he's only upping the multiplier so its not touching the ram
incorrect. changing the multiplier will change the ram frequency/divider as well, though not by much in this
with the stock multi of 13: 13 x 200 = 2.6/7 = 371 (stock speeds), but with a 15 multi: 15 x 200 = 3000/8 = 375 : the multiplier usually affects the ram speed with amd rigs. and you dont set the divider. the multiplier and selected ram speed (400, 533, 667, 800) determine the ram frequency/divider.
you need to drop your ram to ddr2 667.
thats may be what is holding you back. it will at least take it out of the eqation.
you may also have a mobo that doesnt like high htt link speeds. mine does, but yours may not. try lowering the ht multi to 3 or 4. if one or both of those together dont work, you have other problems post back.
i can run 3.2-3.3 at 1.35-1.375
you shouldn't need 1.4V.