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 786% in our performance index.
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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 786% 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 and high-refresh 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.
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 7900 XTX or Radeon RX 6400?
The Radeon RX 7900 XTX is the faster card by about 786%. With live pricing limited for this pair, base your decision on the spec differences above — particularly VRAM and power draw — and check current stock before buying.