overclocking.......

am overclocking ma evga 6800gs 256mb.......

i overcclocked it to 427/1192 from 400/1100 ........ nd the temp while running 3dmark05 goes upto a max of 76-77.....

got a max score of 5277.....

ma config is....

amd 2800+ 64bit
1gb ram
asus k8n mobo

now the prob is that...... i cant overclock it any further...(am using rivatuner)..

if i increase the core or memory frequency anymore rivatuner tells that the driver failed the test nd to reduce the frequency.......sometimes if i try testing a particular frequency a few times it works but with no significant results.....

i tried changing the drivers too...... was using 92.91...... switched to the latest....... nd then to the once that came with the card....... no use.....

so guys .... cant i overclock anymore ?????