i am working on another new build for a friend and I was wandering is it possible to run 2 5970 Sapphire Toxic 4Gb and also an Evga Gtx 480 for physix.I just saw with my own eyes that it works with just 1 5970 + the 480 for physix.having 2 5970's Probably doesnt support bandwidth.Just a question.
He's actually not talking about Hydra, though... If looking to run an nVidia card for PhysX, I'd get something like an 8600GT, 9500GT, or GT 220.
You don't something powerful to do PhysX calculations, with a 9500GT, I got just as good of a framerate in PhysX games as I did with an 8800GT doing PhysX (main card for processing the graphics was an ATI HD4830).
A 480 for PhysX is super mega overkill. Tops you'll want something like a GT 280. Also there are issues with running crossfire 5970s in some games. IMO spend half as much and get crossfire 5870s which will still destroy all games. My OCed crossfire 5850s can run anything at max - Crysis and Crysis: Warhead at highest settings (Crysis 2xAA, C:W 4xAA) with average 50+fps, and Metro 2033 everything maxed DX 11 with tesslation and depth of field, plus using advanced PhysX on a GT 240 and again it gets 50+ average fps. Also the GT240 generally only goes to about 20% usage at max 30%, although a game like Batman would certainly stress it harder.
As for Physix support in the mixture ATI/Nvidia cards - HYDRA allows you to allocate the Physics to the Nvidia card while the other ATI cards can enhance the graphics - so you can enjoy both worlds
As for the graphics cards with HYDRA - you are correct - the first graphics card to include HYDRA is by powercolor and it was already shown in Computex. With this type of card - you can use your motherboard that does not have HYDRA ASIC on it and still fully benefit from the HYDRA engine