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[Techpowerup.com] Hack Released to Enable PhysX on Windows 7 with ATI GPU Present - i4memory.com - different look at memory
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Old 06-10-2009, 10:22 AM   #1
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[Techpowerup.com] Hack Released to Enable PhysX on Windows 7 with ATI GPU Present

For NVIDIA's PhysX technology, it has been a roller-coaster ride since NVIDIA's acquisition of the technology, and its makers. As much as PhysX quickly became one of the important selling-points of NVIDIA's consumer graphics line GeForce, it also had its small share of controversy, linked to market dynamics more than anything. With the technology's port to the GeForce GPU, enthusiasts fancied having the freedom of choice with a primary GPU that is dedicated to rendering 3D graphics, and a second GPU that is just about powerful to assign as a dedicated PhysX GPU.

Although having a powerful ATI Radeon GPU aided by a less-powerful NVIDIA GeForce GPU for PhysX was possible on Windows XP, the succeeding Windows Vista restricted this, by making sure two active display drivers couldn't coexist. Windows 7 removed this restriction, but before you could rejoice, NVIDIA quickly released a driver-level code with its 186 series drivers, that disables NVIDIA PhysX altogether when a GPU from another vendor is coexisting and enabled, even an IGP for that matter. If that wasn't bizarre enough, with the latest drivers, you can't even pair an Ageia PhysX PPU card with an ATI Radeon GPU going about its business. To the rescue comes a soft-modder's nifty bit of software that overrides this restriction from NVIDIA's drivers, so you can use dedicated GeForce PhysX cards on machines with ATI Radeon primary GPUs again. The corrective driver patch comes from tech portal NGOHQ.com community member GenL.

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