so i just found this on ebay INTEL S2600GZ4 DUAL XEON Server motherboard 24 dimm slots to768gb 4x 1Gb Ethern | eBay and they are very cheap for a dual 2011 board but i was wondering what kind of psu's would fit in there?
but why are those motherboards so cheap? and i also found this board Intel DBS2600COEIOC Server Board - SSI EEB - LGA2011 Socket C600-A onboard Raid | eBay that is a new 2011 board that you can use with a normal psu and server case so how is it possible that it is so cheap?These boards come out of the 1U and 2U base servers and are cheap in the first place (I buy these servers for $1100 AUD, barebones (Chassis, 2x PSU's, 8x 3.5" drives bays and CPU heat-sinks).
Put the board in the chassis it designed for, put the PSU's designed for it in there and you have a working system. You will need the PCI-E riser cards to use the slots. You will also need to run the BIOS/BMC setup as well.
You are 100% correct about the system with a normal psu. I have a S2600cp2 board here in a intel p4000 (5-fan, dual 1200w PS) case that after flashing the bios/bmc/etc it is not much louder than my HP Z400 desktop once booted up.You can try to use that board on a normal PSU but you will have a banshee until you managed to flash the BIOS, BMC, & the rest as it will be looking for the dual supply control cable (Black 4-pin socket just between the 24-pin power and the P4 socket). Once done, then yes, it will work.
You are very correct about the prices but one would start to wonder if they are brand new or refurbished boards.