1.65v RAM will void your CPU warranty. Sandy Bridge CPUs need 1.5v RAM. The memory controler is on the CPU itself and not the motherboard like in older generation chips. I have seen 1.65v RAM cause instability issues when overclocking Sandy Bridge chips and it can damage the CPU.
Do not buy a Thermaltake power supply. Antec and Corsair are fine along with Seasonic, PC Power and Cooling, XFX, Enermax, Silverstone and OCZ. Stick with those brands for a quality unit.
The Hyper 212+ is decent but if you can get a Hyper 212 Evo then that's even better. The Evo will cool 4 to 5 degrees cooler than the 212+.
anort3, thank you for your answer, can you explain about that memory controller you mention,
where do I configure as you mention on the cpu itself, can i still use the same memory I purchased
and reduce voltage from 1.65v to 1.5v?? 2x(Mushkin 2x4gb Ddr3 1600 Redline 1.65v)
about the cpu cooler, what about Cooler Master N520 isnt it better than Hyper 212+? evo is out of stock here