your graphic card is handling all of the rendering, so for each unit you see, the GPU has to process and display all of the texture etc,. So yes, the graphics card has to work harder the more units there are, and that can kill your frame rate.
If your HD is beeing accessed when you zoom in it sounds like you are swapping textures from virtual memory (HD space) to RAM or GPU RAM.MGG=REVIEWS said:Huh... it does run better but it still lags quite a bit with a few units on screen any way to fix that withought lowering unit detail
edit: also when i zoom into units the game become jaggy and my hardrive begins to make strange noises
Now that I have thought about this a bit, I agree with TechNoFear, if you are hearing you hard disk then ram shortage is the likely culprit. I would vote for a new graphics card, 9800 gtx and HD 4850 both offer solid performance at around $140 U.S.TechNoFear said:If your HD is beeing accessed when you zoom in it sounds like you are swapping textures from virtual memory (HD space) to RAM or GPU RAM.MGG=REVIEWS said:Huh... it does run better but it still lags quite a bit with a few units on screen any way to fix that withought lowering unit detail
edit: also when i zoom into units the game become jaggy and my hardrive begins to make strange noises
I think your bottleneck is the 256Mb of GPU RAM, not the cards GPU.