You are getting 1, 2, or 3 beeps that indicate a memory failure.
1 beep - Refresh Error (with nothing on the screen and it is not a video problem)
2 beeps - Parity Error
3 beeps - Base 64 K memory failure
Reseat the memory.
Make sure that the contacts on the memory and the socket are clean.
Try removing one bank of memory modules at a time. Note: Some systems might need to have a memory module in Bank 0.
Try using memory modules from the same manufacturer with the same part number and speed.
Check for a faulty memory module by trying the memory in a known good system.
Trying known good memory in the system.
Check the power supply and check for power fluctuations.
If the steps above do not resolve the problem, the desktop board may be defective. Try a different desktop board
http://www.intel.com/support/motherb.../cs-010249.htm