Why is that obvious? You're worried about artifacts when your gaming is fine...why are you worried about it then? If it does what you use it for safely, why are you worried about a benchmark? Or would you rather play benchmarks than games?
I just think artifacting in gaming is really rare since people usually overclock their card mildly to not cause the artifacting or OC it so hard that it can't even run 3dbenchmark without crashing ( or maybe a good balance between ). Even thought I won't likely spot any artifacting I would still like my gaming to be artifact free I cant do an hour without getting a delta or error ( which resets timer ) in ATI Tool if I go past 612 mhz core clock