My brother wants to do bitcoin/litecoin and is spending $550 for graphic card and a SSD/HDD... I found a $470 R9 290 with an aftermarket cooler on it and seems to be a good deal. should I get a SSD or a HDD? the computer will be barely touched and will turn on 24/7 for a whole year... what type of CPU is needed, can A dual core processor(LGA1155) bottleneck bitcoin mining?