Ram trouble here as well.
I've had this E4300 at around 320fsbx9 on an msi board with 3gb ram (TwinMOS 6400 2x1gb 2x512mb) which i swapped for a Gigabyte GA-N650SLI-DS4
Highest combination i've been able to run it at is with 2gb ram only and fsb at 286 making it 2.6ghz. Which is kinda crap and it ran higher (stable) on the other mb. Unstable on the other board the FSB was up to 340 or so with the 3gb ram.
Reading stuff here and on other forums seems to indicate that this mb is a bit random with regards to ram.
The particular ram I'm using uses 1.8 volt by default, and messing with the voltage doesn't make a difference. I manage to boot up with 3gb and default CPU speed but its veeery unstable. Upping ram voltage doesn't seem to make any difference. Tried 2.2v
Also, I took out the 2x1gb and put in the 2x512mb, and it runs fine with that combo as well in dualchannel... Also tried to move them between red and yellow controllers and either is fine as long as its only 2 slots being used (yellow+yellow or red+red for dualchannel. dualchannel works fine for me.)
It just stops working when i fill more than 2 ram slots. Asking a friend to bring his OCZ ram over to see if i can clock it higher with that ram instead of 2x TwinMOS.
setup:
E4300 with a Noctua 12, arctic silver 5 between em, fan mounted on top sucking it from the cpu cooler to the psu. (wouldn't fit on the other side because of the passive nb cooler. 80mm fan aimed at the nb. Haven't seen the cpu be over 49 degrees ever. That's overclocked with 2x prime95 at max power/heat thingy, one on each core)
600w seasonic psu
xfx 8600 gt
TwinMOS DDRII PC2-6400 Dual-Channel Kit 2GB (2x1GB) 1.8v
TwinMOS DDRII PC2-6400 Dual-Channel Kit 1GB (2x512MB) (not plugged in atm) 1.8v
3 pata disks 2 sata disks an old cd burner and an external usb2 dvd burner (hence the overkill psu plus i might do a cheap sli)
Oh and, I can boot it at 1.325v in bios, ends up showing as 1.21v in cpu-z (that's quite a bit of vdroop) but is actually stable even then. I increased until it shows 1.325 in cpu-z which is slightly below 1.4v
I like this MB but would like a solution which doesn't involve me burning more money on hardware :F