GPU Comparison
Select up to 2 GPUs to analyze their pricing, performance, and specifications side-by-side.
The Radeon RX 6800 XT is dramatically faster than the Radeon RX 6400, leading by roughly 517% in our performance index. It is also the stronger value pick here, so it's the easy recommendation if your budget allows.
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Radeon RX 6800 XT vs Radeon RX 6400: In-Depth Breakdown
Performance: Radeon RX 6800 XT vs Radeon RX 6400
The Radeon RX 6800 XT is dramatically faster, around 517% ahead of the Radeon RX 6400. That gap is enough to move it up a tier: the Radeon RX 6800 XT is comfortable at 1440p, while the Radeon RX 6400 is better matched to entry-level 1080p. The Radeon RX 6800 XT packs 4,608 stream processors versus 768 on the Radeon RX 6400. The Radeon RX 6800 XT also has more RT cores (72 vs 12), strengthening its ray-tracing and AI-upscaling performance.
Price & Value
Right now the Radeon RX 6400 starts at $175 GBP against $836 GBP for the Radeon RX 6800 XT. Because it's both faster and competitively priced, the Radeon RX 6800 XT wins on performance-per-dollar by about 29%. The Radeon RX 6800 XT still sits about $187 GBP above its $649 GBP MSRP.
Power & Efficiency
The Radeon RX 6400 pulls less power (53W vs 300W), so it's the easier card to cool and the lighter load on your PSU. The faster Radeon RX 6800 XT draws more overall but extracts more performance from each watt — plan for a sturdier power supply if you pick it.
VRAM & Future-Proofing
With 16GB against 4GB, the Radeon RX 6800 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 6800 XT's memory is also faster — 512 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 2 years newer than the Radeon RX 6800 XT, so it generally benefits from a more modern architecture and longer driver-support runway.
Which should you buy: Radeon RX 6400 or Radeon RX 6800 XT?
The Radeon RX 6800 XT is the all-round winner here — it's faster and the better value, so buy it if it fits your budget. Only consider the Radeon RX 6400 if you find it at a steep discount.