Can I do mining with a normal PC in my house?
I will setup Linux (Ubuntu) for mining. It will be open 24/7. I don't have too many expectations. Maybe 0.1 in one week?
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Can i do mining with a normal PC?
Yes, you can.
I don't have too many expectations. Maybe 0,1 in one week?
No, not possible. You will effectively compete against all computational resources on Earth, that are now cracking this nut. If I can estimate, a humble home PC will produce around 1 - 100 MH/s, based on CPU or GPU mining stats. This range covers different CPUs and single-GPU computers. You can compare hash rate with the profit estimate using this calculator. Based on the hash-rate, your electricity bill will much out-weight any profit from mining.
To achieve a 0,1 BTC/week you'd have to invest in a pretty expensive, power-hungry ASIC box that can produce tens of GH/sec, subject to ever-increasing complexity.
To get 0.1BTC in one week with current difficulty levels you need to have at least 3.000 MHash/sec ASICminer.
A regular GPU will provide just 50 ~ 60 MHashes so it will take quite a bit longer to achieve 0.1BTC.
My recommendation is to get one of these ASIC miners to get a better performance: http://www.ebay.com/sch/i.html?_odkw=asicminer+block+erupter&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR5.TRC1.A0.Xasicminer+usb+block+erupter&_nkw=asicminer+usb+block+erupter&_sacat=0