Hey all, I just changed from a crossfired pair of 6950's to a pair of GTX 680's in my system.
 
Each card by itself does very well driving my 3 x 27" monitors at 5760 resolution, but combined? The fps drops to a dismal 4-7fps in every bench and game I have tried!!
 
On the NV forums there are several 990fx chipset owners that are experiencing the same problems. So far nothing changes this.
Latest mobo drivers, bios, tried the 3.10 nvidia , and the 3.24 beta's , played with FXAA and the various vsync options.
 
I have a kill a watt power consumption meter that shows a max of 275w consumption in unique heaven' bench. Obviously the video cards are not working hard.
 
My bios shows both cards active in PCIe 2.0 x16 lanes, so it isn't a bottlekneck. CPU usage is minimal, saw under 25% during games and bench attempts. 
 
In the Nvidia tool, it shows the 2 cards in SLI and my screen resolution at 5760 x 1080. I tried setting the physx to just CPU, it had defaulted to 1 of my 680's under auto
 
Being new to SLI, am I missing something? Any advice, tips, tricks?
For now, i have to pull SLI to play, that's brutal :(
 
ASUS Crosshair V 990fx chipset
16gb corsair vengeance 1866
phenom X4 965 @ 4150mhz
 2 x GTX 680
Eco alc 240mm h20
vertex 3 120gb MI
2tb WD black caviar
3 x asus 27" ve278q monitors
 
 
 

Did you completely remove the  AMD drivers before installing the Nvidia ones?

Never do Physx as CPU. Either disable it or assign it to auto or a GTX 680. But to test, disable it.
 
And at 275W, something isn't right. Have you tried another SLI bridge connector?

cipher_nemo


Never do Physx as CPU. Either disable it or assign it to auto or a GTX 680. But to test, disable it.

And at 275W, something isn't right. Have you tried another SLI bridge connector?

Why not? Unless whatever he's doing actually uses PhysX the it wouldn't matter either way
PhysX is just Nvidia's version of physics that can run off their GPUs, so having it run off the CPU would be no different then any other games the runs physics off the CPU
 
If he's testing using 3Dmark Vantage then Physx is disabled by default, if he's testing using 3DMark 11 then PhysX isn't even used by it, so having set to CPU or GPU won't matter either way

If he is not the only one with a problem that uses a 990FX Chipset then it sounds like an issue that only Nvidia can resolve. Don't see anything else that can be done.

Yeah, tried a single flexible SLI bridge, and the hard one that attached to both bridges, no change.
 
Made no difference with Physx assigned as Auto, to the 2nd GPU or the CPU.
 
The couple programs i consistently test are unique heaven benchmark, and SWTOR - this game normally ran 60-100fps with 1 card - I see 4-5 fps in SLI!! ick...
 
Removed all the ati drivers - that was bad ...Heh! Rebooted, has no usb/ps2 active!! Had to do a Windows install disk start up repair and manually reload the usb drivers off a backup driver dvd I had made back in the day. Fortunately i had uncompressed them or i would have been screwed. Of Course, couldn't find my last restore point disk...funny how that works!
Burned a new one "just in case" !
 
A number of guys with Asus sabertooth 990fx i have come across with the same issue. I am the first Crosshair V board I have found so far, but the 2 aren't that different hardware-wise...
 
I have posted in several forums related to my hardware as well, and will keep trying, but it is looking more and more like an Nvidia issue, as there are a lot of folks with the same setup i have and 2 580GTX work just fine in SLI...
 
i appreciate the time you have taken for me!
 
Kar

To Karandar,
 
Have you tried turning off FXAA while in 2way SLI?  I'm kind of curious to know if it's like MLAA for AMD.  It drops your FPS really really low with old drivers.
 
PhsyX won't do anything if the game doesn't utilize it.  So leaving it enabled on your cpu won't do anything so long as you're playing non-physX games.
 
How did removing your AMD driver give you problems?  Can you elaborate on that?

Just a heads-up for PhysX: if you do have a DirectX app/game that utilizes it, assigning it to your CPU isn't a good idea. It will be a serious demand on your CPU that's better utilized for the app/game you're running.

Karandar


ASUS Crosshair V 990fx chipset
16gb corsair vengeance 1866
phenom X4 965 @ 4150mhz
2 x GTX 680
Eco alc 240mm h20
vertex 3 120gb MI
2tb WD black caviar
3 x asus 27" ve278q monitors

 
Lemmie get this straight. You have 2 GTX 680's in SLI, an ASUS Crosshair V 990FX, 16GB of ram and a Vertex 3 SSD BUT you're still rocking a Phenom II X4 965 back from 2009 that retails for $119.49?
 
This isn't the cause of your fps issues but you're being bottlenecked by your processor pretty hard. Grab cheap 1100T or a FX8150 as your motherboard supports AM3+ :/

I do really appreciate the effort people are putting in for me here.
 
