So now many quarks can one get in a 24 hour period with a better CPU?  Like say an 8 core AMD or an older L5420 Xeon CPU or an newer i7?

I'm trying to see if it's worth it to build up a new CPU rig to mine quarks or if an existing one I have (the dual core L5420 xeon dell 1U server) is good enough.  TIA