no...i am running at 667 not 800(i am sure mine said 2.2, but its not like that on there site no more...ohh well 2.2 max for EPV)....if you are running 667 then you will do that easy.... that depends on the rest of your system....i always run 1:1 for Intel systems and as fast as i can for AMD.
For windows you can run a blend torture test in prime95, if the ram is bad it will error, but if your cpu is bad(overclocked too far, ect) it will error the same way. memtest86 checks just ram....its bootable and will not touch your system in any way...there are tools on the ultimate boot cd that can...so stick to memtest for now....