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560ti sli vs ati 6990 ?

garyfl

garyfl

garyfl

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Joined
26 Jun 2010
Posts
2,118
Location
west yorkshire.
love my new 560 ti sli, but im noticing a lot of microstutter and tweaking problems with this sli malarke, also, with having 2 cards it creates a heat issue, im pedantic and would in an ideal world like my cards to run below 75.c but thats not the case they reach early 90s sometimes, only the top one, bottom one reaches a max of 76, top one is kind of blocked by my sound card.

basically ive thought about going the whole hog and trying atis meatiest card, but one of my questions is, with it essentially being a dual card, does that suffer microstutter like sli would ? also, is it justified going from 560 sli to ati 6990 ? is there performance difference worth it ? also bear in mind im thinking of going 2560 by 1600 res.
 
ungine heaven benchmark which isnt a prblem as its a benchmark, but i get it sometimes get it in metro 2033 and sometimes gta 4
 
Never really noticed any microstutter issues with my 470 SLI setup and I'm pretty sensitive to that kinda stuff - if your using VSync with SLI tho you might be mistaking this for microstutter as SLI and VSync don't have the greatest relationship for input latency - making quite a few games feel "stop/start" choppy under certain conditions - and heaven is stuttery even on single cards (it does also have higher levels of microstutter than typically found in games when using multi GPU).
 
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I don't feel microstuttering in Unigine Heaven Benchmark. Metro 2033 is too hardware-demanding that not even GTX580 x 2 SLI can maintain constant 30+ fps throughout the gameplay at max settings. GTA4 PC version is a known console port poorly optimized and there is currently NO hardware immune to lag spikes.
 
it just feels sometimes as though sli isnt working, for eg i get 32fps in heaven 2.5 with sli but with crysis 2 i get 67fps in games like gta 4 it dosnet eve support sli so i get 24fps with that icenhancer mod, just wondering if a 6990 would give out more juice as well as act like a single card ie, utilize all its power in gta 4, or not have trouble in games that find it hard to utilize sli or xfire. also a single card in my 16x slot would probably better as less heat and power.
 
garyfl said:
it just feels sometimes as though sli isnt working, for eg i get 32fps in heaven 2.5 with sli but with crysis 2 i get 67fps in games like gta 4 it dosnet eve support sli so i get 24fps with that icenhancer mod, just wondering if a 6990 would give out more juice as well as act like a single card ie, utilize all its power in gta 4, or not have trouble in games that find it hard to utilize sli or xfire. also a single card in my 16x slot would probably better as less heat and power.
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Crysis 2 isn't that difficult a game to run, if you are using SLI and got those frames on Crysis that would kinda suck. Bear in mind Heaven is designed to stress the GPU loads.
 
garyfl said:
it just feels sometimes as though sli isnt working, for eg i get 32fps in heaven 2.5 with sli but with crysis 2 i get 67fps in games like gta 4 it dosnet eve support sli so i get 24fps with that icenhancer mod, just wondering if a 6990 would give out more juice as well as act like a single card ie, utilize all its power in gta 4, or not have trouble in games that find it hard to utilize sli or xfire. also a single card in my 16x slot would probably better as less heat and power.
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Like I said, a 6990 is 2 GPU's using Crossfire.

If a game doesn't support Crossfire, or scales badly, you get the same issues.

It's the same for the GTX 590 and SLI.
 
garyfl said:
with dx 11 ultra at 1080 it tells me my gpu usage is around 97% on both, I get about 62 average
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And?

Average fps has nothing to do with micro-stutter.

The average may be 62fps but if you can see micro-stutter it means that the frame rate is dipping to a very low level for a short period of time before picking up again.
 
Surveyor said:
And?

Average fps has nothing to do with micro-stutter.

The average may be 62fps but if you can see micro-stutter it means that the frame rate is dipping to a very low level for a short period of time before picking up again.
Click to expand...

my op past had 3 questions, one i didnt really bring to light as much, the one i didnt really bring to light was how i dont think im getting the fps i should in things as i dont think sli is working properly. comparing my sli 560 ti 2gb to others 1gb sli they seem to stamp all over mine and i dont know why. i dont want to go for the single fastest as itl be a step down from my sli in performance.
 
billysielu said:
OP - don't sink money on this, grass is always greener.
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you saying dont go red ? :P i dont mind really ive heard good things about both sides, though funnily enough ive never owned ati, therefore im not entitled to an opinion yet. The 6990 looks like a beast, i always want the biggest and bestest thats my downfall, but as its been confirmed in this thread, ill still get the same problems, just more fps.
 
garyfl said:
my op past had 3 questions, one i didnt really bring to light as much, the one i didnt really bring to light was how i dont think im getting the fps i should in things as i dont think sli is working properly. comparing my sli 560 ti 2gb to others 1gb sli they seem to stamp all over mine and i dont know why. i dont want to go for the single fastest as itl be a step down from my sli in performance.
Click to expand...

Benchmark with one card and then with both in SLI.

You'll soon find out if SLI is working properly.
 
in crysis 2 i get about 35 fps and with the extra card in sli about 62 so then i guess its working properly, but my results still seem to be insuperior to others similar cards in sli, im not bottlenecked either my i7950 is at 3.8ghz
 
Surveyor said:
And?

Average fps has nothing to do with micro-stutter.

The average may be 62fps but if you can see micro-stutter it means that the frame rate is dipping to a very low level for a short period of time before picking up again.
Click to expand...

I thought if the instantaneous fps is greater than or equal to the refresh rate of the monitor, say, 60Hz, then all microstuttering is completely eliminated.

According to OP's previous posts, I have a feeling that something is wrong with his mobo or other hardware (perhaps SLI bridge bad contact ect).
 
Depends on the uniformity of the fps, if your rendering 70fps and display is running 60Hz but your rendering say 5 frames with small gaps, then a big gap and then 20 frames very quickly, another big gap and then another 20 frames very quickly, etc. then its going to feel quite bad even with vsync on and outputting a lot of fps.
 
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