My Q9550 make like 20mhash/s, so i expect your more recent quadcores to make a bit more. Dual cores will make like half of that
And the 2 quadro well i dunno, try them and tell us, i'm curious


The problem is, you will spend MUCH MORE in electricity, cpu and nvidia sucks at mining. Few ATI could easily surpass your center without problems.

Let me do a bit of math:

You have like 3.5 ghash/s from the quadcores
and 4.5 ghash/s from the dualcores
then add something (like 40mhash/s) from the two quadro.

Problem, ten 6990 can achieve the same performance.