These stutters happen in every graphics setting in games, right? If you could test this, it would help.
Download coolbits to enable overclocking. However we are not overclocking. I cant find my USB key, which means I cant find my custom registery files for enabling it, so download these.
Make sure you have the latest nvidia drivers. 77.77 are the newest. Get them here
To the overclocking.
-Right click > Properties >Settings > Advanced > Geforce 7800GTX
You should see a clock frequency tab.
Move to the manual overclocking bubble, select it and go thru the liability crap. Their is a pull down settings menu, select 3d.
Now pull the sliders all the back to the left, and try out a game. Your peformance will lower, but this determines if it's the card or not.
And instead of paying me, donate to TF.