hypermemory

I am very confused does the Hypermemory Mobos have there own graphics memory ...? or it is just a normal IGP...? see here *ati.amd.com/technology/hypermemory.html it says "Graphics applications can share system memory and use fast on-board memory" what does this mean...? Also the dell...

Any one know the comparision between "128MB ATI MOBILITY RADEON X1300 HyperMemory" or "128 MB ATI MOBILITY RADEON X300". I am planning to buy a laptop for my brother with 128MB ATI MOBILITY RADEON X1300 HyperMemory. I already have one with 128 MB ATI RADEON X300. Now I am thinking to stick my...