So, I've had my 939 4200+ clocked nicely at 2.66ghz (242x11 or thereabouts). Ram was doing nicely at 333mhz on auto voltage through the A8n Sli.
"What the hell?" thinks I, "Let's bump it up to 400mhz"
Interesting result. Fans span up, drives whirred, but did I get ANYTHING on the monitor? Did I buggery. Nothing. Had to take the battery out of the mobo and reset everything.
Must read up on my memory overclocking. it's fairly good stuff, XMS3200 corsair stuff (the silver heatsink version). Maybe I wasn't giving it enough juice?