Hi everyone , I'm fairly new to this all and I have a couple of questions.

I've been mining qrk on my laptop using the cpu (sandy-bridge pentium 987) at roughly 55kh/s which from my reading is pretty average for cpu mining. I'm keen on giving the gpu mining a go but my laptop uses the Intel HD integrated graphics. Would this chip still be viable considering it has 6+GB of memory available?

Second question: Is the difference is hash rates ~3 with dogecoin vs ~55 with quarkcoin, due to difficulty, pool size or the mining style being used?

Edit: 10Kh/s with dogecoin currently.