Strange problem detected in nvidia quadro fx 3800

[Haris Khan]

Hello, i bought a nvidia quadro fx 3800 a day ago. i plugged it in my computer and was expecting to get some display instead my system shuts down as soon as i turned it on. System remain on for few seconds without any kind of display. it just turns on and all the other circuits run but no display and then it shuts down. Well i became worried and checked what was the root of the problem.As soon as i downgraded my processor from 3.0 core 2 duo to 1.8 i got display as well as window also loaded. But when i again upgraded it back it went again into the no display state meaning computer remained on without any kind of display not even the hp logo can't be seen which appear when we switch on the computer and then it shut down.
My System is:
hpxw4600 work station
core 2 duo e8400 3.0 ghz
4 gb ram
475 w psu(you can see the complete work station psu and other specs easily on google)
Now my question is what is happening i know it's not my e8400 fault as it run well with other cards but why quadro fx 3800 is conflicting

 

[CraigN]

Do you have the PCI-E power pin from the power supply connected to the front of the Quadro FX 3800? If not, that could be causing problems.

Also, the minimum recommended PSU is 450W for the FX 3800. You could be running into the upper limit of your workstation's power supply with that card, which could be why you aren't getting anything displayed when you plug in the FX 3800 with your CPU clock not down-clocked.

 

[Haris Khan]

Do you have the PCI-E power pin from the power supply connected to the front of the Quadro FX 3800? If not, that could be causing problems.

Also, the minimum recommended PSU is 450W for the FX 3800. You could be running into the upper limit of your workstation's power supply with that card, which could be why you aren't getting anything displayed when you plug in the FX 3800 with your CPU clock not down-clocked.

I had connected the pci-e which i think you are referring to six pin power cable from power supply in to graphic card back where there are six black holes.Rest what you said i don't understand i never overclocked my cpu but even if it is how come it cause a problem. MY power supply is 475 watts which is more than enough for it to run it run other cards fantastically of course those cards that don't require great power than my psu limit. And what did you mean by " You could be running into the upper limit of your workstation's power supply with that card"

 

[CraigN]

What other cards have you used in that system? Just curious.

What I generally mean, is the most you really want to tax your PSU is 90% of it's max throughput. You're pushing more than that on a 475W PSU, so the fact that it's booting up on a 1.8 Core 2 duo and your FX 3800 might mean that the 3.0 Ghz Core 2 Duo + the FX 3800 is more than the PSU can handle, but it's just speculation, not saying this is necessarily the case.


I didn't mean to imply you overclocked. It sounded like you said you downclocked your CPU to get the computer to boot up, then I realized later it sounds like you switched CPUs to get the video to come back. Can you get video on your 3.0 core 2 duo *without* the FX 3800?

 

[Haris Khan]

What other cards have you used in that system? Just curious.

What I generally mean, is the most you really want to tax your PSU is 90% of it's max throughput. You're pushing more than that on a 475W PSU, so the fact that it's booting up on a 1.8 Core 2 duo and your FX 3800 might mean that the 3.0 Ghz Core 2 Duo + the FX 3800 is more than the PSU can handle, but it's just speculation, not saying this is necessarily the case.


I didn't mean to imply you overclocked. It sounded like you said you downclocked your CPU to get the computer to boot up, then I realized later it sounds like you switched CPUs to get the video to come back. Can you get video on your 3.0 core 2 duo *without* the FX 3800?

Yes i can get display from other cards well there is a problem since it is a old pc i had some old cards in my stock that i used to get display and they are not six pins cards i got fx 3800 on a request from a certain person so i wanted to test the card first before delivering to him but it seems hopeless right now i also changed power supply and used 500W instead of default psu. still the results were same. http://h10010.www1.hp.com/wwpc/ca/en/sm/WF06b/12132708-12132710-12132712-12132712-12132712-80611466-81415505.html?dnr=2
this link will show you all the specs including system default psu which is 80 plus efficient and has power factor correction blah blah. So i think the card is at default for some reason as i had also tried it on other systems too and same results were gained.

 

[CraigN]

If you tried the cards on other systems and it's not booting up, it's fairly safe to assume it's the card.