GPU Comparison
Select up to 2 GPUs to analyze their pricing, performance, and specifications side-by-side.
On raw speed the Radeon RX 6400 comes out noticeably faster — about 17% ahead of the Radeon R9 380X.
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Radeon RX 6400 vs Radeon R9 380X: In-Depth Breakdown
Performance: Radeon RX 6400 vs Radeon R9 380X
The Radeon RX 6400 is noticeably faster, around 17% ahead of the Radeon R9 380X. Both cards sit in the same broad class, well suited to entry-level 1080p.
Power & Efficiency
At 53W against 190W, 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.
Memory & Bandwidth
The Radeon R9 380X's memory is faster — 182 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 7 years newer than the Radeon R9 380X (RDNA 2 vs GCN 3.0), so it generally benefits from a more modern architecture and longer driver-support runway.
Which should you buy: Radeon RX 6400 or Radeon R9 380X?
The Radeon RX 6400 is the faster card by about 17%. 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.