Sign in with
Sign up | Sign in
Your question

Any way to improve SLI

Last response: in Graphics & Displays
Share
January 2, 2012 1:57:26 PM

Alright mentlegen, I need some help!

I just recently received my second GTX 460 for use in an SLI setup.
I have SLI enabled in the Nvidia Control Panel, but when I play games to look for visible improvements, the framerates don't seem to be that much better, as I had hoped. I have a few questions:

-Is there any way to improve SLI performance past the Nvidia Control Panel settings?

-What does the SLI visual indicator indicate, usage? efficiency? What?

-Would running two monitors reduce performance?

-I have a game (Crysis, for example) running on my main monitor, and a GPU monitor running on my second monitor, I'm not getting the best frames possible, and it looks like the graphics cards aren't using as much as they should be, for the frames I'm getting. I could be getting 40 frames or so on Crysis and the second card will be running at about 50% usage. Is this normal?

Any information would be helpful!

Thanks,
~Kirk

More about : improve sli

a c 271 U Graphics card
a b C Monitor
January 2, 2012 2:02:41 PM

What happens if you only run one monitor?
m
0
l
January 2, 2012 2:03:54 PM

I'll give it a shot.
m
0
l
Related resources
January 2, 2012 2:11:11 PM

Same problem, Running Crysis on very high, No MSAA, 20-30 FPS.

AMD 965 - 3.4GHz
GTX 460 x2
Asus M4N98TD Evo Mobo
16GB DDR3 1333
800W PSU
m
0
l
January 2, 2012 2:18:19 PM

But the cards aren't running at load, so my logic would tell me they should start handling more to make it run smoother.

But then again, I don't know much past your signature in the way of video cards.
m
0
l
a c 271 U Graphics card
a b C Monitor
January 2, 2012 2:24:12 PM

What res are you running at?
m
0
l
January 2, 2012 2:25:37 PM

1920x1080 for both.
1920x1080 for the single monitor test.
m
0
l
a b U Graphics card
January 2, 2012 2:30:05 PM

Do you have the SLI jumper between the 2 cards?
m
0
l
January 2, 2012 2:31:00 PM

Yessir.
m
0
l
a c 271 U Graphics card
a b C Monitor
January 2, 2012 2:35:23 PM

If you run your CPU at the default clock speed does your framerate decrease or stay the same?
m
0
l
January 2, 2012 2:37:21 PM

It's at clock as is, I'll get Pheonomtweaker and check.
m
0
l
January 2, 2012 2:41:41 PM

And other games?
m
0
l
a c 271 U Graphics card
a b C Monitor
January 2, 2012 2:42:05 PM

Your sig claims 4.1ghz.
m
0
l
January 2, 2012 2:44:08 PM

Frames stay the same.
m
0
l
January 2, 2012 2:45:24 PM

I had it at 4.1GHz, but I was testing an issue with my wireless card that someone suggested, but have been too lazy to throw it back to 4.1

I'll do that now, as long as I'm dinkin' around.
m
0
l
a c 172 U Graphics card
a b C Monitor
January 2, 2012 2:47:18 PM

Bump the clocks on the cpu and report back. Sound like either the cpu or an i/o bottleneck.
m
0
l
January 2, 2012 2:50:08 PM

Alright, from 3.4 to 4.1, gonna test now.
m
0
l
a b U Graphics card
a b C Monitor
January 2, 2012 2:52:48 PM

The GPU2 thingy that pops up in the top right when SLI is turned on is useless. It will say GPU2: 50% when the 2nd GPU isn't doing anything at all. Download MSI afterburner it will show you both cards usage individually, and try a game other than Crysis, parts of that game are heavily CPU dependent and won't let your GPU setup stretch its legs.

And running 2 monitors will definately reduce performance, and if one of those monitors is plugged into the 2nd GPU SLI won't work at all.
m
0
l
January 2, 2012 2:56:11 PM

Frames increased by about 5-8 FPS, not exactly what I was looking for, but it's an improvement.

I have afterburner, I'll check that out.
m
0
l
a b U Graphics card
January 2, 2012 3:02:51 PM

Are you running games fullscreen or windowed-mode (including borderless window)?
m
0
l
January 2, 2012 3:05:49 PM

Fullscreen.

