Vue does not use GPU so the number of cuda cores don't matter.  Vue does reserve up to 1 g of memory and you have more than enough to do that.

The memory is manual, Vue will not automatically "go for it"

Go to File/Options ... select the Display Options tab.... change the Max Usable Video Memory to 1024

I have Xstream 2014.5 (current version) and that is all it can handle.

If you want to increase your vue render capability by decreasing render times, then you need more CPU. 

Here's a nifty formula...

Number of actual cores times 2 (or plus number of virtual cores) (if intel, don't do this if amd) times clock speed or ghz of the CPU times number of CPU's.  This is the render index for Vue, Poser, Autodesk, TG2 and above.  (not for Bryce or TGclassic or Silo)

So if you have a quad intel that doubles to 8 cores and runs at 3.9ghz, then you have 4+4x3.9 or 24 for a render index.

If you have a duo core that runs at 2.2ghz... 2x2=4x2.2=8 on a render index. The 24 would be about 3 times as fast regardless of your video card.

Eric