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bye bye 980Ti sli

David230

David230

David230

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Joined
17 Dec 2005
Posts
722
Where did it all go wrong??

Until recently I had been running all my games at max settings possible with SLI performing well enough to keep every game locked on 60fps?

Now to my issue and in particular fallout 4 and hitman.. I was getting 60fps + constant with my oc'd Ti's but now both have fallen massively and I am lucky to see 40-45fps!

Dont know what I was doing right before or what has gone wrong now but nothing I do has made a difference to this recent degradation. To the point I have tried win7, win 8.1 and win10 with different driver combos but nothing changes the 40ish fps with sli scenario!

I even tried rolling back fallout 4 to see if that was the issue as I was running out of ideas!

One thing I can say about the lastest 376.33 driver though, is my VR performance has improved and my single gpu performance is beast. Fallout 4 max possible settings with godrays on high not ultra and I hit constant 60fps @ 4k on one 980TI!!

I dont want to do away with my sli setup if I can help it as I know what it can do and what it has done for me in that past. There must be some permutation of drivers and patches that allow me to get back my original performance. :(

At this rate I may be selling two waterblocked 980Ti's when the 1080ti finally falls..
 
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I am seeing more and more of this lately... SLI seems to have gone down the toilet in respect to performance. Friend of mine has had a similar experience to you with x2 970s, and is now going single card. For the cost outlay it's definitely not worth it as things stand, and I don't know if that will change in the future, especially with devs becoming more console-centric.
 
A conspiracy theorist would say it's to get people purchasing the more expensive single GPU instead of going for 2 lower GPU's that work out cheaper and "should" give better performance.

2 x 1070's should spank a TX (Pascal) for example but they rarely do in benchmarks.
 
It will probably get worse before it improves.

However once games are developed from the ground up with DX12 and it's multi GPU technology then we may see a renaissance in xfire and sli in the coming years.
 
I would agree but only two days ago I was gaming in sli quite nicely on fallout 4. Along comes a cumulative update for win10 and **** hits the fan.. I created a seperate install of fallout 4 under a older version of win10 with nvidia 372.90 drivers which had been working. rolledback fallout4 to a previous version but no joy.. I even tried other os's. Something crazy happens where it holds at around 40 fps regardless of any vsync or not..

Its nothing new I know with less and less sli profiling enabled (latest nvidia driver disabling titanfall 2 sli profile for example) but I was feeling quite happy with my system running the way it was literally right up until a few days ago..

I might have to admit defeat unless anyone can help..
 
Try changing the power management setting in the nVidia control panel - the newish and now default "optimal" setting seems to cause problems for some people.
 
I went 970 SLi so I could run Overwatch on Ultra at 144fps, which it used to do with ease. These days some maps drop to the 80's at certain points, and it doesn't feel as smooth as before. I've never been a believer in the whole conspiracy and I'm sure most of it is in my head but I can't wait for Vega so I can move on from dual GPUs.
 
sold my two gtx 980tis. the stuttering and performance problems were just not worth it. often times, one card would just not function in SLI until i restarted the PC. waiting on 1080ti now
 
David230 said:
No but I recently installed a new inatek usb card which meant removing the bridge in order for me to do so.

Will check that out.
Click to expand...

This may have bought to light my problem.. Just trying something out with the usb 3 card removed. I went into bios where normally I would see both pci express lanes for the graphics cards displaying at x16 because my board allows this however, slot 1 was displaying x4. I have now removed the usb 3 card and both graphics lanes are back to x16..

Lets see what happens..

I'll get back to you!
 
David230 said:
This may have bought to light my problem.. Just trying something out with the usb 3 card removed. I went into bios where normally I would see both pci express lanes for the graphics cards displaying at x16 because my board allows this however, slot 1 was displaying x4. I have now removed the usb 3 card and both graphics lanes are back to x16..

Lets see what happens..

I'll get back to you!
Click to expand...

Would be interested to see your findings.

P.S. Very happy 980Ti SLI user here. I run on x99 and 5930k with full fat x16 lanes and I very rarely have any problems these days apart from a handful of games that flat out don't work with SLI. A few games I've had to tweak SLI bits using Nvidia inspector (Deus Ex MD, Rise of the Tombraider and Titanfall 2 for example) but I've ended up with great performance I'm happy with. And tinkering is sort of part of the fun(?) of PC gaming...

On my previous build I had 780Ti SLI on an Asrock z68 board and had all sorts of issues with that - stuttering and judder being the worst. Get none of that with my new build as above.
 
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I have dropped SLI of my 980 sc long time ago and moved to single 1070 much much better quieter and silent. SLI nowadays its a scam which nvidia should be held responsible... lack of support etc
 
peterhc said:
I have dropped SLI of my 980 sc long time ago and moved to single 1070 much much better quieter and silent. SLI nowadays its a scam which nvidia should be held responsible... lack of support etc
Click to expand...

Thing is it isn't so much on nVidia's end - mGPU in generally doesn't work so well with advanced use of DX11 and newer APIs due to amongst other things the amount of use of functionality that requires accessing the data from the previous frame that could be residing on the wrong GPU - and most developers don't design their games with consideration as to how a feature implementation impacts on mGPU compatibility.

Its a common misconception - there is very little today that a developer can use to take advantage of multi GPU or program for it specifically its more a game happens to take advantage of multi GPU or it breaks compatibility - sometimes there are things nVidia can patch in the driver side to brute force it into working sometimes with a bit of back and forth with the developer but often quite a lot of restrictions.

In the future with explicit multi-adaptor, etc. then developers will be able to intentionally harness the power of multi GPU for the way it suits their game best.

This is why GTX470 SLI was my last SLI setup and I didn't rush to it with the 780 or 1070.
 
Ha, sli problem solved- I knew as soon as I loaded up a game things were ok again.

I now have solid performance once again with sli.. I've not put the usb 3 card back but it looks like some sort of conflict with this inatek board I purchased..

Will try and find out what later but for now atleast sli is back!
 
peterhc said:
is your usb card pcie ?
Click to expand...

Yes its a x1 board that I was using in a x1 slot. I might try it in one of the lower x16 slots anyway as it would be easier to install/remove (watercooling block in the way) and see how it handles it there.

Not sure how it would affect the sli lanes the way it did though..? Infact I dont think it did initially as like I said before it was working only a couple of days ago..
 
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