GPU Comparison
Select up to 2 GPUs to analyze their pricing, performance, and specifications side-by-side.
The Radeon RX 7900 XTX is dramatically faster than the Radeon RX 6400, leading by roughly 833% in our performance index. The Radeon RX 6400, however, delivers more performance per dollar — $948 EUR cheaper.
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Radeon RX 7900 XTX vs Radeon RX 6400: In-Depth Breakdown
Performance: Radeon RX 7900 XTX vs Radeon RX 6400
The Radeon RX 7900 XTX is dramatically faster, around 833% ahead of the Radeon RX 6400. That gap is enough to move it up a tier: the Radeon RX 7900 XTX is comfortable at 4K with upscaling and native 1440p, while the Radeon RX 6400 is better matched to entry-level 1080p. The Radeon RX 7900 XTX packs 6,144 stream processors versus 768 on the Radeon RX 6400.
Price & Value
Right now the Radeon RX 6400 starts at $10 EUR against $958 EUR for the Radeon RX 7900 XTX. Despite being slower, the Radeon RX 6400 offers the better performance-per-dollar (~898% 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 7900 XTX is trading below its $999 EUR MSRP — a genuine deal.
Power & Efficiency
The Radeon RX 6400 pulls less power (53W vs 355W), so it's the easier card to cool and the lighter load on your PSU. The faster Radeon RX 7900 XTX draws more overall but extracts more performance from each watt — plan for a sturdier power supply if you pick it.
VRAM & Future-Proofing
With 24GB against 4GB, the Radeon RX 7900 XTX 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 7900 XTX's memory is also faster — 960 GB/s versus 128 GB/s (384-bit vs 64-bit bus) — which helps feed the GPU at 4K and with heavy textures.
Which should you buy: Radeon RX 6400 or Radeon RX 7900 XTX?
Choose the Radeon RX 7900 XTX 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.