Is my PCI-E slot broken? Please help..

Thanks for reading this.

Basically my problem is sometimes my monitor doesn't come on when I start or restart the pc. I have to keep hard resetting until it does, sometimes 4 or 5 times later. This started happening quite recently however, this is my own built computer, and when I first put it together I had to RMA a GPU due to overheating issues which would also cause the monitor to go off. However although the overheating issue was still there, i seem to remember when the card was in the other PCI-E slot it wouldn't crash like that, but as the PCI-E was right near the bottom of the case it would be even hotter!

Anyway I got a new card back and it worked fine in the original PCE-E slot so the worries I had that also the MOBO slot might be dead were gone, however I have recently been adjusting my PC and now this has started happening, and even more worringly the computer restarts sometimes when the windows desktop first loads. I have tried the card in the other slot, which is still going to run too hot and it seemed to work without any screen issues, although I cannot be certain because like I say it doesn't always happen. I am using the computer now, with the card in the "broken" slot and it is working.

I read that a dump file is created when it restarts so I found that and am just downloading the symbols and debugging tool to read it, which I will post when I can.

Things I changed recently:

I overclocked both my GPU and CPU (the GPU first, a few weeks ago, and the cpu much more recently, Both of which have now been reset to default)

I updated my bios, which worked fine

I have also tried a number of things to fix the problem:
Reset cmos and bios
reseated ram, gpu and cpu.


Any help is much appreciated.

Thanks again