tennispro602 and IanRowlings,
A Xeon E5-4650 is an excellent 8-core / 16 thread, 2.7 / 3.3GHz that can be used in up to 4 CPU systems. It's also a generous gift- retail about $3,800.
After the shock of the price, there's nothing too magical about a motherboard for it as it's an LGA2011 Socket R, using 130W. Here's a list of compatible ones:
http://www.game-debate.com/hardware/index.php?pid=1186&moboList=Xeon%20E5-4650
The choice depends on how CPU's you'll have. If it's going solo, I'd recommend the Asus Rampage IV Black- fast X79 chipset, 8 RAM slots (64GB max up to 2400 speed), plenty of slots suitable for 4-way SLI, and 6X SATA 3.0. I see this motherboard at the top of the Passmark's Top 100 systems. If this is for a workstation and you're using ECC RAM, then I suggest the Asus P9X79-E WS, also a fast X79, with 7X PCIe of I think 5 are x16 slots, though not all will run at x16 simultaneously. If you are intending a workstation use requiring more than 64GB RAM, then you'll want a C602 chipset. The site linked is game-oriented so a bit more research,..
Quite a few choices, but to do that CPU justice, a very high performance motherboard will let it stretch it's legs.
I for one, would be very interested to know how it works out. The 4000 series Xeons are not usually found in a home PC situation. Btw, the step up from these are the Xeon E7- 8000 series and you can use 8 at a time at up to $5,000 each.
Cheers,
BambiBoom
HP z420 (2014) > Xeon E5-1620 quad core @ 3.6 / 3.8GHz > 24GB ECC 1600 RAM > Quadro 4000 (2GB)> Samsung 840 SSD 250GB /Western Digital Black WD1003FZEX 1TB> M-Audio 192 sound card > AE3000 USB WiFi > HP 2711X, 27" 1920 X 1080 > Windows 7 Ultimate 64 >[Passmark system rating = 3923, 2D= 839 / 3D=2048]
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