I'm looking to upgrade the processor on my Compaq SR2038X computer. Currently it came installed stock with an AMD 64 X2 Athlon bit 3800+ running at 2.0GHz. I'm looking to upgrade to as close as 3.0GHz as possible, but I'm not sure what type of processor would work since I do not know the power requirements of the current processor I have. I know my computer has an ASUS A8M2N-LA (NodusM3) motherboard and the processor has an AM2 socket, I was looking at this processor but I'm not sure if it would work or not:

Newegg.com - AMD Athlon 64 X2 5600 Brisbane 2.9GHz 2 x 512KB L2 Cache Socket AM2 65W Dual-Core Processor - Processors - Desktops

Can anybody point me in the right direction of what processor to get and what would be compatible with my computer/motherboard? I'm running XP MCE Service Pack 3 with 4GB of RAM.