling and native 1440p. The GeForce RTX 5090 packs 21,760 CUDA cores versus 10,240 on the GeForce RTX 4080 SUPER.
Price & Value
The GeForce RTX 4080 SUPER currently lists from $2,000 GBP, $1,180 GBP less than the GeForce RTX 5090 at $3,180 GBP. Because it's both faster and competitively priced, the GeForce RTX 5090 wins on performance-per-dollar by about 12%. The GeForce RTX 4080 SUPER still sits about $1,001 GBP above its $999 GBP MSRP. The GeForce RTX 5090 still sits about $1,181 GBP above its $1,999 GBP MSRP.
Power & Efficiency
At 320W against 575W, the GeForce RTX 4080 SUPER is both the lower-power and the more efficient card, making it the easier build to cool and power.
VRAM & Future-Proofing
The GeForce RTX 5090 carries 32GB versus 16GB on the GeForce RTX 4080 SUPER. The extra 16GB helps at 4K, with high-resolution texture packs, and for content-creation or local-AI workloads that exhaust smaller buffers. The GeForce RTX 5090's memory is also faster — 1,792 GB/s versus 736 GB/s (512-bit vs 256-bit bus) — which helps feed the GPU at 4K and with heavy textures.
Which should you buy: GeForce RTX 4080 SUPER or GeForce RTX 5090?
The GeForce RTX 5090 is the all-round winner here — it's faster and the better value, so buy it if it fits your budget. Only consider the GeForce RTX 4080 SUPER if you find it at a steep discount.