thx guys.
Uni Team getogether today and we played overclk for a whole day.
unluckily, we didn't achieved 4.2G on Dual*xeon 5350 platform

but we made this:
http://service.futuremark.com/compare?3dm06=2462509

hey Geroge, u got crazy vga cards,
make a serious LN2 benching on ur Gem Quadcore and challenge Vince
that's an mission impossible for us, but u got the chance, come on !
Go go go ...Fire in the hole