Strannik-74 and XPM-guru: what CPU do you have?

My miners disconnect after 24h, the miner is runing for more that 54 hours but the stats from ypool says that my workers are mining for like eight hours, it affects something or it's okay?

I get ~1.6CPD/R9 280x in low CPU usage mode (because I have an AMD Sempron 145).

@hero: yes, as far as I know.