I'm pretty sure I can do much better than 4.5Ghz, but right now I'm remodeling my house and the only "clean" room is my bedroom and it is hot as hell in there [wife got the heating system in near full blast]; also, I'm playing around using 1.65v DDR3 RAM, that's the reason behind the low RAM speed of 1442Mhz. So without further delay, here is my PC, 4.5Ghz w/ 4GBs of RAM [used 2GB in LinX since it only had just over 3.3GB available] Cooled by WC: DTek CPU block, stock BlackOps NB block, EK HD4870 block, ThermoChill PA120.3 w/ 3 120mm Scythe fans, external 500cc aluminum reservoir, 2x Swiftech MCP355 [I think] coupled by an EK dual top. System BIOS settings: CPU 1.34v, NB 1.40v, VTT 1.25v, RAM 1.64v [my board jacks it up a bit, so I got to fine tune this later]

PS: Let me know if you need me to run LinX with any different settings; but the system is rock solid, as you can see it passed 28hrs 40mins of Orthos before I paused it to do the LinX test.