Black screen system crash.

[PegasusOne]

Ok, so i've just installed a new RX580, up from a HD6790.

POST is fine, start up is fine, perusing the internet and desktop is all fine. Load up a game however and within about 15 seconds the screen goes black with 'no signal' and the only way to restart is with the power switch at the back. When I upped the graphics it seems to crash sooner.

Since reset and power switch are unresponsive. I presume that something on the motherboard is unresponsive too because of this. All the fans and lights are still powered and spinning.

I've swapped GPU out with a RX560 and the same issue occurs, so it's not the card.
I think it is somthing to do with either the PSU or motherboard. Both the above cards draw 150w of power either through an 8 or 6 pin PCIE and possibly some thorugh the PCIe port as well. The 6790 had 2x6 pin connectors and didn't miss a beat for 7 years but I don't think it took more than 75w total.


I have a Corsair GS800 800W PSU.
Gigabyte GA-970A-UD3 Motherboard (does not have UEFI BIOS)
All system components are about 7 years old.

I've looked at the +12volt and +5 volt rails and the seem fine although I can't really monitor them when it crashes. So bascially, when the GPU comes under heavy load the system falls over. PSU or Mobo or somthing else?

Thanks
Peg

 

[mrbazmondo]

I upgraded from a HD6850 to a RX580 and have a 600W PSU, i7-3930K and 32GB on a GA-X79-UD3.
Your 800W PSU should be plenty powerful enough to drive it.

Did you run the AMD clean uninstall tool to clear out all the old stuff before installing the new drivers?
https://support.amd.com/en-us/kb-articles/Pages/AMD-Clean-Uninstall-Utility.aspx

Check your BIOS is up to date, or at least tell it to load optimised defaults + tweak what you need to. Sometimes the setting can get corrupted a little when changing hardware and that can sort it out.

Try running a GPU stability test program.