GPU Comparison
Select up to 2 GPUs to analyze their pricing, performance, and specifications side-by-side.
The Radeon RX 580 and Radeon R9 390X trade blows on raw performance, landing within a few percent of each other.
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Radeon RX 580 vs Radeon R9 390X: In-Depth Breakdown
Performance: Radeon RX 580 vs Radeon R9 390X
The Radeon RX 580 and Radeon R9 390X post nearly the same score in our performance index, so neither holds a meaningful raw-speed advantage. Both are best suited to entry-level 1080p gaming.
Power & Efficiency
At 185W against 275W, the Radeon RX 580 is both the lower-power and the more efficient card, making it the easier build to cool and power. Its more modern GCN 4.0 (Polaris) architecture on a GloFo 14nm process is part of why it does more with each watt.
Memory & Bandwidth
The Radeon R9 390X's memory is faster — 384 GB/s versus 256 GB/s (512-bit vs 256-bit bus) — which helps feed the GPU at 4K and with heavy textures.
Generation & Longevity
The Radeon RX 580 is roughly 2 years newer than the Radeon R9 390X (GCN 4.0 (Polaris) vs GCN 2.0), so it generally benefits from a more modern architecture and longer driver-support runway.
Which should you buy: Radeon RX 580 or Radeon R9 390X?
The Radeon RX 580 is the faster card. 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.