They are both dual hex core xeons HT'd.
The R710 (bottom one) has a pair of X5670's
The T610 has a pair of X5650's
They are good for about 100k PPD each, although the 710's probably pushing closer to 120K due to the higher clock speed. I just stuck Ubuntu Server on them both kicked them off and left them.
Wow, 100k each? That's nuts! I bet those were very expensive as well I believed F@H was mostly about using the GPU? Maybe I'll set up my not so GPU computers as well?