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Mobo won't boot up when I use a PCI-E 6 adapter?

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July 6, 2011 10:05:53 PM

I just got a 8800 GTS 512mb G92 core GPU and it requires a direct connector to the PSU. When I plug in the connector adapter (it converts two IDE connectors to a PCI-E 6 connector for the GPU), the computer refuses to turn on.

When I try to turn on the computer without the PCI-E 6 connector plugged in, but with the GPU in the PCI-E slot, the computer makes an extremely loud and high-pitched screeching sound that I would imagine comes from a fan(s), though I am not sure which fan. I pissed my pants as I thought my computer was going to blow up.

What could be the problem? Please help, I don't want my expensive new graphics card to go waste =P

full computer specs: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00...

Mobo: Asus A8N-LA also known as Nagami2-GL8E
full mobo specs: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00...

I am unable to find my PSU specs but it is a 300W max load and 6 years old so there's some significant capacitor aging. the mobo capacitors are also 6 years old

If your going to suggest I buy a new PSU, I want you to be sure that this problem is caused by a lack of power.
I thought about the problem being caused by the PSU, but I would think that having less than the required amount of power would still get the computer to the BIOS, albeit crashing when the OS loads. That is not the case here, where the computer just doesn't turn on to begin with

And my computer works just fine when I take out the 8800 GTS and replace it with a 7600 GT

More about : mobo boot pci adapter

a b V Motherboard
July 6, 2011 10:47:22 PM

It's a lack of power. Short of me driving to your house and swapping the power supply to test the theory, i'm confident otherwise.
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a c 264 V Motherboard
July 6, 2011 11:28:09 PM

The 8800GTS needs a 400w psu with 26a on the 12v rails.

Look on your current psu. It should have a plate which documents it's power capabilities.

Without sufficient power, you will get your symptoms.

You should be able to get a quality 450w psu for <$50. Stronger is not a negative either.
Look to Antec, XFX,Corsair, Seasonic, or PC P&C as quality units. DO NOT go cheap on a psu.
Here is a 450w XFX unit:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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a b V Motherboard
July 7, 2011 1:22:33 PM

10ftcoke said:
I am unable to find my PSU specs but it is a 300W max load and 6 years old so there's some significant capacitor aging. the mobo capacitors are also 6 years old

If your going to suggest I buy a new PSU, I want you to be sure that this problem is caused by a lack of power.
I thought about the problem being caused by the PSU, but I would think that having less than the required amount of power would still get the computer to the BIOS, albeit crashing when the OS loads. That is not the case here, where the computer just doesn't turn on to begin with

And my computer works just fine when I take out the 8800 GTS and replace it with a 7600 GT


Sounds like the power supply is shot.
System should start and function, though I wouldn't go gaming or running benchmarks for any extended period of time.
Dell D 4700
P4 2.8
2 sticks ram
1 HD
1OD
FD
PCI wireless card
305w/22a psu
8800GTS 512
Pulls around 310 watts from the wall running the Furmark benchmark , around 170w surfing the net.
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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