GPU Comparison
Select up to 2 GPUs to analyze their pricing, performance, and specifications side-by-side.
On raw speed the Radeon RX 590 comes out dramatically faster — about 43% ahead of the Radeon RX 6400.
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Radeon RX 590 vs Radeon RX 6400: In-Depth Breakdown
Performance: Radeon RX 590 vs Radeon RX 6400
The Radeon RX 590 is dramatically faster, around 43% ahead of the Radeon RX 6400. Both cards sit in the same broad class, well suited to entry-level 1080p. The Radeon RX 590 packs 2,304 stream processors versus 768 on the Radeon RX 6400.
Power & Efficiency
At 53W against 225W, the Radeon RX 6400 is both the lower-power and the more efficient card, making it the easier build to cool and power. Its more modern RDNA 2 architecture on a TSMC N6 process is part of why it does more with each watt.
VRAM & Future-Proofing
The Radeon RX 590 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 590's memory is also faster — 256 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 4 years newer than the Radeon RX 590 (RDNA 2 vs GCN 4.0 (Polaris)), so it generally benefits from a more modern architecture and longer driver-support runway.
Which should you buy: Radeon RX 6400 or Radeon RX 590?
The Radeon RX 590 is the faster card by about 43%. 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.