PC Won't Power On With PCIE Cables Plugged Into Video Card

Johnnieblaze

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Oct 7, 2014
3
0
4,510
Not sure what is going on exactly but my PC (custom Build) will no power on if my graphics card is plugged in via the 2x6 pin PCIe cables.

Here's the breakdown. I had a Saphire r9 280x which ran fine, no issues. I went to a EVGA GTX 670 which I have water cooled o nan open loop along with my CPU. I hooked everything up last night after cutting my tube lengths and what not. It powered on fine I installed the Gforce experience and updated the drivers for the GTX 670. I also installed Precision X from the EVGA site an minimally tweaked the GPU performance. After I restarted it it powered on like normal but once windows booted up it powered down like I unplugged it.

It would not power on unless I unplugged the PCIE cables from the graphics card. I run a I7 3930k on an AsRock Extreme 9 LGA 2011 board so I kinda need a GPU.

If I unplug the graphics card and power it on, I can then plug the card back in and then reset the motherboard via it's reset button and it will run fine. If I restart the machine or let it sleep it will not power back on or wake up and I have to repeat the unplugging process.

I'm thinking it is my PSU which is a Seasonic 850x Gold but not quite convened yet. The cables are fine and I can jumper the PSU and it will power on fine as well which is how I filled up my loop. Any thoughts or comments would be helpful

Specs (I'm at work so this is off the top of my head)

CPU - i7 3930k
motherboard - Asrock Extreme 9 LGA 2011
RAM - Gskill Ripjaws
Corsair SSD and several other 7200 HDD's and 1 green HDD
XSPC water pump and blocks - 1x360mm rad, 1x120mm rad
PSU - Seasonic 850x Gold
GPU - EVGA GTX 6670 FTW
 

Johnnieblaze

Reputable
Oct 7, 2014
3
0
4,510
You know as I was typing this up I thought about that. To answer your question, no, I didn't which was stupid of me I know better but anyway. I'll do that once I get off work here and restart and see if that helps. I left it powered on just turned off my displays so I can remove it pretty easy I think (hope).

Thanks for the link, I'll keep you posted.
 
some of the older 670 cards the vendors were caught over volting them to keep them running in over clock mode. nvidia caught a few vendors doing this. when the cards end up in system they will cause no post at cold post or no post on reboot as they pull to much currant and the mb safty kicks in. you can check to dee if your card is one of them and or check that your mb bios is up to date to rule out a bios bug..also check the firmware on the card.
http://www.tomshardware.com/news/MSI-GTX-660-670-overvolting-PowerEdition,18013.html
http://forums.anandtech.com/showthread.php?t=2263098
 

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