RX480 Won't display on PCIE 3.0x16 but will work on the PCIE 2.0x4 Slot?

IpDan

Commendable
Oct 14, 2016
11
0
1,520
Hey guys,

First time poster long time lurker :)

Recently put together a PC using

Motherboard MSI B85-G43 GAMING
and an MSI RX480 8gb Card

PSU is a VS750

It's all up and running but for some reason whenever I plug the card *using an extender as the case requires one) into the PCIE3.0 x16 Slot - There is no display, i've checked the connection multiple times, ensured it was plugged in correctly - The card turns on, lights up, fans spin and the whole works but there is no display.

I then plug it into the PCIE2.0 x4 speed slot and I will have a display as I should.

Can anyone think of any reason why this could be happening? Anything I could possible troubleshoot?

Thanks!
*Was unsure if this was a motherboard or GPU question*


Further Update -

So I decided to reset the CMOS and then plug the GPU into the top slot - Much to my excitement, I got a display! However the PC was really slow, everything was, even the BIOS would load one character at a time. Tried to reinstall drivers, tried to reset to optimised defaults but it was incredibly slow and unusable.

Not only that, but when I restarted my PC, it would SOMETIMES have a display and sometimes not. I really have no idea what was going on...;

For now i've just plugged it back in the second slot and things seem to be running fine again, however a little disappointed i'm not getting as much out of the GPU as I would like, I eventually planned to crossfire as well however with the issues im having with the top slot it seems like it wont really be possible...

Happy to continue trying any other ideas anyone may have but to me, it's looking like the motherboard is the culprit here...
 

IpDan

Commendable
Oct 14, 2016
11
0
1,520


Unfortunately doesn't seem to be the case as it works fine in the second slot. Thanks for answering though.
 


I'm not saying its the case. I'm saying there could be something wrong with the extender not working correctly in a 16x slot. which is why you would have to pull the motherboard out of the case. to try to use the card without the extender.

an extender card basically makes more electrical signal losses due to extending the traces, having two connectors for the signal to go though (mb to extender then extender to card).

 

IpDan

Commendable
Oct 14, 2016
11
0
1,520


Hi there, my apologies I didn't mean it was the 'case' itself - in this sentence I meant doesn't seem to be the 'issue' but anyway, I believe you may be correct.

I tried again and it seemed to work better without the extender (not sure what happened the first time) and has been stable for a few hours now. Have read into the cable that came with my case (Thermaltake P5) and it seems many people have been having the same issue with the riser cable.

Thanks so much, have picked your answer.
 

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