X7DAE at the time of boot stuck on logo

Make sure the Compact flash card is set "Active" as well as formatted

Hello try to download the manual here:

http://www.supermicro.com/products/motherboard/xeon1333/5000x/x7dae.cfm

The fault could be a wrong setting in the bios chipset or cpu option.
Maybe one of the cpu has a wrong mhz setting ( overclocking )
This will make the system unstable.
75 degrees celcius is too hot even for a intel cpu.
Try to reset the bios to factory settings.
And look also for an bios upgrade.

WARNING!
Please do not download / upgrade the BIOS/Firmware UNLESS your system has a BIOS/firmware-related issue. Flashing the wrong BIOS/firmware can cause irreparable damage to the system.

Remember to add new cooling paste, not much, when removing the cooling element and fan.

Good luck

Make sure the DVD is plugged into the left most SATA connector on the motherboard. ( I-SATA0 )
Make sure SATA1 is set to "Compatability" in the BIOS.
Do not use "Enhanced" for SATA1.
Make sure the Primary IDE setting is CD/DVD in the BIOS.
Do not use "Auto"

On the USB problem, Make sure Legacy USB is disabled in the BIOS.
WARNING! The default is, Legacy USB " Enabled".

I found a newegg review saying that USB ports stop working and it is a defect of this board. Try to contact support and get it RMAed good luck

unplug the new card and retry,,

if it works without the card then take the card back to the store

sounds like yo had the same Problems that I had with my 5200 geforce The install did not go well. what was happening was the direct x was binding to the old mother board graphics system and not the new card . to make it rebind just change the refresh rate in the nvidia icon in your task bar . disable the display adapter from device manager for the motherboard graphics .put the card in the slot change the monitor cord boot up check you direct x by typing in run dxdiag and test directx to be sure it is running with your card you can also see that from the about nvidia you must have the driver for the card installed to do all this.. hope I helped install the driver first then disable download latest drivers here http://www.nvidia.com/Download/index5.aspx?lang=en-us 

cooler master heat sinks are the best

DD SYSTEM SOLUTIONS
(MOTHER BOARD CHIP LEVEL SERVICE CENTRE)
OLD NO.28, NEW NO.67, II FLOOR
SESHA CHALAM STREET, SAIDAPET,
CHENNAI - 600 015.
PHONE NO : 98405-11595

Hello Carlos,

Did you open the powersupply and check? I have recently worked on a PC with a similar fault and I found that the circuit board is partly charred and couple of capacitors leaking. I advice that you check it and post back..( I can't forget that repair coz I got one hell of a shock while working on it)

Sai.

3a
Remember to replace the DIMMs in pairs unless you have an exact duplicate spare.