I also tested Skyrim just now on Ultra, I get 40-60 frames, but I find it odd that when the frames are lower, there's less GPU usage, and vice versa. I mean, I get how that makes sense, but I don't understand why it would do that.
m
0
l
a b U Graphics card
January 2, 2012 3:07:40 PM

Go to Nvidia control panel. Set SLI and PhysX configuration. Set to Maximize 3D performance. You should see about a 170% to 190% bump in frame rates from a single card. Also, you can overclock GTX 460's quite generously without adding voltage.
m
0
l
a b U Graphics card
January 2, 2012 3:08:26 PM

It may be a driver issue. Try deleting and reinstalling the GPU driver.
m
0
l
January 2, 2012 3:14:19 PM

I already have SLI all set up, I was just wondering if there was any tweaks I could throw in to boost my performance further.
m
0
l
a b U Graphics card
January 2, 2012 3:32:50 PM

I didn't see any FPS improvements in Skyrim enabling my second GTX 480. The only thing I saw was more issues in the game.
m
0
l
January 2, 2012 3:41:38 PM

@DelroyMonjo

That makes me feel better, then c:
Running 1920x1080

No voltage bump is set at 1075, and max is like 1087, but I'll leave the voltage alone.

Set at 850/1700/2000, About to head to the store, which should take about an hour. Furmark for testing stability?

-Stability test
-Displacement mapping
-Fullscreen; 1920x1080
-8x MSAA

Would that be sufficient?
m
0
l
a c 172 U Graphics card
a b C Monitor
January 2, 2012 4:36:37 PM

OK despite problems sometimes call for desperate solutions. Disable the virtual memory page file and reboot the system. There should be a small bump and better min fps. Also what are the ram timings on your rig? Stock or slightly raised?

One the side how fast is your boot/application drive?
m
0
l
January 2, 2012 4:42:16 PM

Ran the 850/1700/2000 for a little over an hour, GPU 1 stays at 93 degrees C under load.

@nforce4max, You're going to have to put that in some simpler terms, as I am a noob with terminology.
m
0
l
a c 172 U Graphics card
a b C Monitor
January 2, 2012 4:48:11 PM

Start
Control Panel
System
Advanced system settings
Advanced
Performance
Advanced
In the box that it says Virtual memory click Change
On C drive click no paging file

Then click ok and it will say that you will have to restart. After that if all works you will notice some extra free space on your hard drive that windows is installed on.
Virtual memory also known as paging file or swap file acts like an extension or your system ram and windows as well many apps are designed to conserve ram while putting less important data in virtual memory. Now why would that count you say it is simple. A slow hard drive will make virtual memory performance rather painful and will slow down loading of games.
m
0
l
January 2, 2012 4:58:52 PM

Done with that, now to test some Crysis and Skyrim.
Anyone else got any good games with lots of detail I can test with?
m
0
l
January 2, 2012 5:10:34 PM

Reporting back on the no paging file:
No increase in min. framerate, I'm thinking I have a bottleneck somewhere. I don't know where or how, but I don't know why else the GPUS wouldn't be throwing up 100% usage with less-than-adequate framerates. Unless there's some reason it doesn't do that.
m
0
l
a c 253 U Graphics card
a b C Monitor
January 2, 2012 5:40:58 PM

Try dropping down to 8gb of ram and just for the sake of asking are the two video cards exactly the same , Brand , model, core speed , everything exactly the same.
m
0
l
a c 253 U Graphics card
a b C Monitor
January 2, 2012 5:42:52 PM

What brand , model and age is the psu. Also what brand and model are the video cards.
m
0
l
a b U Graphics card
January 2, 2012 6:06:51 PM

If you have a side panel fan mount on your case, use it! Doesn't need to be any spectacular fan but quiet is always nice. If you can aim that more or less at your video cards you will drop the max temps considerably. If no side fan, maybe another front panel fan. Then tidy up your wiring and charge on...
Don't bother with Furmark, it will stress your cards far more than real games. It also has current limiters to keep cards from overheating.
m
0
l
a b U Graphics card
January 2, 2012 6:12:40 PM

KirkR said:
Frames increased by about 5-8 FPS, not exactly what I was looking for, but it's an improvement.

