I'm running ccminer v1.02 on a 750 and getting 1800 k/hash as expected.

for some reason after 20 mins or so.. it just drops down to 400 k/hash out of no where.. and stay theres

ive tried launching chrome or firefox thinking that would help it hash faster to no avail.

I have to restart the miner each time (After 15 mins) to maintain the 1.8 mhash speeds..

anyone experience this?

This is with windows XP 32 bit and the cards a evga nvidia 750 2GB (540 cuda cores)