Sigh ok looks like time for a technical explanation.
Intel processor speed is a function of two things:
1. Front Side Bus (FSB) speed
2. Clock multiplier.

Intel quoted FSB numbers are quad pumped, thus to derive the actual FSB speed of your processor, you need to divide by 4.

Non Extreme Edition processors have their clock multiplier locked, so overclocking is achieved by increasing the processor FSB.

Now very important: The lowest speed you can run your RAM is 1:1 with the FSB. (I think so, has anyone seen 0.9:1 divider?)

Every processor model is different. For example, your E4600 has FSB800/4 = FSB200. Thus at stock, your RAM is at DDR2-400 (DDR is double pumped), as Goldfries has explained. Thus you have a lot of headroom, as your RAM can reach DDR2-800, or FSB400. Your processor will not reach 12x400.

Now, your question. Performance RAM is used for processors that have higher stock FSBs or lower multipliers. As an example, I'm using a q9300 that is native 333x7.5. Now i know that my chip can reach 3.5Ghz, but to get there I would need 467FSB = DDR2-934. Your RAM would not be able to reach that, thus I need to use DDR2-1066.

Also, performance RAM has tighter timings. Typically ValueRAM has latencies of 5-5-5-18 ot 5-5-5-15. Performance RAM can go to 4-4-4-12 or better.

This post has been edited by zer0hour: Sep 9 2008, 06:56 PM

Aha yeah true, but those are the exceptions to the rule =p
I've seen cheap HP RAM using Micron D9s too..

Yup I'd like to know why you say that too.

Set your memory to as close to 800 as possible if you're going to stop at 320x9. If you're going to overclock further, leave it at 1:1 first.

Hmm those temps are a bit too hot for the Hyper 212. According to this chart it only loses to the CCF by 20%..so should be cooler. My QX@4.2Ghz loads at 60ish C.

I'd say reseat HSF or lapping time.

http://www.frostytech.com/articleview.cfm?...eid=2271&page=5

You're going too fast. To ensure maximum system stability what you should do is increase FSB in 5 or 10Mhz increments at a time.
Now you probably need more Vcore like Icemocha said. Go back to 9x320 but increase Vcore by +0.1. Run IBT 10 loops to test if stable. If pass, increase FSB by 10Mhz, run IBT, repeat.
If at any time you fail IBT, increase Vcore +0.1.