Hello tell me if these are acceptable overclocking temps!!!!

Hi,

I have inno3d geforce 6600 (non-gt) 128 mb. Its core n mem clocks are 300 n 500 respectively. I,ve overclocked it to 385 core n 615 mem and at load my temperature reaches 85-87 C and idle temp is 60-62 C. I m using the stock fan n i also like to mention that i used the Ati Tool to scan for artifacts and this is the max speeds at which it ran without giving artifacts. also i ran 3d mard 05 n before OC the score was 1898 n after OC the score was 2377.

Now, i want to know if this is significant increase in scores or not. the second thing i want to know is if the temp is acceptable, i ve heard that gpus can take n sustain more heat then cpus, so is that true.

Thanks