GPU Comparison
Select up to 2 GPUs to analyze their pricing, performance, and specifications side-by-side.
On raw speed the Radeon RX 6600 comes out dramatically faster — about 143% ahead of the Radeon RX 6400. But the Radeon RX 6400 is the better value, undercutting it by $376 GBP for the performance you get.
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Radeon RX 6600 vs Radeon RX 6400: In-Depth Breakdown
Performance: Radeon RX 6600 vs Radeon RX 6400
The Radeon RX 6600 is dramatically faster, around 143% ahead of the Radeon RX 6400. That gap is enough to move it up a tier: the Radeon RX 6600 is comfortable at 1080p, while the Radeon RX 6400 is better matched to entry-level 1080p. The Radeon RX 6600 packs 1,792 stream processors versus 768 on the Radeon RX 6400. The Radeon RX 6600 also has more RT cores (28 vs 12), strengthening its ray-tracing and AI-upscaling performance.
Price & Value
The Radeon RX 6400 currently lists from $174 GBP, $376 GBP less than the Radeon RX 6600 at $550 GBP. Despite being slower, the Radeon RX 6400 offers the better performance-per-dollar (~30% better value), so budget-focused buyers should weigh it carefully. The Radeon RX 6600 still sits about $220 GBP above its $330 GBP MSRP.
Power & Efficiency
At 53W against 132W, the Radeon RX 6400 is both the lower-power and the more efficient card, making it the easier build to cool and power.
VRAM & Future-Proofing
The Radeon RX 6600 carries 8GB versus 4GB on the Radeon RX 6400. The extra 4GB helps at 4K, with high-resolution texture packs, and for content-creation or local-AI workloads that exhaust smaller buffers. The Radeon RX 6600's memory is also faster — 224 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 or Radeon RX 6400?
Choose the Radeon RX 6600 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.