Here's a dual Gainestown EP config; dual Xeon E5520 @ Asus Z8NR-D12 with 24GB DDR3-1066Mhz ECC RAM (stock clocks).
I'm using the y-cruncher v.0.4.4.7762b version. Some Large Benchmarks:
(All RAM)

500,000,000 digits (and CPU-z):



1,000,000,000 digits:



2,500,000,000 digits:



And here a 5,000,000,000 digits resluts:



A quick run too:



Regards