Overclockability is based on the power management of the mobo, and the quality of the chip. While I love my extreme3 gen3 mobo I would suggest bumping up the quality to one of the bigger brother boards if venturing into the 4.5+ territory. My first board had some power management issues that would not allow me to run 4 dimms of ram, and would not properly control one of the system fans. I am sure it is a fluke, and the replacement board works great, but it does make one wonder about build quality. Remember ASRock is the budget version of ASUS, so you may have better luck OCing with a true ASUS board, or a higher end AS Rock board.
I just read a lot of varied comments on Ex3 Gen3 overclocked. I guess it's win or lose, but I think I might stick with it since it can always be returned if something's wrong, and it does seem to handle 4.5 well. So what kind of overclock might you recommend with this build?
I also read a 32mb cache for my kind of build won't show a great deal of performance over the 16, and it is reasonably more pricey. So I think I'll go with the Caviar Blue. I know it's the weak link.
What I'm mostly concerned about now is the case. Do you think Centurion 5 II is sufficient for this build? I'll cool it with 140 mms front, top and side, plus 120mm rear.
i like this build because its almost 100% identical to mine
ocz modxstream 600w
8gb g skill
hitachi 500gb 7200rpm
asrock z68 ex3
i paid 747 around in socal and i can max skyrim and swtor
ofc with some settings on or off or tweaked, but its really good
A 4.5 GHz OC should be stable. However, you should always do stress testing. And if you find that it is not stable, you can always bring it down.
It looks like that case should be able to hold everything. It is not the largest case out there, so if you plan on doing a dual GPU setup later on, you may want to consider a bigger case for more room to work with and some better cable management.
Overclocking isn't something you set and forget and all chips are different. You could try my settings on my signature with all energy savers on, setting up the intel throttle higher, LLC1 and see where that gets you. prime 95 on small ffts and monitor for a day. Temps could be too high or system unstable, nobody can know for sure. Try small ffts on prime95 and gpu test on occt for max temps... but if the ambient temps rise it could make your system unstable. During winter i don't like temps more than 60 when at load but that is something personal. I had stable OC at 1.35v and 5ghz but i am uncomfortable with 75C during winter.