Hi Ola, so does setting the display mesh density to be coarser make it workable for you?

I'd suggest setting (under Options > View > Meshing parameters) Mesh angle to 25 degrees and unchecking "Add detail to inflections".

Then along with that hiding all edges also can be a big boost to screen redraw time.

If that speeds things up enough to be usable then you may not need to get a new video card, although when dealing with very heavy models you generally want to have as up to date hardware as you can.

- Michael