Are you sure the beeps are cpu?
The only two halfway standard beep codes are :
a) beep - pause - beep - pause beep - pause loops which mean memory initialisation failed. Possibly no memory present, memory overclocked, memory broken or memory power insufficient.
b) beep - beep - beep - pause - beep - beep - beep - pause loops which mean graphics initialisation failed. Possibly no vga adapter available, or adapter broken..
Apart from that there are custom codes for different oems and motherboards. Check your manual.
Also a long high pitch noise means your nvidia graphics card doesn't get the needed power over pcie or molex aux power plugs. Check if plugs are properly inserted.
Error checking:
1) Try removing your memory modules - if the system doesn't beep #a sequence at you your motherboard doesn't react to powerup at all. Because an overclock failed, powersupply, motherboard or cpu failed. Most likely overclocking or PSU. On older Socket A boards most likely motherboard failed as the voltage caps dehydrate more rapidly than other systems.
2) Try removing system power and unplugging the bios battery. Leave it like that for an hour and try powering on (don't have to insert the battery again, but won't hurt).