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GTX 470 SLI is it worth getting a 9800GT for PhysX? - Page 3

post #21 of 32
I played the whole game maxed at 1920x1200 on my 470's in SLI, and whilst the large majority of the time, they handle the game with ease, there are definitely isolated times in Mafia 2 (for example, around the Maltese Falcon bar) where it bogs down into the high 20's due to physX load. It's not unplayable, and fortunately it never happened in firefight scenes, but it is annoying. And having a dedicated physX card removes the lag from these parts from the game.
    
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post #22 of 32
Quote:
Originally Posted by brettjv View Post
I played the whole game maxed at 1920x1200 on my 470's in SLI, and whilst the large majority of the time, they handle the game with ease, there are definitely isolated times in Mafia 2 (for example, around the Maltese Falcon bar) where it bogs down into the high 20's due to physX load. It's not unplayable, and fortunately it never happened in firefight scenes, but it is annoying. And having a dedicated physX card removes the lag from these parts from the game.
but sticking to the topic..if not ONLY mafia 2 is considered well the GTX470 does end up as beefy as Physx card itself..well let's just wait for the OP to decide..given the facts(yeah yeah all Mafia 2 based)
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post #23 of 32
It seems as though the game off loaded some work to the CPU, the higher my overclock, the more the card was bottlenecked, however with stock settings the particle effects of physx often never showed up, or appeared in a less dense fashion.

It would be my guess the game tried to do the physx work, but couldn't render it fast enough or enough of it and just skipped it.

Here is the gpu usage, first test is overclocked 850 core settings same as before. Second test is at stock, notice the bottleneck seems to be almost gone yet I will swear to the grave the there was far less "effects" at stock, than even when overclocked, and I would say even less when overclocked than with a dedicated card. It also seems as though even when overclocked the effects sorta tapered off as well.

I hope that makes sense, I wonder if anyone can test to confirm.



I'm going to forgo adding it to my chart until someone can either confirm or deny what I experienced.

Stock - phsyx on primary:

Frames, Time (ms), Min, Max, Avg
4842, 124348, 24, 54, 38.939

Overclocked Physx on primary:

Frames, Time (ms), Min, Max, Avg
5518, 123647, 30, 71, 44.627


Edit: I ran it again at stock and this time it seemed to work better... I think the benchmark is just buggy (ie, crappy)


Second run at stock results:
Frames, Time (ms), Min, Max, Avg
4597, 124567, 24, 53, 36.904
Edited by BallaTheFeared - 4/12/11 at 3:10am
    
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post #24 of 32
Updated Graph:

    
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post #25 of 32
I don't think Mafia 2 IG benchmark is trustworthy.
But based on those stastics, it seems that a single GTX 470 would perform flawlessly with everything on max, since that is exactly what I got with my GTX 480 few months ago (IG benchmark tool), with HT off since Mafia 2 seemed to take no advantage from HT at all. CPU plays an important role I think.
How about the ingame FPS? IMHO, it's doubled or somewhat like that, am I right?
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post #26 of 32
Dunno, I only install the Demo after OS wipes since its small and I don't actually play the game anymore

Even with SLI 470s though the 9800GT helps, without it the 470s just barely get above 60 fps average, with it they muster close to 80 which is pretty respectable imo.



I dunno if I'd get a dedicated Physx card, but it doesn't hurt and you can always use it for folding. 9800s should be sub $50 used by now, if not a GTS 450 goes for about $85 new and they're good for like 9k PPD.
Edited by BallaTheFeared - 4/12/11 at 3:29am
    
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post #27 of 32
Actually the retail game benchmark is pretty accurate, and the demo had some consistency issues, especially with SLI/CFX.

Quote:
How about the ingame FPS? IMHO, it's doubled or somewhat like that, am I right?
Na, it won't double. It will usually around the avg you get on the benchmark. A bit higher in most cases, a bit lower in very heavy scenes.
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post #28 of 32
Well, if my memory serves me right, CPU will be free if there is a dedicated Physx card.
Quote:
Originally Posted by Defoler
Na, it won't double. It will usually around the avg you get on the benchmark. A bit higher in most cases, a bit lower in very heavy scenes.
Well, I'll test it myself when my mobo arrives, this sounds completely strange from what I've seen anyway.
Edited by Mr.Cigar - 4/12/11 at 3:47am
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post #29 of 32
[QUOTE=Mr.Cigar;13094824]Well, if my memory serves me right, CPU will be free if there is a dedicated Physx card.[QUOTE]

CPU won't be free. It will still be utilized (depends on the CPU) around the 40% with a dedicated physx card.
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post #30 of 32
I mean free from Physx. Of course it won't be really free for a game like Mafia 2, that's obvious.
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