Pci express slot problem or something else?

Evga Geforce gtx 550 ti (fermi) fpb 01g-...
July 18, 2012 at 16:45:27
Specs: Windows 7, I7 3300/8gb
I bought an ibuypower PC and have only had it two months. The graphics card stopped working (no signal on monitor) so I troubleshot it with a tech support guy on the phone and determined it was the graphics card. Got a new graphics card in today and plugged it in with the same problem. So I got on the phone again went through the same process, except this time I tried another graphics card from an old computer with no luck. So we determined it was the PCI express slot. The on board video still worked and the monitor seemed to work fine. So I'm sending the computer back for repairs at no cost to me other than shipping.

Now an issue that makes me question this is when I plugged my old graphics card into my old computer and tried to start it up I got no signal again. Tried an old monitor with the same issue. Is it possible the pci slot in the computer has caused a problem with the graphics cards.


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#1
July 18, 2012 at 18:36:36
Did you choose a decent name brand power supply or did you simply go with the iBuypower default? If you went with the default, that is most likely the problem, not the card, not the PCIe slot. And if your "old computer" doesn't have a decent power supply, there's no way it will be able to handle a 550 Ti. Are you connecting the 6-pin PCI-e plug to the card?

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#2
July 18, 2012 at 18:50:20
It was a prebuild PC and it has the basic power supply. I plugged the old graphics card that I tested in the IBuypower PC back into my old PC and it did not get a signal to the monitor after it was plugged into the Ibuypower PC. And I did have the 6-pin PCI-e plugged into the card.

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#3
July 18, 2012 at 18:55:33
Did you unplug both computers prior to moving the cards around?

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#4
July 18, 2012 at 18:59:18
I did unplug the cord from the power supply. I took the old computer out of storage and the Ibuypower was unplugged previously from troubleshooting.

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#5
July 18, 2012 at 19:45:30
"it has the basic power supply"

Most likely it's no-name garbage. We need the specs for both PSUs - make/model, wattage, amperage ratings on the +3.3v, +5v & +12v rails.


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#6
July 18, 2012 at 20:00:27
All I know about the power supply is the watts which is 600W. I have searched Ibuypower.com and newegg.com where I bought the computer and it only says standard 600w power supply.

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#7
July 18, 2012 at 21:11:28
You have to open the cases of both the iBuy PC & your old PC, then get the model info & specs off the label on the side of the units. 600W tells us nothing. There are garbage 600W PSUs that sell for about $20 & top quality 600W PSUs that sell for over $100, plus all sorts in between. I have some experience with both iBuypower & Cyberpower PCs. Their standard PSUs are generally cheap crap. You should have bought directly from iBuy rather than Newegg, used the "Configuator", & selected a Corsair or Thermaltake PSU. Also, if you open the iBuy case & the PSU label isn't visible, the PSU is probably mounted upside-down. The fan should be on the bottom.

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#8
July 19, 2012 at 05:34:54
I packed up the IBuy but I will get it out later today when I have some time. But first I want to know how likely it is that the power supply would be the problem. The rest of the PC would work except for the graphics card? And that also makes me wonder why all of the sudden my old graphics card on the old computer will not get a signal to the monitor. That old computer worked fine for 5 years and now all of the sudden Im not getting a signal from the graphics card.

Since I planned to upgrade the PSU in the future anyway. Would I be better off getting a new PSU and trying that instead of sending it off for repair, when that could take a month?


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#9
July 19, 2012 at 14:36:47
It is certainly possible that the cheap power supply may be putting out more than say 12 Volts on the 12 Volt rail(s) by greater than the acceptable 5% allowable, especially when you are trying to pull more amperage out of the 12 Volt rail than it is capable of safely delivering (normally I would expect it to deliver less voltage under heavy draw, but cheap is cheap). If it is, then that could actually have damaged your Video Card.

You have to be a little bit crazy to keep you from going insane.


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