processor upgrade on hp netserver LH4R

[CA1305824]

hi everyone.i hope someone can help me here.i just recently got an old hp netserver LH4R and i have 4 700mhz processors to go with it.i installed 2 of them just to try them out the server booted and everything but only come up as 500mhz.im quite new to these servers and i dont know what to do to make them read right.there is no operating system installed but i was wanting to install windows server 2003 on it.i already have 2 gig of memory in it and have another gig on the way.i have heard alot of good things about these netservers about how reliable and about how powerful they are.i was wanting to host my own website and i hope this is the server for it.i hope someone can help me with this.thanks in advance.