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Do third gpu stop stuttering?

380 views 13 replies 6 participants last post by  bonami2 
#1 ·
Hi guy im currently using 2 7950 in crossfire and i heard that maybe having a third one would stop the stuttering

( usage drop when moving fast ) 60fps and bam drop to 35

Im aint cpu bound.

Some game do it other dont.

Arma 3 run perfectly

Crysis 3 multiplayer stutter like mad

Beam ng and Gta v stutter just a bit enough to be annoying.

Etc
 
#2 ·
I'm not sure about a 3rd card reducing your stuttering. When you get the stuttering what does gpu-z show the problem as? Is it maxed core or memory? I would save up your money and buy that sweet system a legit GPU. Get a 980Ti or, if your stuck on AMD, a Fury X or whatever new cards get released by the time you've saved up some cash.
 
#3 ·
Quote:
Originally Posted by kl6mk6 View Post

I'm not sure about a 3rd card reducing your stuttering. When you get the stuttering what does gpu-z show the problem as? Is it maxed core or memory? I would save up your money and buy that sweet system a legit GPU. Get a 980Ti or, if your stuck on AMD, a Fury X or whatever new cards get released by the time you've saved up some cash.
Gpu usage is like 70% vsync at 60fps

I turn my car example at high speed bam gpu usage drop and fps drop. Like maybe the gpu cant load the texture fast enough or same as a cpu bound scenario would feel like when everything blow up.

vram at less than 2300mb with about 500mb for window. about 1300mb vram for beam ng

Arma 3 use 2300-2400 and run like perfectly

I expect to upgrade to a 980ti equivalent or better in a years and put those 7950 in the rigs im building if everything go well
smile.gif


Thank you
 
#4 ·
I think the 3rd card would only make the stuttering worse.
frown.gif
 
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#5 ·
There have been legitimate cases of tri-fire showing improved frame times over dual card setups, but this was before the frame pacing fixes and it probably isn't applicable now. It also won't help if there is another underlying cause.
Quote:
Originally Posted by bonami2 View Post

Gpu usage is like 70% vsync at 60fps

I turn my car example at high speed bam gpu usage drop and fps drop. Like maybe the gpu cant load the texture fast enough or same as a cpu bound scenario would feel like when everything blow up.
Is this GTA V? What settings?

The crossfire bridge is used for transferring frame compositing data and past a certain point (resolution, frame rate, and possibly compressibility of the frames) it's bandwidth becomes insufficient.

GTA V also streams in assets fairly constantly, and any bottleneck here can be exacerbated by CFX.

Of course, the game doesn't really like CFX much in general...
 
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#6 ·
Quote:
Originally Posted by skkane View Post

I think the 3rd card would only make the stuttering worse.
frown.gif
disable ulps
turn on high performance mode in CCC notification tab
try the game with frame pacing on & off in ccc.

there are ways to fix stuttering & some games need different stuff.

i generally get it when loading to a new level in some mp games.

i just hit high performance mode in the ccc notification tab & it goes away.

i always have ulps off by registry & framepacing off.
 
#7 ·
Quote:
Originally Posted by Blameless View Post

There have been legitimate cases of tri-fire showing improved frame times over dual card setups, but this was before the frame pacing fixes and it probably isn't applicable now. It also won't help if there is another underlying cause.
Is this GTA V? What settings?

The crossfire bridge is used for transferring frame compositing data and past a certain point (resolution, frame rate, and possibly compressibility of the frames) it's bandwidth becomes insufficient.

GTA V also streams in assets fairly constantly, and any bottleneck here can be exacerbated by CFX.

Of course, the game doesn't really like CFX much in general...
Gta v on mostly high setting with almost 100% scaling from 1 to 2 gpu at 5760x1080 Going in straight line go perfectly even at 100mph but turning fast cause drop in most game i can run in straight line but if i move it stutter

Maybe it the Bandwith it do make sense in someways but Sli Titan x dont have that problem and use a bridge i think?
 
#8 ·
Quote:
Originally Posted by korruptedkaos View Post

disable ulps
turn on high performance mode in CCC notification tab
try the game with frame pacing on & off in ccc.

there are ways to fix stuttering & some games need different stuff.

i generally get it when loading to a new level in some mp games.

i just hit high performance mode in the ccc notification tab & it goes away.

i always have ulps off by registry & framepacing off.
Il try that

Btw i never touched cc except to enable crossfire and unknow game support think just under it and it worked fine for 90% of my game ( i go windowed if it wont work )

Even skyrim run super well in crossfire ahah
 
#9 ·
Quote:
Originally Posted by bonami2 View Post

Il try that

Btw i never touched cc except to enable crossfire and unknow game support think just under it and it worked fine for 90% of my game ( i go windowed if it wont work )

Even skyrim run super well in crossfire ahah
no need to go windowed. just window key & on your notification tab put CCC.... right click>1: 7950>3d settings>standard settings> high performance

hit your game icon & your back to full screen.

most of my games run fine to. every now & then it happens & usually this fixes it for me
 
#10 ·
Quote:
Originally Posted by bonami2 View Post

Maybe it the Bandwith it do make sense in someways but Sli Titan x dont have that problem and use a bridge i think?
SLI isn't the same thing.

Pre-XDMA CFX only efficiently transfers frames for compositing over the CFX bridge interconnect.

SLI is more flexible. Indeed, there are SLI setups that work without the bridge at all.

That 5760*1080 resolution may be starting to push the limits of bridged CFX. CFBI bandwidth is only ~900MiB/s and a frame of the resolution you are using is pushing ~24MiB in size. With each card rendering every other frame, things are going to start to break down at about 80 total frames per second, unless the frames are very compressible.

Some more info on the difference between CFBI and XDMA: http://www.anandtech.com/show/7457/the-radeon-r9-290x-review/4
Quote:
Originally Posted by bonami2 View Post

Il try that

Btw i never touched cc except to enable crossfire and unknow game support think just under it and it worked fine for 90% of my game ( i go windowed if it wont work )

Even skyrim run super well in crossfire ahah
Different games need different options.

Playing with frame pacing on vs. off may help, as korruptedkaos mentions.

Using performance driver settings will almost certainly reduce the effective size of the frames as well, and may help your situation.
 
#12 ·
Quote:
Originally Posted by PontiacGTX View Post

You probably running out of vram plus pacing drivers for GCN1.0 are worse than GCN1.1 using xDMA
Well that what i though with gtav it did stutter worse when going over vram and even crash.

But beam ng is like at 1.2gb vram and do the same thing

Tried high performance mode thing it seem to change nothing.

And how do i disabled frame pacing? Im a noob about crossfire setting since it work pretty well all at default
 
#13 ·
Quote:
Originally Posted by bonami2 View Post

Well that what i though with gtav it did stutter worse when going over vram and even crash.

But beam ng is like at 1.2gb vram and do the same thing

Tried high performance mode thing it seem to change nothing.

And how do i disabled frame pacing? Im a noob about crossfire setting since it work pretty well all at default
on gaming 3d application setting

Really a r9 290/x/390 will have a better experience or just a single card like a Fury Or GTX 980Ti
 
#14 ·
Quote:
Originally Posted by PontiacGTX View Post

on gaming 3d application setting

Really a r9 290/x/390 will have a better experience or just a single card like a Fury Or GTX 980Ti
Yea well my plan was to get the gpu for testing purpose and sell it after if it did not work. But i decided to wait and put it into my new build for folding@home when i upgrade gpu.

Will look for next gen gpu
smile.gif


Thank you everyone
 
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