Some people have written that a motherboard will only beep if the processor is GOOD so I suspect yours is good. That doesn't point to a bad motherboard though, it could still be bad memory. If you have more than one memory DIMM, try installing just one stick and see if the system completes POST. If no video, try the other stick of memory.
I've tried 4 sticks, each pair of two sticks in the blue sockets, and single dimms (With both available GPUs). No combination changed the outcome.