Quote Originally Posted by daimaah
I have a newbie question though. I have Intel C2D E6300 and some Corsair RAM, TwinX 2x512 5400 C4 (675 MHz). I'd like to know how to overclock it slightly so that my memory will run in sync with the processor (now it runs in 4:5 ratio, I think, processor at 266 and memory at 333). I'd like to run both in 333. The problem is that when I change the settings in BIOS and save, I just get a blank screen and nothing happens. I have changed the CPU Frequency to 333 and DRAM Frequency to DDR2-667. I've also tried "locking" the PCI-E Frequency to 100 MHz and PCI Clock to 33.33 MHz, but that doesn't change a thing. I'm only looking for a very small overclock, for now and I can't even get that to work.
You are correct - at stock speeds (266/333) your memory is running the 4:5 divider. If you bump up your cpu to 333, you'll have to switch to the 1:1 divider. Just be aware that as you bump up your cpu frequency, your memory frequency will increase in proportion to the current divider you have set. With a 333 cpu frequency, you'll want to pick the option in the DDR frequency list that shows "667 MHz".

Since you are overclocking your FSB as well as your CPU in this scenario, you may have to increase your FSB termination voltage, as well as your CPU core voltage - possibly even your DDR voltage.
FSB termination voltage was a biggie when I was overclocking - I have mine set at the max.
With Corsair memory, you can safely go to the max of 2.1v. I have found this necessary (even when keeping your memory in-spec) when you overclock the FSB, as it places extra strain on your memory.
I'd increase your cpu vcore value to 1.35 - 1.4 for starters; you can always back it off until you start noticing stability problems.

Disable frequency spread spectrum in the jumperfree config area, and disable static read control under the "chipset" section where your DDR settings are. You may also want to configure those timings manually, as the defaults for Corsair memory are incorrect (there were for me at least). You may want to visit Corsairs website for the timings for your memory. They'll give you the first set (5-5-5-15 for example) - but you'll also need the last set. For my XM2S DDR800, my timings were 5-5-5-12-6-42-3-11-5-14 (the last 6 values were all default to 10 in the BIOS, whiched caused stability problems until I changed them). There is a utility out there called "memset" that runs under Windows, that reads your memory timings correctly - you run it on a stock setup, then get write the timings down. When you go to overclock, manually set up those values for your memory.

Hope this helps!

-Ryan