Originally Posted by thumbhammer
Ok, the facts....E4600 @ 3GHz with multi x12 and at 250MHz bus speed. While looking at CPU-Z after my first overclock I saw that my divider was a 1:1, a suggested mulitplier for starting out, but something didn't look right....my DRAM frequency was at 250MHz (effectively 500MHz) instead of 400 (effectively 800MHz). SOOO...I go into the BIOS and see what options I have. I can't change the multi, but I can change the divider. The choices are, I think: Auto, 1:1, 1:1.1, 1:2, and 1:1.2. I change the divider to 1:1.2 and get it to 375.8 or 751.6MHz effective. Now heres the question, can I or even should I need to/even want to push it past or try to break even with 800MHz+, or is it not even gonna make a difference? If I set the divider to auto, it wants to go to 1000MHz or something, but I doubt it would be stable.
It's an age old question actually. The old days when AMD and Hyperthreading was king, there were numerous tests that showed that OC of ram did improve performance during certain applications. And when CoreDuo series took over AMD, most people think that 1:1 ratio is the best meaning FSB:RAM. There are still numerous findings that OC ram does indeed improve performance marginally, but most people only see benefits during benchmarking (PCMark or Everest) or memory intensive applications.
My opinion on this is that we all OC so that we can get the max performance out of our system within limit, so why not our mem as well? Even if we don't see real life benefits on a day to day basis, if it is capable of more, then why not?
Most 800mhz ram, depending on quality and thermal management, will overclock very easily with enough voltage. And with ram prices dropping faster than stock market, you can get into a very overclockable ram for very cheap. Chances are, you ram might be able to handle the 1000mhz, if you overvolt it to around 2.0v to 2.2v, with something like 5-5-5-15 to 5-5-5-18 timings, and in some cases only with 6-6-6-18 timings. You may also want to overvolt your NB by a small margin once you overclock, so that it can handle the extra load.
If you are really concerned though, or if you don't feel like your rig can't handle it, the good news is that even at 751mhz vs 800mhz, there would not be any difference at all, so I would run it at that speed.
Hope that helps.