• Competitor rules

    Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

Cellfactor and Physx

“be manipulated to be incredibly good at something the cpu is specifically not very good at, and make the software aimed at the ppu. while a different set of software could indeed run very well on a cpu. its a suspicion, theres no way to prove or disprove it.”
It can be proven and disproved. Just do the math. Physics require tons of internal bandwidth something CPU’s don’t have enough off..

You can also prove it by all the developers who have said and show the CPU cannot do the work. There are tech demos from ATI, Nivida and even Intel that show how even quad cores cannot handle lots of physics at once. There is not one bit of evidence to say CPU’s can do it. If it was possible someone would have downloaded a SDK and made a tech demo showing it by now.






“as i've said before many many times, you don't need 100% accuracy to model a simple falling object, its overkill to take into account every minute detail because the end result will look almost identical”
That’s very true but even if you don’t use 100% accuracy and cut down as much as you can the CPU fails due to lack of internal bandwidth and not being able to processed data in parallel two things you need for physics. Being able to process data in parallel is the reason why GPU are so much better at CPU’s for physics.

Just look at the quad core tech demos from ATI and Intel and how the CPU alone slows right down rendering physic.


Go read the white papers on how physics work and you will see CPU’s are very inefficient and a bad choice for physics.






“give it time ageia should go bust soon.“
Yeah right. How can a company that’s doing very well with 100’s of game out that use there API and 100’s more due out go bust soon? Every trade show has Ageia packed with develops trying to get a look.

Just look at all the developrs who have dropped Havok for Ageia this year alone.
 
“I still think you work for Ageia... I only ever seem to see your posts where PhysX is mentioned...”
Yeah Ageia implanted me here 5 years before they announced the PPU and before the company existed. Everyone accusing me of working for PowerVR where just my alts, it was all a cover so people wouldn’t think I worked for Ageia and I do post in lots of none Ageia threads.
 
Last edited:
can you post some recent benchmark figures and screenshots of games using physx card? would like to see how well they have progressed.
 
Street said:
I still think you work for Ageia... I only ever seem to see your posts where PhysX is mentioned... How much are they paying you? I could do with some cash and am an easy sell out as well! :p
That's 'cause he owns one.... (figures:P)
I'm just installing this on my rig (3.2ghz C2D). And from combat training, I'm guessing that this is still very cpu limited, and that my 512mb X1800XT won't bottlek things.
 
Pottsey said:
Yeah Ageia implanted me here 5 years before they announced the PPU.

Busted! Thankyou very much! What are the rates like? :)

Edit: Infact.. Joined May 2006? 5 years?... When did PhysX come out? Wasn't it about May last year? :p
 
Last edited:
“If cpu's / gpu's are so bad for physics, why does havok not slow down fps then..“
Havok does slow down FPS massive into single digits when doing soft metal, liquids and cloth. I have never seen Havok do those effects at useable speeds on the CPU.

GPU’s are not bad for physics the only problem is no game support. Tech wise a GPU is way better then a CPU for physics.

Cyber-Mav I need to get some sleep but will see what I can find tomorrow night if I get time.
 
Pottsey said:
Havok does slow down FPS massive into single digits when doing soft metal, liquids and cloth. I have never seen Havok do those effects at useable speeds on the CPU.
I'm sure we can manage without them few details and save the cash for something else. ;)
 
You do know that a x1600xt is supposedly (haven't seen any proof though, just ati) 2x better at physx processing than the agaia ppu :p
And about cellfactor. The only reason this time round that fps is affected by not having the ppu is that they've implemented the cloth effects to run on cpus, which we already knew drops the fps, badly. Also, the cloth effects are pure crap, I'll record a vid of cellfactor tomorow....
 
Squakingcow said:
You do know that a x1600xt is supposedly (haven't seen any proof though, just ati) 2x better at physx processing than the agaia ppu :p
And about cellfactor. The only reason this time round that fps is affected by not having the ppu is that they've implemented the cloth effects to run on cpus, which we already knew drops the fps, badly. Also, the cloth effects are pure crap, I'll record a vid of cellfactor tomorow....

You mean when you shoot the cloth? thats what i meant when i said i wasnt impressed...it looks like theres a lag between the bullet hitting and the cloth reacting (while at 30-40fps so it wasnt game lag..)
 
Greenboi said:
You mean when you shoot the cloth? thats what i meant when i said i wasnt impressed...it looks like theres a lag between the bullet hitting and the cloth reacting (while at 30-40fps so it wasnt game lag..)
Yeah, and it doesn't even look realistic when it 'tears' (I don't even know how they claim that, it looks pants, and the performance it looses isn't worth any of it). It just randomly produces a line through it. So imo, if it weren't for the terrible cloth, performance would be equal bettween physx, and non-physx, agia obviously wanted it to try and make it look like there was some noticeable difference in perormance bettween the two. Tomorow, I'm gonna edit some .ini's ect to get rid of the cloth effects.....
 
I played this game on my oc'ed quad with no performance loss as I had it clocked to 3.9ghz! and a single 8800gtx, I will try the fluid version in SLI and see what happens...
 
Lol, my rigs only a 3.2ghz dual core:/ (I need need to overclock it further, but I cba atm:P) With a X1800XT:/ But the cloth effects are the main thing that drain perforance on my rig, and look naf anyways, so I'm gonna turn them off......
 
my pc couldnt even run the non-physx level at a decent frame rate i doubt having a physx card wouldve made that much of a difference for me..
 
We're still awaiting these "genuine" benchmarks :P

Its kinda like the way ATi went about with the whole Half-Life 2 u need to have an ATi card to play it at its best crap! I rmemeber this game ran 2xFaster on ATi hardware when it was launched and as soon as there was Driver release from NVidia it was back to being a lot closer.

Its just one of these things, code a game for a specific peice of hardware and it will no doubt run a hell of a lot better! Simple as that! Its a great marketing ploy but with absolutely no difference to gameplay and basically making it "look prettier" its a waste of time!
 
jrodga2k5 said:
We're still awaiting these "genuine" benchmarks :P

Its kinda like the way ATi went about with the whole Half-Life 2 u need to have an ATi card to play it at its best crap! I rmemeber this game ran 2xFaster on ATi hardware when it was launched and as soon as there was Driver release from NVidia it was back to being a lot closer.

Its just one of these things, code a game for a specific peice of hardware and it will no doubt run a hell of a lot better! Simple as that! Its a great marketing ploy but with absolutely no difference to gameplay and basically making it "look prettier" its a waste of time!

Are you arguing that a CPU can run physics calculations as quickly as the PPU?
 
Back
Top Bottom