AMD Rig Wont Work Properly With R9 290 Plugged Into X16 PCI-E Slot

Charliekenney23

Reputable
Jun 22, 2015
10
0
4,510
To start of, here are my specifications...
CPU - 8350 Black Edition
GPU - R9 290 Tri-X OC 4GB
MOBO - Asus M5A97 R2.0
PSU - EVGA 750w 80+ Gold

So I've had this PC since early this June (I'm out of my warranty period), and it hasn't had any significant problems. When I first assembled my build, I found my R9 290 did not work in my top PCI-E slot, properly at least. I thought nothing of this, as I had no ambition to expand onto a crossfire setup, nor did I know anything about PCI-E bandwidth. So uninformed as I was, I thought nothing of it and switched my GPU to the working x4 bandwidth slot. Having just purchased a 3440x1440 resolution monitor, I've noticed my thermal output spiking up a bit in my mid-size NZXT S340 chassis. I decided to have another go at seating the GPU in the x16 slot as it would allow more airflow to the intake fans and would certainly keep my card cooler.

The last week or so I have been putting in time studying my issue. It seems there is a bit of luck involved as to whether it will work or not. There are 3 ways this goes: A- the computer will boot up until it gets to the black screen just before the blue loading screen on Windows 10, my monitor will then tell me that it has no signal and my RGB Keyboard and Mouse which have a dynamic rainbow color setting come to a complete stop leading me to believe that the system itself has frozen; B- the computer will boot up and all the way into windows, when moving the mouse fully at a mere 4000dpi the mouse hiccups, and so does my RGB Keyboard and mouse, this lag even leads to a complete freeze similar to scenario A but the monitor is still on and shows signal; Part C- The computer will boot up and into windows completely with no apparent lag but scores the same Cenibench score as the card does in the x4 interface slot. Additionally the computer can freeze when I leave it idle and/or when I wake it up from sleep. Weird, to say the least.

Can't decide what the issue is, to be honest, it doesn't really sound like it is a motherboard problem to me, because if that port was short circuited, it wouldn't work at all. So, what the hell could it be? Lol.

My warranty has expired but ASUS has offered to take a look at it, at the expense that I send it into repair for up to a month, which I'm not to fond of, as it is my only desktop computer.

*****Some things to note*****
-I'm 17 years old and in college, I cannot afford to buy a new motherboard while the potentially defective other one is sent out off to ASUS
-My system wattage is at most an estimated 550w considering the: GPU @ 250w, CPU @ 125w, Mobo @ 70w and at most 75w of an AIO Kraken x61, 3 HDDs and 6 fans (including the ones on the rad); there is no way I am overloading my PSU.
-My Bios and all drivers are up to date and I have reinstalled them just for good measure.
*************************

Thanks for your time,
Charles