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Installed new graphics card (gtx660)

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April 12, 2014 11:48:31 AM

I installed a new graphics card (gtx660) and now my PC would just hang at "verifying dmi pool data" I have done the basics of clearing the CMOS, trying different HDD's, making sure the first boot is HDD, trying to access the the bios menu with the graphics card in though it just freezes. I can't use my HDD when I revert to integrated graphics.

I'm sure there is more I have done but I would really appreciate your help.

System specs:
OS: Windows 8.1
CPU: fx 4300 (4core)
12gb ram ddr3
MB: GA-78LMT-USB3
Gpu: gtx660 2gb
750watt psu corsir
1tb HDD


Sorry if I have missed any specs

-Kirk Purdy
a c 98 U Graphics card
April 12, 2014 12:32:42 PM

this may seem silly, but do you have the power connectors plugged in?

best thing to do would be to boot up using integrated gpu, then make a backup of your files, then reinstall windows
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a c 564 U Graphics card
April 12, 2014 12:34:49 PM

What is your GA-78LMT-USB3 motherboard revision level? GIGABYTE's website shows there is a rev. 5.0 so that model has undergone many revisions during its model life.

Are you using the latest motherboard BIOS Version for your specific motherboard revision?
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April 12, 2014 12:54:10 PM

My rev is 4.1 and I will of course see if my bios needs to be updated I already had a gtx 660 in my PC that worked perfect but it died and I got it replaced with this one.
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April 12, 2014 2:26:10 PM

Tried all that and yet nothing the same thing keeps happening
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a c 564 U Graphics card
April 12, 2014 2:28:33 PM

When your original GeForce GTX 660 died it may have damaged your motherboard.
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April 12, 2014 2:29:55 PM

ko888 said:
When your original GeForce GTX 660 died it may have damaged your motherboard.


I thought that so I got a new motherboard and yet the same thing happened
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Best solution

a c 564 U Graphics card
April 12, 2014 2:51:22 PM

Then the replacement GeForce GTX 660 has a problem.

Borrow a different discrete graphics for troubleshooting purposes.
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