Overclock.net › Forums › Graphics Cards › AMD/ATI › Powercolor 7870 Myst flash BIOS fail please help.
New Posts  All Forums:Forum Nav:

Powercolor 7870 Myst flash BIOS fail please help.

post #1 of 2
Thread Starter 
System spec
i5-6500 @ 5Ghz
G.Skill Ripjaws 4 3000Mhz underclock to 2917Mhz 1.35v
ASUS Z170-A unofficial 0050 BIOS for non K OC
Powercolor 7870 Myst @ 1150Mhz/1500Mhz (oc core but untouch mem) with universal waterblock and 14cm fan blowing air to VRM and VRAM (VRAM don't have heatsink , Mosfet have very tiny heatsink , other part don't have heatsink).

My card has some problem. After playing GTA V for a long time it will freeze but no BSOD (sometimes the entire screen will go red but don't have any letter like red screen of death) and come with loud buzzing noise. I am sure this is not CPU or RAM issue since I stability test for a long time. I search on youtube with "7870 buzzing noise" and found many people have the same problem.

I don't understand why my card can't control voltage at all. Try unlock voltage control and voltage monitoring on MSI AB. I can move voltage slider then hit apply but voltage that show in MSI AB or GPU-Z don't change.

Maybe VRM overheat ? So I try to reduce voltage via BIOS flashing from 1.256v to 1.15v I edit BIOS via VBE7 and flash with ATIWinflash restart then boot QLED stuck at VGA and screen don't show anything at all.

The 7870 Myst don't have dual BIOS switch and I CAN'T use HD530 on CPU because non K OC BIOS will not allow to use it. I try it but QLED sutck at VGA again and screen don't show anything at all.

I then hope that ASUS Z170-A will have something like dual BIOS or USB BIOS Flashback since I want to go back to "normal" BIOS to use HD530 again. But this mainstream boad don't have dual bios switch and USB BIOS Flashback is just a "pin" to wait for dedicate card to plug in. ASUS Manual said "USB BIOS Flashback card purchase separately".

I don't have anymore VGA and if I want to buy a cheap VGA I have to wait for 3-4 days for shipping.

Any suggestion please help.
post #2 of 2
Thread Starter 
Look like I have to buy a new VGA anyway. Just order a cheap used GT 740 2GB GDDR3 for 45$. Hopefully my 7870 Myst is not dead.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD/ATI
Overclock.net › Forums › Graphics Cards › AMD/ATI › Powercolor 7870 Myst flash BIOS fail please help.