Half-Life 2 does already shine on those cards, and the 3.46GHz Gallatin EE is faster (in Games, not in Multimedia as i have to admit) than the 3.73GHz Prescott EE.
Hell, at LEAST it shouldn't be SLOWER than on the old system? (Which it is, unfortunately)
Old System: 3.2GHz P4EE + Single AGP 6800U + DDR-I 2-2-2-5.
New System: 3.46GHz P4EE + 7800GTX PCI-E SLI + DDR-II 2-2-2-6.
The new System isn't on par. It's ridiculously fast in HL2 and D3 etc, but Silent Hunter III is slower than before...

I guess it has something to do with a SLI bug.. No ideas?