24 Hours after installing incompatible GPU, 6pin fries as does sound card in PCI-e under GPU slot

columbia93

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Mar 17, 2012
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10,510
I have an older computer (Built 2008) with an evga 8800 gts GPU that was sometimes leaving images from pull-down menus but no problems in game. When my 3 yr old Seagate HD started going bad, I decided it would be a good time to RMA the GPU as well. 2 weeks later I get both pieces back but the HD is 6.0 and refurbished and the GPU is GTX 750 Ti. (MoBo Gigabyte GA-P35-DS3L, Intel Q6700, etc.)

I contacted evga via email and they said it would be incompatible and to contact tech support about how to replace it. I contacted tech support by phone and they said the card wouldn't be a problem in my current system.

I went ahead and installed the OS and 8 years of updates, which took from Friday evening until Sat evening. When a lightening storm moved into the area, I turned off my computer (which I usually keep on 95% of the time) just as a precaution. As an aside, it is plugged into an APC backup battery w/surge. Please note that lightening did NOT strike. I just turn off the computer now and then when the storm looks particularly electric just in case.

When I turned the computer on the next morning, it went through the BIOS screen and then to the black screen saying it couldn't find the OS and the option to insert OS Disc, Safe Mode, etc. I chose the "Last Known Good Configuration" option. It started to work and then it just faded off. I rechecked all the power cables, turned it back on and, it started then faded off. I then went inside the PC to check that those cables were all tight and again, it started then faded off. Then it didn't start at all. I switched around outlets - nothing.

I had an old PSU so I swapped it out and it still wouldn't power up, regardless the outlet. I bought a new MoBo battery. Nothing. I bought a new PSU, just in case the older PSU was bad and still no power, regardless the outlet.

Prior to returning the GPU and HD, I hadn't had any issues with my PC. It kept time/date and, other than the small issue with the GPU, games played fine, etc. When the HD began having issues - I spent two weeks getting off as much stuff as I could before it finally was kaput - I wasn't too concerned as it was a 3 year old (new)Seagate that had replaced a bad 4 year old Seagate. I've read they tend to have a lifespan of 1-3 years so I didn't see that as being unusual.

In light of not having any issues prior to replacing old parts with incompatible new parts, it seems likely to me that the GPU might be the root of the problem and has rendered my MoBo useless. While I need to talk with evga again (just got new PSU today so was waiting to see if it was the cause), it would be helpful if I could go into the conversation with an idea of what might have happened as evga will likely want to take themselves out of the equation. Additionally, if there IS any way the HD could fry the MoBo, that would also be helpful.
 
No.

Last night I finally figured out what is wrong - was trying to isolate one thing and it's two.

[Rereading my original post, I realized I misspoke about the new PSU, which did start - too much typing and not enough proof-reading!]

It wasn't until long after I posted here and was contemplating the whole sorry mess that I remembered the new PSU oddly didn't have a 6pin for a video card (so I didn't have it installed), and that got me thinking. I put the old PSU back in, along with the new GPU, and it didn't start so figured it had to be the GPU. Poked around at the PSU cables and discovered that one of my 8pins is actually a 6+2 so I hooked it up just to check if it would start. It did so I installed the sound card and it wouldn't power up. I've determined the 6pin and sound card are now fried AFTER installing GPU.

So yes, after the initial reinstall a few weeks ago, the computer ran for 24 hours. (In actuality, it probably ran 12 hours or less because it was in sleep mode overnight.) BUT....I now have a fried 6pin that was in the video card and the sound card in the PCI just below the GPU is also fried. There was nothing wrong with the sound card prior to the GPU install. Because the time "window" is so small (24 hours from install and simultaneous failures) AND the GPU is involved via direct & proximity, it seems entirely probable that the GPU, compatible or not, is what created a problem with the 6pin and PCI card. When something goes from working to not working, you have to look at the variables, especially if it is more than one thing that went bad. If it were just the sound card, I would understand. Sound card and 6pin - something else is going on.

Because I use this PC as a TV/Recorder (WinTV/Hauppauge), not having that sound card is weighing on my mind. However, my biggest issue right now is the video card because I fear this will happen again - and I have no more 6pins! I will likely be unable to replace the sound card - MoBo/CPU stated above, as well as Vista64 - and cannot afford the several hundreds of dollars to build a new system w/OS. [Vista might have some problems (I've had it for 7 years) but really not looking forward to having to install Win 8!] I'd like some feedback regarding the above so I'll be better informed when EVGA calls me back.

Thx.

 

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