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Installing new video card, computer won't boot

Last response: in Graphics & Displays
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August 15, 2013 11:56:07 PM

Today I installed a new psu, upgrading from a 300w to a 450w. I also bought a Radeon HD 6670 graphics card, but when I inserted it, it wouldn't boot up. My current card is an Intel g45/43, which I think is integrated and therefore means I shouldn't remove it (also I didn't even see it when I opened up the case). The instructions say that I should wait until after installing the card to add the new drivers, I'm assuming I can't uninstall the old drivers since that card is still in there. Have I done something wrong or am I missing something?

I don't know how relevant any of this is but my psu has a switch on the back that goes between 115 and I think 250, but my computer will only boot if it's on the 115. It's an Antec VP450, if that matters. And for some reason my wired keyboard has stopped working and I had to plug in a wireless one. I appreciate any help!
August 16, 2013 12:05:13 AM

normally a 6670 would run on a 300 watt PSU (my brothers runs on a 260 watt)
i dont think its the PSU.
does the computer run with the integrated graphics with the new PSU?
August 16, 2013 12:18:23 AM

aidanklenk said:
normally a 6670 would run on a 300 watt PSU (my brothers runs on a 260 watt)
i dont think its the PSU.
does the computer run with the integrated graphics with the new PSU?


With the new psu, as long as the new Radeon card isn't in it, then it will boot up and run as normal. But I've twice tried putting the new card in, and both times there was no display. I tried both the old HDMI output and the new one from the card, but neither worked. And I think the fan would start both times, but the light on top of the case that goes on when the computer is on didn't light up.
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August 16, 2013 12:24:54 AM

well, try and hard reset, as in, hold the power button in for 10 seconds when the fans are on until it turn completely off. then wait for the fans to go off, then push the power button again and see if that changes anything.

make sure you are putting the graphics card in all the way, too. be firm with it, but don't overdue it. i think my brother actually had the same problem.
August 16, 2013 2:07:01 PM

I tried that, didn't work. And it makes a pretty secure click sound when it's seated properly, so I'm pretty sure the card is in all the way. Any other suggestions?

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August 17, 2013 9:16:15 AM
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the thing is, a lot of people have problems with first time set up on a 6670.
i know that because my brother did, and if you google it, it is all over the internet.
from my understanding, if you just play with it for a while, it should work.

now, does the graphics card spin up when you turn the computer on?
February 11, 2014 7:40:09 PM

graphics card fan spins but still there is no display..
!