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Author Topic: Do PPU's accelerate CPU PhysX?  (Read 7667 times)
Jr. Member
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« on: July 21, 2010, 08:13:35 AM »

A common question many noobs would ask yet a simple yes or no is still being debated in many other forums.

Those arguing yes point to the example that those owning a BFG Ageia PhysX Card will note the lights and fan spring to life when playing a CPU PhysX game like Jericho, The Last Remnant, the Mass Effect games or Borderlands.

I'd figure I should bring this question to this forum to answer this once and for all...

Will a PPU accelerate a CPU PhysX game?

...and if not,

Why do those of us owning a BFG PPU see it light up when we play a CPU PhysX game?

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« Reply #1 on: July 21, 2010, 10:04:44 AM »

Will a PPU accelerate a CPU PhysX game?
Heh.. it was a golden question in Ageia times, with long discussion on official Ageia forums.

But in generally - Yes, PPU can accelerate a CPU PhysX game, because it can run all PhysX SDK components (and even whole scene) in hardware (and GPU - only few, like cloth and particles)

Unfortunately, in non-PPU games difference was almost unnoticable, like +5 fps or so (not to mention, noone ever performed a wide test of this feature)
It's like Tony Carillo, Ageia marketing manager, told us finally:

We: Hey, does Gears of War use PPU ?
Tony: Yes, some physics calculations can be offloaded on PPU
We: Cool ! And what is the difference ?
Tony: You will not notice it.
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