Originally Posted by Bluecow003
When you change the FSB speed, that effects the CPU, the HT, and the RAM. They are all tied together. Don't let your HT get above 1000MHz (that HT multiplier x FSB < 1000).
It shouldn't reset the multiplier. Nothing should get reset as long as you use all manual options and DON'T increase the DDR400 to say DDR433 or DDR466. You know that option that has specific choices of DDR333, DDR400, DDR433, DDR466. Just leave that at DDR400. If you increase that option then it resets some other things to auto. However, if you just want to see how high your CPU can run and your memory can't handle it, then you can change that option to either DDR366 or DDR333, that is called the divider on Asus boards. It will lower the frequency of the ram without lowering the CPU frequency. Just change the voltages, the multiplier, the FSB, and your memory timings (just the first 4 timings really). In that Jumper Config. menu where you pretty much change all the voltages and stuff, there really shouldn't be anything in there that is on AUTO.
Make sure you're running memtest once your memory frequency starts getting more than it's factory settings to make sure the memory doesn't have any errors.
I have found that with running a 1:2 divider and a cpu multi of 6, I can get my HTT up to 320 or so before it fails. Also, my cpu seems to not enjoy going over 230-232 when at an 11x multiplier. I think that is an issue with not being able to give it enough voltage with my MB. I have yet to find the upper limit of my memory though. So far it has run fine at 1:1 with 230x11 (i.e. DDR 460 i guess). I was just able to pull off a seemingly stable OC at 232x11, but I had to max the voltage at 1.5v and it got up to the high 50's temperature wise. Looks like I am stuck at 2530Mhz until I get a different mobo and/or pull out the soldering iron and get some water cooling
Thanks for your help though!