The installer forgets to run power to the 7870.
Hi all
I'm in need of some help. My brothers graphics card was faulty, and so I replaced it with an old Radeon HD 7870 I had laying around which I know still works because I only took it out a few months ago after upgrading to a GTX 1070.
After installing I found that there was no signal to the monitor. I've tried a number of things, resetting CMOS, testing the two sticks of 8GB RAM, tried the 2nd PCI-E slot on the motherboard, I don't think the 750W PSU is the problem.
The only way I can get a signal is when I removed the GFX card and use the motherboards integrated graphics. I would presume that in order to get a signal I'd need to somehow get into the BIOS and disable integrated graphics and prioritise the PCI-E slot, however, how do I do that if I can't even get a signal in order to get into BIOS. I notice that even if I'm running integrated graphics with the GFX card out, I can get into the BIOS and change those settings, but as soon as I installed the GFX card again, those settings are changed back to auto?
If anyone could shed some light it would be much appreciated.
Thank you.

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