Ahh, the old Phenom vs Bulldozer debate :) ... At low resolutions, or with games like Civ5, you are very correct. My aging CPU is showing it's limitations. However, at high resolutions, like the 5760 x 1080 I am running, with most games, it is still a GPU bottlenkeck.- I suspect not once I get these 680's figured out though!
The Phenom x4 at 4150mhz consistently beats even an overclocked Bulldozer. My G15 shows very few instances where my cpu is over 60% and most often under 50%. I will drop a Piledriver in this board this fall when they finally come out.
I am anxiously waiting to see how Ivy performs in a couple weeks, and will be likely grabbing one of those, or a Sandy Bridge E platform.But in the mean time, I really want to figure out this system trouble :)
 
I tried again this morning manually running through the registry and system removing every reference to amd/ati, and removing the nvidia drivers and then reinstalling the motherboard and nvidia 3.24 drivers.

Using the default nvidia control panel settings of auto on physyx(have also tried cpu, and disabling), it has chosen card 2 for that. I tried disabling FXAA. no change on any of these settings

GPUZ see's both GPU's in PCIe 2.0 x16 lanes
It also tells me they are in SLI mode

All information is the same in GPUZ except the bios versions

MSI displays 80.04.09.00.01 (p2002-000)
Asus :          80.04.09.00.0f (p2002-000)

Subvendor MSI : Nvidia (10DE)
               ASUS :  Asus(1043)
 
Being both reference cards, a person could end up flashing 1 of them to match if that is what it comes down to, but with 2 reference cards, A guy would think they should play nice together... (Famous last words!?)
 
 

Well with my SLi, if I leave PhyX on auto it assigns my 2nd GPU as the PhyX card, so I force CPU as PhyX. Never had a decline in performance, not sure why it would be affecting someone else negatively.

Just tried 1 last thing, had an older Raptor kicking around, so formatted it , did a vanilla install with fresh drivers, no Fix :( 
 
From the various forums i am following, it is affecting 9xx series chipset owners, several Sabertooth, Crosshair V(me) and one MSI GD80

Well guys, just got some bad news. HiVizMan from the Asus ROG forum has spent a massive amount of time built a Crosshair V system like mine, tried to find a fix for us for the SLI 680GTX fps issue...Could NOT find anything that helped. He went WAY above and beyond the call to help ...

It would appear Nvidia didn't take the time to fully validate 680GTX in SLI on AMD 9xx chipsets.
I have done a ton of forum searching to see if I could find a solution to our problem and/or ANY 9xx user that was successfully running SLI 680's ...So far that would be no one... :(

so, i don't know what to do. running out of time to RMA my GTX680 cards fast.

Will nvidia come out with a fix in the next drivers? ...or ever? It's not like it is just poor scaling. Adding the 2nd card makes EVERYTHING unplayable ...and there are a surprising number of us in the same boat. spend near 1100.00 worth of cards we cannot use :(

There are 7970's avail, but most of the custom cards that run close to the 680 performance are very hard to find in stock ...

Build a Sandy Bridge E platform for the 680's? that's a lot of money to make video work like it was advertised to work ...

I dunno, very angry and frustrated at Nvidia atm...

If it's a driver issue, then Nvidia will need to address it.  This of course is assuming your board can use either AMD or Nvidia graphics cards.
 
I don't fully understand how you can play SWTOR fine with a single card, but you can't do it with 2-way SLI.  You didn't mention anything about your PSU.  We don't know if you're running enough juice into both cards.  Assuming your not getting a bottleneck in your cpu--you haven't mention that you are monitoring this while trying to load a game or benchmark in SLI--the only other problem could be with the Nvidia chip on the board.  Seeing as how it's affecting different AMD processor mobos, from different vendors, I doubt it's the mobo itself.  Have you check on the Nvidia forums about this problem, or addressed this problem to them?

I'd like to know what type of PSU do you have?

My Original PSU was a seasonic m12d 750, I am currently running a Corsair 1000HX, power shouldn't be an issue.
 
Both successfully run heavily overclocked shader unlocked 6950's in Crossfire.
 
The Asus Crosshair V motherboard supports both SLI and Crossfire.
 
Monitoring CPU usage with single and dual 680's I seldom any cores above 50% in the applications I have runwith my cpu at 4150mhz. I have also tried running my platform completely stock...
 
Yes, I have submitted a ticket to Nvidia, as well as several forums including Asus, Republic of gamers where they built a similar system to mine, duplicated the problem spent over a week trying, but could not solve the issue causing the drop in FPS to just 5fps ...
 
This seems to be an Nvidia/AMD thing. it isn't just asus, I have found users of CrosshairV, Sabertooth, MSI Gd80, and a gigabyte ...I think 8 of us atm, maybe more. I have actually not found an AMD user posting claiming to be successfully using 680's in SLI yet...
 
Kar
 
 

That HiVizMan is a saint, he go's above and beyond to help everyone. While changing platforms to an intel may be a hefty price, I believe you would be happy you did

Ivy Bridge just launched today, grab one of those with a 7 series motherboard and get the benefits of PCI-E 3.0 which is proper for your vid cards.

