What program can I use to load my gpu to 100% want to see temps (putting it under water want to measure temp drops), also a program to test the stability of a overclock? Ideally a program that does both but don't mind tbh. 
Oh and my gpu is an eVGA 8800gts 512mb G92 core Stock

Oh and my gpu is an eVGA 8800gts 512mb G92 core Stock