Hey guys, more problems. i'm planning to build a comp with:

TWO CPU: Intel Xeon E5-2620 V2 2.1GHz 6-Core Processor  ($467.33 @ Newegg Canada)

CPU Cooler: Cooler Master RR-T4-18PK-R1 70.0 CFM Rifle Bearing CPU Cooler  ($23.49 @ DirectCanada)

Motherboard: Asus Z9PE-D8 WS SSI EEB Dual-CPU LGA2011 Motherboard  ($639.00 @ Vuugo)

Memory: G.Skill Ripjaws X Series 16GB (2 x 8GB) DDR3-1866 Memory  ($171.98 @ Newegg Canada)

Storage: Western Digital Caviar Blue 500GB 3.5" 7200RPM Internal Hard Drive  ($57.97 @ DirectCanada)

Video Card: Asus GeForce GTX 660 2GB Video Card  ($189.99 @ NCIX)

Power Supply: Thermaltake 1200W 80+ Bronze Certified Semi-Modular ATX Power Supply  ($219.00 @ Vuugo)

Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit)  ($98.87 @ DirectCanada)

would the memory listed above work with the motherboard or do i need registered ecc memory, because i am going to be using this computer for running auto cad and revit which are both cpu intensive.

Ram is fine plz dont use a thermaltacky psu and you dont need anywhere near 1200w's of power and Win7 Home Premium is limited to a single CPU socket. Pro and Ultimate are limited to 2 cpu's.

Windows 7 Professional, Enterprise, and Ultimate allow for two physical processors,

ok, then is there any recommendations for the psu? and for the cpu cooling maybe?

I think you'd be good with an RM1000 or even an RM850. Just look to make sure that it has 2 EPS connectors so it can power both processors. 

Since you can't OC the Xeons get a couple of Hyper 212 Evos.

Xeon's dont get very hot any heatsink will do.

theoretical maximum power useage x2 Xeon's 80+80=160w GTX 660 140w one HDD = 10w/15w even with a shit ton of fans lets say 20w = 230-250w's a solid 500w unit like a seasonic or a super flower power gold psu will be more than enuff.

I am just perplexed as to what use this computer is for...

well its going to be used for running auto cad and revit which are both cpu heavy. auto cad is basically a drafting software and revit is 3d rendering.

It doesn't matter what it is running. The CPU can only draw so much power eve if it was 100% usage. It is a fixed number. We know what that number is. You don't need 1200W. 

I'd do a little research for the best cpu/video cards for cad before spending any money.


The asus support link for the mobo you listed provides a pdf file of all the qualified vendor's list of memory supported (Memory/Device Support):