HiVizMan is possibly the best support person I have ever had the pleasure to deal with. I honestly believe this is an Nvidia problem, not an AMD 9xx problem, let alone an ASUS problem.Amazing he put as much effort in as he has :)
 
looks like an Intel platform is what I will have to go for all right.
 
I would think Eventually Nvidia will have a fix, but that may not be before I was planning to upgrade the platform anyway...Who needs a savings account anyways eh?! ;)
 
I am still on the fence about Ivy Bridge ...yes, stock power consumption and such it is a great chip, but the many different reviewers concerned about the very high overclock temperatures bothers me.
Also, because of these temps, Sandy Bridge overclocks consistently better, meaning not really any better performance running Ivy ...
 
Hmmmm ....
 
 

Heh! Just pulled the pin and ordered a new platform for my pair of 680's and 1000w PSU sitting here getting lonely... Ivy offeres PCIe 3.0 which helps the weakest link of Intels mainstream platforms - not enough PCIe lanes ...

Asus z77 Sabertooth motherboard
Ivy Bridge 3770k cpu.
16gb Low profile Corsair vengeance DDR3 1600 9-9-9-24
Corsair H100 water cooling
Corsair performance pro 256mb SSD
1tb Caviar black,
2tb Caviar green(for backups)
Logitech G510 keyboard
Win 7 Pro 64
Corsair Carbide 500R case
Asus 24x dvd drive

That's  better balanced hardware anyway :)

Congrats, that should be a very good match for those 680's I'm sure you'll be happy

I can reproduce the same issue, if I don't go an manually set SLI for the BF3 in the NVidia control pannel.  Set it to the "recommended".  Even if it currently says it is set to Recommended.  ... change it, and change it back to recommened.  Then hit apply.

Karandar


Hey all, I just changed from a crossfired pair of 6950's to a pair of GTX 680's in my system.

Each card by itself does very well driving my 3 x 27" monitors at 5760 resolution, but combined? The fps drops to a dismal 4-7fps in every bench and game I have tried!!

On the NV forums there are several 990fx chipset owners that are experiencing the same problems. So far nothing changes this.
Latest mobo drivers, bios, tried the 3.10 nvidia , and the 3.24 beta's , played with FXAA and the various vsync options.

I have a kill a watt power consumption meter that shows a max of 275w consumption in unique heaven' bench. Obviously the video cards are not working hard.

My bios shows both cards active in PCIe 2.0 x16 lanes, so it isn't a bottlekneck. CPU usage is minimal, saw under 25% during games and bench attempts. 

In the Nvidia tool, it shows the 2 cards in SLI and my screen resolution at 5760 x 1080. I tried setting the physx to just CPU, it had defaulted to 1 of my 680's under auto

Being new to SLI, am I missing something? Any advice, tips, tricks?
For now, i have to pull SLI to play, that's brutal :(

ASUS Crosshair V 990fx chipset
16gb corsair vengeance 1866
phenom X4 965 @ 4150mhz
2 x GTX 680
Eco alc 240mm h20
vertex 3 120gb MI
2tb WD black caviar
3 x asus 27" ve278q monitors
 
I have almost the same system specs.
ASUS Crosshair V 990fx chipset
8gb Gskill 1866
FX-8150 @ 4415mhz
2 x GTX 680
 Antec   920 liquid cool system
1tb Seagate constellation
 
I am experiencing the same problem but with 3dvision for 3d. Work with 1 video card. Only crysis2 and bf3 work ok.
I suspect the chipset driver not compatible with the new GTX680 SLI.
 

<message edited by pstlouis on Monday, April 30, 2012 8:48 AM>

JediNachos


I can reproduce the same issue, if I don't go an manually set SLI for the BF3 in the NVidia control pannel.  Set it to the "recommended".  Even if it currently says it is set to Recommended.  ... change it, and change it back to recommened.  Then hit apply.

So the issue can be fixed then?

I have the same issue with all my games at res of 2560 x 1600
ive tried disabling sli using phys x on gpu,
my fram rate is around 30 on bf3 then plummets to less than 10 after a while?
any solution on this very odd behaviour?

Zegahertz


I have the same issue with all my games at res of 2560 x 1600
ive tried disabling sli using phys x on gpu,
my fram rate is around 30 on bf3 then plummets to less than 10 after a while?
any solution on this very odd behaviour?

What are you running with?

asus mars 2 graphic card
i7 965 cpu
12gb ram
1300 watt psu a
asus p6t deluxe mobo
ocz vertex 2 ssd
 
Also i get much higher STEADY frames when i play windowed (to about 40 percent of the screen
If someone fixes this i will reward them with a graphic card

you said you unindtalled your video drivers first, but did you run driver sweeper and ccleaner in safe mode?

Man, if I had an Asus Mars II, I wouldn't even take it out of the box.  That thing will probably be worth money in 10 years as a collectors item, in cherry condition...

The problems us AMD users are experiencing is 3 monitor surround and 680GTX SLI ...doesn;t work, 310w max power draw on my rig.
 
Go to single monitor SLI, power draw jumps to 450w and fps improves dramatically at 5670 x 1080...