GPU Comparison
Select up to 2 GPUs to analyze their pricing, performance, and specifications side-by-side.
The Radeon RX 6600 XT is dramatically faster than the Radeon RX 6400, leading by roughly 186% in our performance index. The Radeon RX 6400, however, delivers more performance per dollar — $328 GBP cheaper.
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Radeon RX 6600 XT vs Radeon RX 6400: In-Depth Breakdown
Performance: Radeon RX 6600 XT vs Radeon RX 6400
The Radeon RX 6600 XT is dramatically faster, around 186% ahead of the Radeon RX 6400. That gap is enough to move it up a tier: the Radeon RX 6600 XT is comfortable at 1080p, while the Radeon RX 6400 is better matched to entry-level 1080p. The Radeon RX 6600 XT packs 2,048 stream processors versus 768 on the Radeon RX 6400. The Radeon RX 6600 XT also has more RT cores (32 vs 12), strengthening its ray-tracing and AI-upscaling performance.
Price & Value
Right now the Radeon RX 6400 starts at $174 GBP against $502 GBP for the Radeon RX 6600 XT. Despite being slower, the Radeon RX 6400 offers the better performance-per-dollar, so budget-focused buyers should weigh it carefully. The Radeon RX 6600 XT still sits about $123 GBP above its $379 GBP MSRP.
Power & Efficiency
The Radeon RX 6400 draws just 53W versus 160W for the Radeon RX 6600 XT, and it also delivers more performance per watt — so it runs cooler and quieter and needs less PSU headroom.
VRAM & Future-Proofing
With 8GB against 4GB, the Radeon RX 6600 XT 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 6600 XT's memory is also faster — 256 GB/s versus 128 GB/s (128-bit vs 64-bit bus) — which helps feed the GPU at 4K and with heavy textures.
Which should you buy: Radeon RX 6600 XT or Radeon RX 6400?
Choose the Radeon RX 6600 XT 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 only slightly lower performance.