Therefor, it will be a wash. It will interface with the GPU faster, but lag on the CPU.. while DDR will be better for the CPU, but lag on the GPU.
Computer 101, thus the reason absolutely no computer uses GDDR as their base ram, it is always on the graphics card *only*. AMD, the makers of the graphics and cpu chip, have even publicly stated that latency is a key factor in how well their CPU's do.
Let's not rehash it again, since we'll have people with absolutely no clue attempting to speak when they should just be quiet :/