GPU Comparison

Select up to 2 GPUs to analyze their pricing, performance, and specifications side-by-side.

Quick Verdict

The GeForce RTX 5090 is dramatically faster than the GeForce RTX 5080, leading by roughly 47% in our performance index. The GeForce RTX 5080, however, delivers more performance per dollar — $2,180 GBP cheaper.

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VS
NVIDIA
GeForce RTX 5090
Price
£3,180
Perf Index
100%
Value Score
0.031
VRAM32GB GDDR7
Thermal TDP575W
NVIDIA
GeForce RTX 5080
Price
£1,000
Perf Index
68%
Value Score
0.068
VRAM16GB GDDR7
Thermal TDP360W

GeForce RTX 5090 vs GeForce RTX 5080: In-Depth Breakdown

Performance: GeForce RTX 5090 vs GeForce RTX 5080

The GeForce RTX 5090 is dramatically faster, around 47% ahead of the GeForce RTX 5080. Both cards sit in the same broad class, well suited to 4K and high-refresh 1440p. The GeForce RTX 5090 packs 21,760 CUDA cores versus 10,752 on the GeForce RTX 5080. The GeForce RTX 5090 also has more RT cores (170 vs 84) and more AI cores (680 vs 336), strengthening its ray-tracing and AI-upscaling performance.

Price & Value

Right now the GeForce RTX 5080 starts at $1,000 GBP against $3,180 GBP for the GeForce RTX 5090. Despite being slower, the GeForce RTX 5080 offers the better performance-per-dollar (~116% better value), so budget-focused buyers should weigh it carefully. The GeForce RTX 5090 still sits about $1,181 GBP above its $1,999 GBP MSRP.

Power & Efficiency

The GeForce RTX 5080 draws just 360W versus 575W for the GeForce RTX 5090, and it also delivers more performance per watt — so it runs cooler and quieter and needs less PSU headroom.

VRAM & Future-Proofing

With 32GB against 16GB, the GeForce RTX 5090 has more headroom for 4K textures and memory-hungry creative/AI tasks where the GeForce RTX 5080's 16GB can fall short. The GeForce RTX 5090's memory is also faster — 1,792 GB/s versus 960 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 5090 or GeForce RTX 5080?

Choose the GeForce RTX 5090 if you want the most performance and can absorb the higher price. If you're optimizing for value, the GeForce RTX 5080 stretches your money further for only slightly lower performance.

Frequently Asked Questions

Is the GeForce RTX 5090 better than the GeForce RTX 5080?

The GeForce RTX 5090 is dramatically faster, roughly 47% ahead. The GeForce RTX 5080 is still worth it if value matters more than top-end frames.

Which is better for 4K gaming, the GeForce RTX 5090 or the GeForce RTX 5080?

The GeForce RTX 5090 is the better 4K option — it's comfortable at 4K and high-refresh 1440p, and its 32GB of VRAM helps with 4K textures.

Is the GeForce RTX 5090 worth the extra $2,180 GBP over the GeForce RTX 5080?

Only if you need the extra performance or features; on pure value the GeForce RTX 5080 comes out ahead.

Does the GeForce RTX 5090 have enough VRAM advantage to matter?

Its 32GB (vs 16GB) gives real headroom for 4K, heavy texture mods, and creative/AI work. At 1080p the gap matters less.

Which is better for ray tracing, the GeForce RTX 5090 or the GeForce RTX 5080?

Both handle ray tracing, but the GeForce RTX 5090 has more RT cores, giving it better ray-tracing and AI-upscaling performance than the GeForce RTX 5080.