X6dh8-g2+ no video continous beep

Hello here is the homepage:

http://www.supermicro.com/products/motherboard/xeon800/E7520/X6DH8-G2.cfm

Try to boot with only one stick of ram at the time, to find the failing ram module.

This is usually caused by a problem with the system memory, or possibly the video card. The memory is more likely--the system complains long and loud sound, if it can't find any usable memory, as there is no way to even start the boot process when this is the case. The motherboard itself could also be the problem.

The mainboard is useing Up to 16GB DDR2 RAM.

Try not to buy cheap ram, they are always failing.

Good luck