One of those must be the case, because the additional CPU voltage changed nothing. I'm going to try starting the overclocking process over using the default 9 multiplier, instead of the 8.5 that I was using (I had been told that 8.5 was the E8400's sweet spot, but that's not worth much if you can't push the FSB far enough to matter).
I just ran a series of tests (Just playing a game, World of Warcraft to be exact) Being that mine's an E8200, I'm stuck at 8x multiplier:
Step 1: I've been running 460x8 almost from day 1, went for the 1ghz OC... 2.66 to 3.67 (vcore 1.275v - hardly an increase from stock), vdimm +0.2 = 2.0v, divider at 2.40 = pc2-8500 with a very mild OC, PCI-E, FSB, and MCH voltages all at default
................runs fine no matter what I throw at it
Step 2: 10mhz fsb increase. This motherboard will not run games at 470fsb.
- change memory divider to 2.0, memory running way under stock - no go
- increase fsb and/or mch voltage to +0.1, +0.2, +0.3 - still no go
- increase vcore to 1.375(to account for even the minor 80mhz cpu speed increase) - STILL no go
Leads me to the obvious: my particular motherboard is not going to pass ~460 fsb Here's wishing I'd spent the extra $14 at the time for an E8400.... 460x9 gets me almost another 500mhz, I'm ABSOLUTELY sure my cpu would do it even if it took that 1.35-1.4v to get there :\\