I have afterburner, I'll check that out.

That's what GTX 460s SLIed run Crysis like maxed out at 1080p your looking at around 40fps + -
m
0
l
a c 172 U Graphics card
a b C Monitor
January 2, 2012 7:06:12 PM

Well beyond this point there isn't much more that I can do to help but you never replied back about the timings of your ram as it is now with the overclock.
m
0
l
January 2, 2012 8:21:49 PM

Sorry, dozed off there.

@inzone,

The video cards would have been the same brand, but the one I had was discontinued and couldn't find it for less than $200. The 2 cards are: MSI GTX 460 Hawk Twin Frozr II; Gigabyte something-or-other (Here's a link: http://www.newegg.com/Product/Product.aspx?Item=N82E168...), looks like that one's discontinued as well. Well, when I purchased the Gigabyte card I made sure all the required specs were the same:
-1GB 256-bit GDDR5
-GTX 460

As for the Power Supply, I bought it about a month and a half ago with my new processor, Corsair GS800, Here's a link: http://www.newegg.com/Product/Product.aspx?Item=N82E168...


@DelroyMonjo,

I have a side panel fan, but I have it unplugged because it's positioned in a way that causes some turbulence with my CPU fan, which then gets REALLY loud. I still have an intake fan in the front, a rear exhaust, and a top exhaust. In fact, here's a link to my case: http://www.newegg.com/Product/Product.aspx?Item=N82E168...



@nforce4max,
Ram is still at stock speeds, which is 1333, only increased the multi's for the OC; from 17 to 20.5
m
0
l
a b U Graphics card
January 2, 2012 8:33:00 PM

GTX 460SLI do not scale well in Crysis they get around 40fps thats it thats all Radeon HD is the king for Crysis now in days.
m
0
l
January 2, 2012 8:49:15 PM

Headspin_69 said:
GTX 460SLI do not scale well in Crysis they get around 40fps thats it thats all Radeon HD is the king for Crysis now in days.


Ah, well, that makes me sad.
m
0
l
a b U Graphics card
January 2, 2012 9:00:07 PM

KirkR said:
Ah, well, that makes me sad.

So I am sure you play other games than just Crysis and the GTX 460 SLI scales at leased up to the same performance of a single GTX580 in quite a number of games so that's not to bad at all in fact that is a top end gaming setup you have. I highly considered GTX 460 SLI just a short while back when I could have got two msi GTX 460 Twin Frozer IIs for $154 a piece but by the time I was ready to drop the cash they were all sold out LOL.
m
0
l
January 2, 2012 9:01:49 PM

I feel you on the sold out, I REALLY wanted to buy a second one for SLI, just to be aesthetically pleasing, but they were sold out for months, and then it was discontinued. I was pretty aggravated.
m
0
l
January 19, 2012 9:51:27 PM

Same crysis here, I have 560ti Sli thrown into my 955, at 3.8ghz
Crysis Warhead freaks out on 16xQ anti aliasing, where as 4x is more stable, but its quite near the 40fps mark, at 16x anti aliasing around the same performance is observed with sli.
Skyrim still has the 40-60fps mark, but when I exit Dragonsreach its 25fps.
Lost Planet Colonies runs at 5fps, and Resident Evil 5 has a minimum of 21fps.
But resident evil 5 gives 60fps neat and clean (vsync on) over a single gpu, must be my processor bottlenecking.
m
0
l
January 19, 2012 10:14:12 PM

amd955be5670 said:
Same crysis here, I have 560ti Sli thrown into my 955, at 3.8ghz
Crysis Warhead freaks out on 16xQ anti aliasing, where as 4x is more stable, but its quite near the 40fps mark, at 16x anti aliasing around the same performance is observed with sli.
Skyrim still has the 40-60fps mark, but when I exit Dragonsreach its 25fps.
Lost Planet Colonies runs at 5fps, and Resident Evil 5 has a minimum of 21fps.
But resident evil 5 gives 60fps neat and clean (vsync on) over a single gpu, must be my processor bottlenecking.

That's terrible performance for Resident Evil 5 and Lost Planet 2 and Skyrim runs near the same on any rig so long as you are running anything in the vicinity of AMD x4 955 Oced and above it is a highly CPU dependent game.
m
0
l
!