I would advise getting a bit of a better card if you're doing 3d rendering. If you could stretch your budget a bit. It isn't just about the vram, it's also about the cores and speeds
Actually 3D rendering is a CPU intensive task instead of Graphics Card. Its purpose is to diplay the model with a nice and sustained frame rate. And as I sauid earlier, my CPU has 8 cores thats pretty OK to render out basic animations and pics. I just wanted to know if the VRAM would make much difference as the clock speed is quite decent.