Search: Rx 570 Bios Download. Jan 29th, 2021 01:06 PST change Functional: - Built-in timings from the developer - Quick and easy copying of timings - Timings editor - Unlock additional RX460 shaders - GPU and MEM frequency editor by default - GPU voltage Product specification, functions and appearance may vary by models and differ from country to country This is a substantial decrease. RX 580 doesn't seem to be supporting UEFI I bought a used RX 580 recently. When I power on the PC, it's all black until Windows loads. If I enable CSM in BIOS, then I see the post screen. When I check gpuz in Windows, the UEFI checkbox is ticked. I have an another GPU that works with CSM disabled, so I don't think it's the motherboard.