For 2021 gaming, if you’re looking a GPU, so please find at least 800-1000 MHz core clock speed. Once you see instability (IE the drivers crash), back off and you'll have your highest GPU offset. sometimes its locked and other time its doign what it is suppose to do. The problem: After overclocking memory clock, the Mem clock is locked at the min.This ensures that all modern games will run on Radeon RX 580. Rx580 clock speed 300 rx580 clock speed 300 16.