Need some advice, newbie OC

[tzeus]

Ok, first of all i want to overclock my system, which is an old piece of hardware.
I read the thread about overclocking, but being new in this all is still weird for me.
My hardware is as follows:
MB: GB P35C-DS3R
CPU: C2D E7500
RAM: 2 x 4GB KingMax DDR3 1333 = 8 GB
i don't think the rest matters that much
as a PSU i have a Sirtec 400W.
8800GT as graphics card.
I use stock cooler, i want to know how far i can get with this one.
The thing that confuses me the most is the ram stuff, I don't understand how to match DDR3 to cpu so i can have 1:1 ratios.
I tried messing with the settings in BIOS, 11 multiplier, and 333 host freq instead of 266, which gets me to a 3.66 GHz, and 1333 FSB on DDR3.
But after windows 7 loads, and all programs start, the pc freezez.
Right now i am on 303 host freq i guess, but the RAM is not on 1333 anymore.
Any settings i may have forgotten to switch on or of in the BIOS? I don't think in normal to freeze at only 3.6 Ghz, but who knows.
I did not mess with voltages i left everything on auto. I tried setting the RAM latency manually but i noticed no change and pc still froze after windows 7 loaded.
Any suggestions?
I realize this hw is ancient by now, but i know that once this mb was pretty good, and so was the cpu.

 

[Sazuzaki]

I don't wanna sound like an a-hole but I think your better off upgrading now, if you wanna overclock it first step is to upgrade the CPU cooler to an aftermarket one to give you headroom for overclocking.

 

[tweakboy]

Grab a 460 1Gb GTX for like 110 or 120 dollars. it will be a HUGE upgrade. gl