Why does running jhpminer drop hashrate of cgiminer drastically?

[Sancho]

Jhpminer is using CPU and cgiminer is using GPU - CPU gets 50 khash/s at best, so it should only lose that much from cgi when I start jhpminer, no? Well, I lose about 1000 khash/s instead.

Anyone know why? I'd like to run them both simultaneously. I was able to do with before when I was running cudaminer with a gtx 670 - not possible not with cgiminer and the amd 7990.

Thanks ahead of time!

[Sancho]

Nevermind, it looks like primecoinminer doesn't do the same thing. I'll just use that. Thanks!