Highest clock SS:

At least 1.75vcore and cool with DICE,Cascade,Phase or LN2

Disable EIST and C1E for all time 12.5x multi

That is normal as E5200 FSB wall is low in general so oc E5200 is kinda like QX,make up for lack of FSB with 12.5x multi

Errr.........E8600 price is more like RM900 leh

GC is the big part about performance but well tweak system do play a part as well
To get the best out of mid end gc,you need something like 500x8.5,6MB cache 1:1 divider and PL9,or any setting that can yield 9000-11k bandwidth as you got to remember,texture is store on ram before being send out to gc to process so the best gaming processor is E8xxx as you could tweak it nicely

OC an E5200 M0 just now,can do 23lopps IBT(Stopped)@3.3ghz,266x12.5 1.25v set,1.2v after droop on Gaygay G31 with IGP

Wolfdale is known to have stuck sensor,that why give mess up reading

Nope,it is the basic vanila strip down version of wolfdale core
But cheap@RM240 or so,with 4ghz clockspeed on right combo is nothing to complain lor

Errr all down to what you do lar madman
If you always encode video or doing stuff which is processor intensive then yes procesor speed help
Higher Clock also will help in gaming as it can gain a few FPS,in some case the useful one,well when combine with graphic card oc as well
But if all you do is just facebooking,msn chat and some general office word then you can't see the difference between 2.4ghz and 3ghz
And in I/O intensive task,all the performance increase on the 600mhz clock is masked by your slow I/O(HDD)
Just my 2cents