GPU comparison · 1080p benchmark
RX 580 8GB recorded 79 FPS against 76 FPS for RX 580 4GB. These are continuous 1080p benchmark averages, not predicted FPS in any particular game.
RX 580 4GB
76Benchmark FPS at 1080p- Our rating
- 44.2 / 100
- Graphics memory
- 4GB
- Released
- April 2017
- GPUsed cards tested
- 27
RX 580 8GB
79Benchmark FPS at 1080p- Our rating
- 44.8 / 100
- Graphics memory
- 8GB
- Released
- April 2017
- GPUsed cards tested
- 100
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What does this comparison mean?
The 4GB and 8GB RX 580 results differ by only 3 FPS in this workload. Twice the capacity does not imply twice the speed, but the small benchmark gap also does not measure what happens when a game exceeds 4GB.
RX 580 4GB has 4GB and RX 580 8GB has 8GB of graphics memory. Memory capacity, board dimensions, power connectors and the price of a particular used card are separate from this benchmark. Compare the exact item before deciding whether to upgrade.
The two GPUs in context
RX 580 4GB
The RX 580 4GB arrived with the April 2017 Polaris refresh. It shares the RX 580 name with an 8GB variant, but its smaller memory pool remains a material distinction when choosing a used card.
RX 580 8GB
The RX 580 8GB is a Polaris-generation Radeon introduced in April 2017. This comparison uses the 8GB variant, rather than the separate 4GB card.
Release and feature sources: RX 580 4GB source · RX 580 8GB source.
How the figures are compared
Both FPS figures come from the owner-supplied GPUsed benchmark dataset. GPUsed reports a continuous FurMark run at 1080p for its physical-card checks. The percentage compares the higher model average with the lower one using the original FPS values. Our rating uses a compressed scale, with the fastest GPU at 100; it is separate from the percentage difference. A benchmark result does not predict gaming FPS.
GPUsed reports its physical-card checks typically last 30 to 60 minutes while temperature and stability are checked. The owner supplied the model-level FPS workbook on 2 October 2026; this benchmark dataset was last reconciled 3 October 2026. Historical cards tested are separate from the number of FPS runs behind a model average. Full benchmark method.