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question about a 3rd card used for physics

post #1 of 16
Thread Starter 
Hello. I'm running sli 780 ti's on an Asus z87-pro mobo and I was wondering if it were possible to run a 3rd card on this board with the ti's for physics? They have ek blocks so the bottom PCI lane is open...also which card would be fast enough to not bottleneck the 780 ti's and actually be worth adding?


Here is my build ( I have the sniper5 mobo instead of my z87 pro on the list though.

http://pcpartpicker.com/parts/partlist/
Edited by streetsports - 3/30/14 at 4:33pm
post #2 of 16
There would be no point in doing so. Your top of the line cards are far more than capable and you would see absolutely no performance benefit.
post #3 of 16
Thread Starter 
Quote:
Originally Posted by Broseidon View Post

There would be no point in doing so. Your top of the line cards are far more than capable and you would see absolutely no performance benefit.

Thanks for the response...I was only wondering because my physics scores are low in benchmarks compared to graphics scores...I have card #2 set to handle physics and one monitor and #1 card pushes the other 2 monitors...it does better that the i7 4770k @ 4.8 though...do you think a different motherboard mite help make it possible to do what I want to do?

What if I ran the extended atx gigabyte sniper5 with a non ti 780 for physics?
Edited by streetsports - 3/30/14 at 11:19am
post #4 of 16
Quote:
Originally Posted by streetsports View Post

Thanks for the response...I was only wondering because my physics scores are low in benchmarks compared to graphics scores...I have card #2 set to handle physics and one monitor and #1 card pushes the other 2 monitors...it does better that the i7 4770k @ 4.8 though...do you think a different motherboard mite help make it possible to do what I want to do?

What if I ran the extended atx gigabyte sniper5 with a non ti 780 for physics?

If you paired it with a regular 780 for physics, you would probably see some benefit. But it would be up to you whether or not the extra power consumption, noise, and heat would be worth it for the few PhysX heavy games that are currently available. People frequently try to run super-low end cards like a GT 220 for PhysX and it ends up bottlenecking the system.
post #5 of 16
Thread Starter 
Thanks again for the input...I'm honestly just bored and want to push my system a little further... I think I mite just try a mobo with 2 x16 slots at true x16 and see how that goes...the z87-pro is only 2 x8 or 1 x16 as far as I know.
post #6 of 16
Quote:
Originally Posted by streetsports View Post

Thanks again for the input...I'm honestly just bored and want to push my system a little further... I think I mite just try a mobo with 2 x16 slots at true x16 and see how that goes...the z87-pro is only 2 x8 or 1 x16 as far as I know.

That's true but those x8 lanes are pcie 3.0 meaning they are just as fast as x16 pcie 2.0

I can't see them bottlenecking you in any way.

You should fill out your rig information as it will help other to help you knowing what other parts you are running.
Upstairs Rig
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CPUMotherboardGraphicsRAM
4770k Asus Maximus VI Hero evga 1080 Ti with Hybrid mod Corsair Vengeance Pro 2133 mhz 
Hard DriveHard DriveCoolingOS
Samsung 850 EVO 500gb WD Caviar Black Corsair h100i GTX Windows 8.1 64bit 
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xb280hk EVGA Supernova 1000 G2 Corsair Carbide Air 540 
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Upstairs Rig
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post #7 of 16
General rule of thumb from my understanding of physx is you want your physx card to be half as powerful as your overall primary GPU solution to see benefits coming from it
Edited by TheReciever - 3/30/14 at 12:52pm
    
CPUMotherboardGraphicsRAM
i7 2670 @ 2.8Ghz m4600 m5100 @ 1100c/1500m 16GB DDR3 1333Mhz 
Hard DriveHard DriveHard DriveHard Drive
c300 128GB SSD 2TB FireCuda 7mm 2TB Firecuda 7mm 1TB 5400rpm 
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c300 128GB SSD 2TB FireCuda 7mm 2TB Firecuda 7mm 1TB 5400rpm 
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post #8 of 16
with the new nvidia drivers they removed support for dedicating cards for physx on older cards so 200 series cards or older are no longer supported i believe so you would need a 400 series card or higher so its not really worth it unless you already have the card too try that being said i have a 580 which is kinda old but it works with a 9800gt for physx and i gain about 5-10 fps in some games and in others i dont gain much at all so you would need something around half as fast as the cards you already have so you would be looking at a 760/680 smile.gif
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post #9 of 16
Thread Starter 
OK...I was thinking either a 770 or 780 for physics...

My setup is
4770k @ 4.8 (delidded but not naked until Wednesday )
Sli super clocked evga 780 ti's @ 1150 and 3900
16gb corsair 2133
Ton of drive space via ssd's and hdd's (os is on an ssd)
Asus z87 pro
Full watercooled setup with 4 rads, mcp655 pump (317 gph), full ek blocks on the cards (never breaks 46c) and a heatkiller 3.0 on the CPU (never breaks 68c)


I think I'm going to get the gigabyte sniper5 ext atx board to start with because I was planning on dropping $120 on vrm/mosphet coolers for the z87 pro and the gigabyte comes ready for water.
post #10 of 16
I hate to be the one to tell you this, but you stand to gain more performance in Tri SLI then you would for Physx

If that was the route to go, then I suppose where Tri SLI is buggy and the game supported physx then you could knock it down to SLI + Physx at those times.

I believe physx is primarily used to increase the bottom line. Others experiences may prove differently though
    
CPUMotherboardGraphicsRAM
i7 2670 @ 2.8Ghz m4600 m5100 @ 1100c/1500m 16GB DDR3 1333Mhz 
Hard DriveHard DriveHard DriveHard Drive
c300 128GB SSD 2TB FireCuda 7mm 2TB Firecuda 7mm 1TB 5400rpm 
Hard DriveOSMonitorPower
750GB 5400rpm Windows 10 x64  1920x1080 @90hz 150w 
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CPUMotherboardGraphicsRAM
i7 2670 @ 2.8Ghz m4600 m5100 @ 1100c/1500m 16GB DDR3 1333Mhz 
Hard DriveHard DriveHard DriveHard Drive
c300 128GB SSD 2TB FireCuda 7mm 2TB Firecuda 7mm 1TB 5400rpm 
Hard DriveOSMonitorPower
750GB 5400rpm Windows 10 x64  1920x1080 @90hz 150w 
Mouse
Corsair M40 
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