program which cheks 6800 mem speed

[AH786]

ive been overclocking my 6800, the core goes to 385 max and the doom 3 timedemo increases by around 6 fps. now, ive been messing around with the mem speed. between 700 and 900 there is a 3 fps difference, now that doesnt sound right.

im using 61.77 drivers, im pretty sure the memorys not being overclocked properly. is there any way i can test to check if it is.

im overclocking using expertool from gainward, i tried rivatuner and coolbits before, same problem with them,