9600XT vmem/vgpu and lack of power

[NST6563]

I've done the vmem and vgpu mods on my Sapphire 9600xt a couple weeks ago. Got my speeds to 630/745 with 1.35v to gpu and 2.95v to mem.

however, when I up the vgpu, I cannot clock the mem as high as before. For instance, if I up the vgpu to 1.45 or 1.5 (which gets me a nice solid 660 on the core) I can only clock the ram to around 340/350 (ddr would be 680/700).

is there a way to run a 3.3v line straight to the mosfets on the card so that it can pull the power it needs direct from the psu instead of loading the mb?