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Physx

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Hi, i recently decided to upgrade my computer quite a lot, i decided to upgrade my motherboard to a z77 extreme 9 and buy another gtx580 meaning i would have 2 in sli.
Im currently waiting for the second 580 to arrive and today i managed to grab a gtx470 off ebay very cheap, £40 cheap.
I bought the 470 to make a few quid by selling it on straight away but now im thinking i might use it as a dedicated physx card.
I do play physx games, batman being the major one.
Will i see a performance boost from the 470 as a physx card, even if its a small boost ill be happy and prob end up keeping the card.

Another question is power, my power supply is a Xigmatek Centauro 1000W Power Supply -http://www.overclockers.co.uk/showproduct.php?prodid=CA...

Its on the nvidia certified list for 2 580s but im unsure if it will power the 470 as a physx card, i know it will never be maxed because its doing physx, do you think it will be ok?

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Graphics card Master
Motherboard Expert

You will see a performance increase in a game like batman arkham city however with a dedicated physx card you don't need much for example there are benchmarks that show that once you go beyond the speed of a gtx650 you no longer gain frames.
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Graphics card Master
Motherboard Expert

Dude with Arkham city you'll be fine. I would definitely say you would be fine with 2 580's in sli. My 670 kicks tail with physx on high. I recently picked up a 1920x1080 screen my numbers dropped a little but nothing crazy maybe a few here and few there.



I know ill be able to play it no problem, ive been playing no problem on one 580, it will be good to mess around with and see the results, im still a bit concerned about power though.
I also have 3d vision which with batman is good but frames are horrid, i dont use it that much as im not really that much into 3d, i bought it for the monitor more than anything but it will be good to see if it plays smooth insted of 25 - 30 fps average.
Graphics card Master
Motherboard Expert

oh certainly having a dedicated graphics card will help with the physx portion. You don't use as much power using the card as a physx card. You should be good on the power end however its really hard to say I know 3 graphic cards in sli uses a ton of power I haven't seen a sli+dedicated physx card setup before. When you do this you can check your power consumption no with a program like afterburner?
Graphics card Master
Motherboard Expert

Looking around at tri 580's to give myself an idea of how much power you would need. People are saying you would need around 60 amps on the 12v rail which is around 720 watts in which case you have 75 amps which amounts to 900 watts on the 12v rail you should be good I would say.

just had a read, im convinced now that i could run the 2 580s and the 470 but not 3 580s, i overclock my cpu so im looking at a few extra watts there, i use a i5 ivy and im looking at getting it stable at 4.8 @ 1.37v which should be easy now ive removed the ihs and replaced the tim.
Ive not had chance to test it yet proper.
Graphics card Master
Motherboard Expert

replaced what "ihs, and replaced the tim"? Yea once you go beyond 2 the power requirements ramp up a bit from what I remember. I was just trying to use a benching point since I have a hard time finding 12v amp requirements on video cards anymore.

I'm wondering, if anyone can explain this post to me. So you can have 2 cards in SLI and have a 3rd be a dedicated PhysX card? How's this possible??? Can you have 1 card that is your video card and a second be a Physx card? Any reading material on this?
Graphics card Master
Motherboard Expert

Well the physx card is not connected through the sli bridge what you do is you have the 2 cards in sli and the one just connected. You could have for example two 580's and just disconnect the bridge and use the 2nd 580 as a dedicated card its fairly easy.

Read it thanks! So, it seems that SLI will give better performance than doing a dedicated PhysX because if I read it correctly, framerates will take a hit with a dedicated PhysX card and a dedicated PhysX card is not needed if you have Nvidia 500 cards or higher?
Graphics card Master
Motherboard Expert

Firstly , let me say you do not need two 680's at the present time. The reason the poster would more then likely need more then one card is primarily do to the fact that he is using a 3D vision setup. I used Batman Arkham city as a example because its DX11 game that is extremely taxing on computers now and when you add Physx on high and tesselation and AA+AF you end up with a crazy amount of resource draw. What I would suggest for you is this if you want.

Grab a gtx670 and if you need for physx use your 570 as a physx card. You do not need to use a sli bridge just plug it in like normal and go into nvidia control panel and set your physx settings to that card.

bigshooter 8 is right, 2 680s are a bit much, especially with a 570 for physx but yes it would work, if your running a single 1080p monitor it would be overkill, anything over 100fps and you wont notice any difference, it would be good to have though.
Those types of systems are used for 3d and triple monitor setups.

bigshootr8 said:
Firstly , let me say you do not need two 680's at the present time. The reason the poster would more then likely need more then one card is primarily do to the fact that he is using a 3D vision setup. I used Batman Arkham city as a example because its DX11 game that is extremely taxing on computers now and when you add Physx on high and tesselation and AA+AF you end up with a crazy amount of resource draw. What I would suggest for you is this if you want.

Grab a gtx670 and if you need for physx use your 570 as a physx card. You do not need to use a sli bridge just plug it in like normal and go into nvidia control panel and set your physx settings to that card.



Interesting. The regular Twin Frozr MSI 570GTX is $279. Very intriguing to get that then, SLI it, wait for spring and if anything great comes out....sell them and get new PCIe 3.0 card(s).

The fact that the keplers are 256bit makes me wonder.

Hmm what to do???? I see 670 and 570GTX for Physx/ Bigshooter; would it be a waist to do this? Is there a way to monitor the framerates and see if my system takes a hit? GPU-z?
Graphics card Master
Motherboard Expert

Honestly, I think with the card you now now I would wait till something better comes out I don't see the need to buy a 600 card when you have a high end 500 series card just saying. You aren't doing 3d or so you haven't said. You play a rts game that isn't all that demanding. Unless you are wanting ultra settings in bf3 with max AA+AF you will be fine.

i have to agree with bigshootr8, the 6 series of cards are only overclocked 5 series anyway, i know for a fact the 580 at 1ghz performs exactly the same as the 680 at 1ghz, all the bells and whistles that nvidia said the 6xx cards have came out in drivers for the 5xx cards.
If you want to upgrade grab a cheap 570 off ebay and wait till the 7xx cards come out, the 6xx series was a disappointment

2 560ti roughly would perform the same as a 670 with the 560ti slightly beating the 670, the 6 series was a disappointment because the die shrink could take more power meaning higher clocks meaning a really beefy set of cards, insted nvidia put the clocks up a little and started heavily reducing size in every department.
If they had kept things that same power and size wise they could of heavily increased clock speeds, but as everyone knows that will be the 7xx cards
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