Hi all, I have a system with the specs as shown in my profile. I'm planning on buying a Radeon HD 4770 as an upgrade for the GPU. My 8400GS has been working fine and I don't really want to scrap it. 1.Can I use it with the AMD 4770 card in combination, as a Physx only card? 2.Is there anyway I can configure my 8400GS to handle only Physx and the Radeon card for the graphics? I game at 1280 x 1024 resolution.