You have the same graphics card that I do, and my PC version runs fine.

Try going into the graphics settings and changing a few things, it might help. GeForce has it's own graphics control center, so if altering all of the game and resolution settings wasn't helping, then this should help.

I woudn't know WHAT to change exactly.

Tell me, are you playing a ripped version of the game or are you playing one that you bought? There might be errors in the game if it's ripped, I don't know.

BTW, this is totally unrelated, but I think the PC of FF8 is HORRIBLE. The graphics are fine, but the sound is so bad it makes my ears bleed. The resolution and quality settings look really bad on a monitor for some reason. I'd much rather play the PSX version, but that is my opinion.