1. Is 50% GPU load going to slow down web browsing? If so, how about 30%? I know this can depend case to case but what is average estimate? I browse will mining with 2 6970
2. 1GH/s, pool mining? How long would it take you average to get 50BTC at current difficulty? current difficulty is IRRELEVENT difficulty will jump by 10X to 100X the price of bitcoin is also important
3. How much mhashs HD7670m gets?not much since it's the mobile version I'd guess 15Mhs
4. What pool best suits someone with 1GH/s? anypool I use BITMENTER since it's ASIC ready.
5. 4th question for 5GH/s see 4

Thanks