New graphics card makes computer extremely slow

[Peejay_]

Hey!

I've recently installed a "new" graphics card. But since the installation, my computer became extremely slow. I use a rather old system, but games that ran at +/- 70FPS before, now run at 1 FPS.
I used to have an AMD HD 5450.

Now I installed the GeForce 6800 Ultra, a card that I got from a friend of mine. For this card, I upgraded my PSU. I now use an antec Neo HE430, 430 Watt power supply that I got from a spare computer. The graphics card is connected to this PSU with 2 seperate power cables. These cables both have a few Molex connectors. One of these is connected to my hard drive through a Molex to Sata power cable.
I have two monitors, my main monitor is connected to the GeForce 6800 Ultra with DVI and one is connected to my onboard GPU through a VGA.

I've uninstalled all video drivers 2 times already, but the problem persists. The computer becomes extremely laggy in Chrome, and any games or FurMark give me only 1FPS.

I read a lot about this card online and found that it should need a 350W+ PSU. Does anyone have any experience with these kind of problems? I'm stuck at the moment.

Thanks!

Here are my other system components:
MB: AsRock N68C-S UCC
Cpu: AMD Athlon II x2 250 3.00Ghz (running at stock speed)
Ram: 4GB DDR3
PSU: Antec Neo HE430, 430W
1x 120mm case fan (connected to motherboard)
1x 80mm case fan (connected to motherboard)
1x Cpu cooler (connected to motherboard)
GPU: Nvidia 6800 Ultra (and onboard graphics: Nvidia Geforce 7025 / Nvidia nforce 630a)
Software: Windows 7 Enterprise

 

[burdenbound]

Have you tried running a single monitor off the graphics card alone? I suspect you are having issues trying to use both the dedicated card and onboard. I know it's not impossible to do what you are doing but best practice would be to run both monitors off the dedicated card.

Also did you uninstall old graphics drivers and install the drivers for the new card?

 

[angelice]

actually that was not really an upgrade you just moved backwards to an 9-10 year old video card that can use nothing over direct x 9 ... from a direct x 10 card with very minimal performance.

 

[DeViL5o5]

It might be caused by the discrete card working together with the onboard graphics. have you tried it with just the "new" gpu?

 

[Peejay_]

@burdenbound, Yes I tried that with the same results.

@Angelice, Yes I am aware that this is an old card, but it's performance should still be a bit better than the other AMD HD5450 (in gaming).

 

[Peejay_]

It might be caused by the discrete card working together with the onboard graphics. have you tried it with just the "new" gpu?

When I installed the graphics card, my bios was set to PCI-e as main graphics driver, but I changed it later on. Both options have the same effect.

 

[angelice]

As I said this is a 10 year old graphics card it was actually a downgrade/side grade that just takes more power than the original and will not provide extra performance.

 

[Peejay_]

As I said this is a 10 year old graphics card it was actually a downgrade/side grade that just takes more power than the original and will not provide extra performance.

Hmm, could be the problem. Then I shall put back my other card.

 

[tianniulei]

Yes as angelice said you should put your previous graphics card back, since you weren't getting an upgrade, and it was drawing more power than the old card.

Also for future references, a standard procedure when you install a new graphics card would be to completely uninstall any old drivers from the old card before installing the new one and installing new drivers.