GPU Comparison
Select up to 2 GPUs to analyze their pricing, performance, and specifications side-by-side.
On performance, the Radeon RX 580 and Radeon RX 6400 are effectively a dead heat — under a few percent apart. The Radeon RX 6400, however, delivers more performance per dollar — $139 EUR cheaper.
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Radeon RX 580 vs Radeon RX 6400: In-Depth Breakdown
Performance: Radeon RX 580 vs Radeon RX 6400
The Radeon RX 580 and Radeon RX 6400 post nearly the same score in our performance index, so neither holds a meaningful raw-speed advantage. Both are best suited to entry-level 1080p gaming. The Radeon RX 580 packs 2,304 stream processors versus 768 on the Radeon RX 6400.
Price & Value
Right now the Radeon RX 6400 starts at $10 EUR against $149 EUR for the Radeon RX 580. Despite being slower, the Radeon RX 6400 offers the better performance-per-dollar (~1352% better value), so budget-focused buyers should weigh it carefully. The Radeon RX 6400 is trading below its $159 EUR MSRP — a genuine deal. The Radeon RX 580 is trading below its $229 EUR MSRP — a genuine deal.
Power & Efficiency
The Radeon RX 6400 draws just 53W versus 185W for the Radeon RX 580, and it also delivers more performance per watt — so it runs cooler and quieter and needs less PSU headroom. Its more modern RDNA 2 architecture on a TSMC N6 process is part of why it does more with each watt.
VRAM & Future-Proofing
With 8GB against 4GB, the Radeon RX 580 has more headroom for 4K textures and memory-hungry creative/AI tasks where the Radeon RX 6400's 4GB can fall short. The Radeon RX 580's memory is also faster — 256 GB/s versus 128 GB/s (256-bit vs 64-bit bus) — which helps feed the GPU at 4K and with heavy textures.
Generation & Longevity
The Radeon RX 6400 is roughly 5 years newer than the Radeon RX 580 (RDNA 2 vs GCN 4.0 (Polaris)), so it generally benefits from a more modern architecture and longer driver-support runway.
Which should you buy: Radeon RX 580 or Radeon RX 6400?
Choose the Radeon RX 580 if you want the most performance and can absorb the higher price. If you're optimizing for value, the Radeon RX 6400 stretches your money further for near-identical performance.