I needed to change the hard drive on the desktop after my son had run it into the ground gaming. He had clocked the graphics card and had all sorts of carp loaded on it. I did a complete rebuild which included stripping everything , including the loom, washed and cleaned the cards. Dismantled the fans and washed the blades, changed a couple of resistors in the power supply, repasted and seated the heat sinks and did a clean w7 install from the original disc. When I was looking at buying a hard drive I fancied a solid state hybrid, and lo and behold I went into my local Maplins who had a 2tb Seagate on offer that was cheaper than a 500gb standard one. So I bought it, no partition set up required and it runs quiet, cool, and as fast as lightning. After getting it up and running on w7 I forced through the w10 upgrade with 2 days to spare. Mean Machine now with a good Asis motherboard and top end Radeon graphics card and sound cards, which were the best we could get 5 years ago when we built it.