Question No video output without CSM enabled on RX 580 8GB Dual OC Asus

[AlexxDoesTech]

Hey guys, so i got a bit of an issue.

Recently got a RX580 for a bargain to replace my trusty old GTX 970, needed a bit more vram and such and such. Anyways my problem is that i got no video output at all on first install, i tried taking it out and putting it in again, such and such. Anyways i remembered that i have an iGPU so i plugged into that, went into the uefi settings and tinkered a bit, eventually enabling csm and well.. that fixed it. But i'd like to disable csm to shave a few seconds of boot time, so i wonder if theres a trick to this? I tried updating the bios but the flasher complained about a mismatch in the SUBSYSTEM ID, and i don't wanna brick my card by force flashing so I thought I'd give a go at asking you guys, thanks!

(I am sure it is the graphics card, something about its handling of UEFI, since the GTX 970 worked perfectly)

Specs :
ASUS RX 580 8GB Dual OC
Lenovo ERAZER X310 Desktop (OEM motherboard)
16gb DDR3
Intel i5-4460

 

[PiersPlowman]

Speaking as an owner of an RX480, Polaris GPUs absolutely do support UEFI and do not need CSM to function.

...unless they have been modified in some way. Is there a custom BIOS on the card? Was it used by a cryptominer?

If that is the case, you will have to track down the correct BIOS and flash it accordingly.

 

[AlexxDoesTech]

Speaking as an owner of an RX480, Polaris GPUs absolutely do support UEFI and do not need CSM to function.

...unless they have been modified in some way. Is there a custom BIOS on the card? Was it used by a cryptominer?

If that is the case, you will have to track down the correct BIOS and flash it accordingly.

Thanks man! Ill try today to find the right bios.