video card overclock question

i used rivatuner to overclock my EVGA 8800GT, never did it before so i might have went too "ballz out" but i did it in 4 steps so far and ran 3dmark06 after each move.

i am currently at
Core: 721
Shader: 1736
Memory: 1021

my temps are always under 60*C and 3dmark06 runs fine with no visible problems

i just installed ati tool and started checking for artifacts in the set up listed in the first post, and in the first minute i would guess it found about 10-15, so what do i do now?
is that bad? should there be 0?, all i did was install ati tool, open it and hit scan for artifacts

Back your clocks down.

Do one slider at a time when you OC, and once you find the max, go back and do the next one.

Then try all the maxes together and adjust accordingly.