[Solved] Question on Ram Speed and OCing the EVGA 141-BL-E757-TR Motherboard

Well after playing all my games including WoW on what is now an ancient Frankenstein of a machine... P4 1.8 GHZ 512MB of ram Nvidia GeForce 2 video card... (Yes I was lagging ALOT, but it ran and I'm in a raiding guild. I am very good at tweaking settings to get the most out of my computers.) I have finally gotten enough together to build myself a very nice gaming rig.

CoolerMaster Haf 932 Case (Standard case fans)
Cooler Master Silent Pro 700W PSU
Intel Core i7 920
ThermalTake SpingQ CPU cooler
EVGA 141-BL-E757-TR LE Mobo
1600MHZ OCZ Platinum Ram 3x2GB running 7-7-7-24
WD 640GB HDD with 32MB cache
Asus 5870 Raedeon Video card (no Crossfire just the 1)
DVD-RW w/ Lightscribe
24in Hanns-G monitor 1080i
iHome Laser Mouse
Logitech internet Keyboard and speakers

Now I am going to sound like a noob as other have stated before about themselves. I have finished building this system (My first) and it booted to setup and posted fine. Here are my questions.

1. Why does the ram get autoclocked to 1066Mhz instead of 1600Mhz; I tweaked it back up by adjusting the memory freq to 1600mhz... I think... Please help...

2. I saw, (I think his name was Crashman help out a gentleman by the name of Bozosayshi in a thread called "Overclocking my i7 to 3.5, 4 ghz" ) and others, as well... What would be the best way to OC my machine? Also an offshoot of that question is should I OC after loading all my data into the HDD or should I OC and then load the O/S? Thanks in advance.

Thanks r_manic I will :-)