I have been debating changing my PC case to a Corsair 650D for better airflow and a general nicer case, but I don't know how easy is it to move the components. I haven't done anything like this before and I am thinking the hardest part is changing the watercooling on my cpu and moving the motherboard, help?
Its not very hard if you built the computer yourself. If you had someone else build it its more work for a first timer. I have built many computers for years now so its become pretty fast I think I would do it in this order:
1) Unplug the power wires and any other wires. Don't pull too hard but the 8 pin and 24 pin power wires (google for images of these if you need to) are harder to pull out sometimes
2) Unscrew the graphics card's screws then pull it out, unclipping the PCI-E slot's retainer
3) disconnect the H60's radiator and fan from the case
4) unscrew the screws that hold the motherboard to the case.
5) remove the standoffs
6) remove the I/O panel (the backplate with the plug colors etc for the mobo)
7) remove the power supply
8) install I/O panel into new case
9) install standoofs
10) install mobo
11) install the h60's fan into the 120mm fan spot on the back
12) reinstall the graphics card
13) install power supply and connections (pcie power wires for the gpu, the 8 pin cpu wire (usually runs up behind the motherboard's tray and over the top to the plug up there) and the 24 pin (usually runs out the back and up and out at an angle into the leading edge)
14) swap your harddrives and other peripherals over and connect the power and sata cables.
15) connect your case's power on and reset and audio headers to the mobo
You won't have to reinstall the CPU or TIM or any of that. The ram can stay installed. Just be gentle with the hosing and radiator when you pull it all out attached.