Published on August 21, 2008 By Richard Mohler In Personal Computing
I just got a new graphic card nvidia 8800gt and installed it and it has place for extra power so I hooked it up. At first it worked fine but then all kinds of stuff happened to computer, green kind of lines and everything just quit. I thought maybe it was some programs I recently got so I uninstalled them and it still happened. So finally I removed card (which was real hot) and put old one back in and problem went away.. Does anyone know what happened and why? Also installed new power supply corsair 550 watt..
Comments (Page 1)
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on Aug 21, 2008
chances are the new vid card is bad. also, was the fan on the card working? either way, i'd take it back.
on Aug 21, 2008
Sounds like the card fried. Warranty time I think Richard. Not sure about the power supply. Will it meet the amp requirements of the 8800gt is the question. It should be able to but it might be worth tracking that one down as well.
on Aug 21, 2008
Not sure about the power supply. Will it meet the amp requirements of the 8800gt is the question. It should be able to but it might be worth tracking that one down as well.


It may not be perfect (had issues with false alarms when I built my current machine), but newer nVidia cards watch the power they're getting, and if it's not enough, they'll simply refuse to do any 3d acceleration at all. So in this case, I'd put my money on the card itself being defective.
on Aug 21, 2008
Question (8/21/2008 5:13:07 PM): I installed graphic card and everything was going along alright then suddenly nothing and when screen did appear everything just quit and there were little green kind of lines all over screen. I thought maybe it was some software I downloaded recently. So I uninstalled all software and it still did it. So I openened case and removed video card (which was extremely hot) and put old 8600gt back in and problem went away.. Was I supposed to hook up pci-e cord from power supply? There's a slot for it so I attached it. That's what it's for isn't it? Anyway let me know if 8800gt will work or should I just send it back...
Answered By Andrew M (8/21/2008 7:03:25 PM): Hello Richard, As long as you have a PCI-e port on your board and use the auxiliary power adapter that comes with your 8800gt, then you should be fine. You should also note that your power supply needs to have at least 26amps on the +12v rail. If you have any further questions please feel free to contact us. Thanks, -EVGA Tech Support Team
He didn't even answer my question. Nothing about why it was hot when I removed it..
**Also do you guys think I need the card anyway I just do some 3d rendering and no games. Tried a quadro card but some things in Vue didn't work so it went back...**
on Aug 21, 2008
So in this case, I'd put my money on the card itself being defective.


Probably right, my initial belief as well. But you never know with a power supply it may be playing a roll in this also. I would ask for a warranty replacement on the card first and if it happens again there's likely something else wrong.
on Aug 21, 2008
Richard...mine runs pretty hot.
It's best to have an empty slots worth of room in front of the fan intake opening if possible.
Also...are you getting good air flow out of the back of the card?
One other thing...my mother board has the ability to SLI 2 cards and I run 1 card.
This means I have 2 PCI-e slots...one of the slots is PCI-e 16 and the other runs at a lower speed. On mine, the faster slot is the one closest to the CPU. If your board has this configuration, you may want to verify what speed the PCI-e slot you have it installed in runs at.
on Aug 21, 2008
Hi again Richard. Contact EVGA again and ask for a return auth for warranty on this new card. Given what you said in reply #4 it's a bad card. He did also tell you something useful that the 8800gt requires 26 amps on the +12v rail. That's the line from your power supply (the 12v rail) that you plug into the "auxiliary power adapter that comes with your 8800gt".

You should be able to find the amp specs for your power supply on it's 12v rail (it may have 2 of these) and also how efficient is it? Is it an 80+ efficiency certified power supply? 80+ certified power supplies work best with the high amp demands newer graphics card have. This certification is a measure of it's capacity to continuously supply power at 550 watts x 80% would be 440 watts of continuous power output without problems. Some power supplies are only 50 - 70% efficient and are often a source of problems.
on Aug 21, 2008
Only have the one pci-e x 16 slot and it's in it. The others are just pci and pci x1 & x8..
Running hot is one thing but it completely messed computer up, green kind of lines and everything just stopped working until other card was put back in..
on Aug 21, 2008
Also do you guys think I need the card anyway I just do some 3d rendering and no games. Tried a quadro card but some things in Vue didn't work so it went back


Graphics rendering software tends to be more CPU intensive than GPU intensive. The 8800gt is designed for high frame rates in games. The hot temps are from the increased clock rates on the GPU and memory installed on the card to help achieve faster frame rates on games. I'm thinking you were probably fine with the 8600gt some others here who do Dreams and other types of graphics may have other views on this.
on Aug 21, 2008
He didn't even answer my question. Nothing about why it was hot when I removed it.


Richard, I think he did answer...

As long as you have a PCI-e port on your board and use the auxiliary power adapter that comes with your 8800gt, then you should be fine. You should also note that your power supply needs to have at least 26amps on the +12v rail


The reason your card may have been hot was that it may not have been connected to the PSU via the necessary 26amps/+12v rail, and if not, it wasn't getting enough power to run the cooling fan at optimum level. Before taking it back I would first check this to see if that's the root of your problem.

I have a 8800GT and had the same/similar issue when I first started up mine - the screen would break up into horizontal lines and then I'd get a BSOD - so I reopened the case and connected the card to another power lead (was connected to the case fan lead which has less power) and voila, everything worked as it should.

Hope this helps... the 8800GT is a better/faster card than the 8600 by far and would suit your graphic (rendering, etc) needs much better.

on Aug 21, 2008
Do I need to use adapter if my power supply already has the six pin plug marked pci-e?WWW Link
on Aug 21, 2008
I'll try other six pin connector & see what happens...Thanks everyone..
on Aug 21, 2008
if your psu has a 6-pin connector, use it. the adaptor isn't needed.
on Aug 21, 2008
Boy... do I love tech guys....especially clueless ones.

have at least 26amps


That's wrong.

use the auxiliary power adapter


Do not use the adapter. Use the 6 pin PSU plug marked PCI-e.

I guess he forgot the part that by default EVGA'S run the fan at 30% (approx. 600 RPM).

Download and install: WWW Link

Set the fan speed to 100% or whatever your ears can tolerate.

Boot into bios, make sure PCI-e port setting is set to 'Auto' 'Enabled' or '2.0' (if available)
on Aug 21, 2008
I tried other connector and it still did the same thing, this time the graffiti type lines were purple..Oh well guess I'll return it.Do you think it is worth trying another one or should I just stick with the 8600gt?  
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