Graphics card issue?

Hi

Draftsight is very slow to pan and zoom on my x64 windows 7 machine.I have already tried the following:

I have minimised the file size by removing any meta data as suggested here: https://swym.3ds.com/#community:70/iquestions:753 (this actually increased the x-ref file size...). No difference.

I have tried reducing the precision in the units dialogue, no effect.

I have run the graphics card test (https://swym.3ds.com/#post:980). This does speed up the zooming, although it's not as fast as I would expect. However, it also stops some, but not all blocks from being displayed.

The machine seems to have a standard intel graphics accelerator, the driver is up to date. The machine is about 2 years old, has 8gb of RAM and 2.7 GHz processor. It has had a clean windows install a few months ago.

Is it worth trying a graphics card upgrade? Is there some other issue causing this poor performance?

 

Thanks