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Hardspell 4870X2 Futuremarked.....
- Thread starter ten80p
- Start date
Associate
- Joined
- 28 Apr 2007
- Posts
- 494
Afaik microstutter is caused by the frames being outputted from each card/gpu not being outputted at a steady rate.
For example:
-GPU 0 outputs a frame
-3ms later GPU 1 outputs a frame
-10ms after that GPU 0 outputs a frame
-3ms later GPU 1 outputs a frame
etc. etc.
Instead of one gpu outputting a frame at a regular interval.
Some people claim to see it and notice it whereas others don't, personally I've never used a dual GPU setup so I can't comment. However it is odd that SLI/Xfire have been around for a few years and it's only really since the 3870X2 that i've seen people complaining about it, which makes me wonder if people are actually able to see it or not.
For example:
-GPU 0 outputs a frame
-3ms later GPU 1 outputs a frame
-10ms after that GPU 0 outputs a frame
-3ms later GPU 1 outputs a frame
etc. etc.
Instead of one gpu outputting a frame at a regular interval.
Some people claim to see it and notice it whereas others don't, personally I've never used a dual GPU setup so I can't comment. However it is odd that SLI/Xfire have been around for a few years and it's only really since the 3870X2 that i've seen people complaining about it, which makes me wonder if people are actually able to see it or not.
Soldato
- Joined
- 10 Nov 2006
- Posts
- 8,578
- Location
- Lincolnshire
Looks a very good card indeed, but its still either slower or the same speed as 2X 4870's CF in all tests other than Vantage.
I thought it was going to be 15% quicker? Which tool made that up off the top of his head?
I thought it was going to be 15% quicker? Which tool made that up off the top of his head?
I know that when i had a 3870x2 it used to suffer from powerplay issues.
The GPU(s) would go into 2d mode in game if you were standing still or something to that effect, and then jump back up when you moved on causing massive lag like gameplay
I guess this may have been fixed by now ?
While what you detail may be correct, I've read (from ATI) that it's based on cutting the workload simply so each GPU renders a frame (so rendering up to 4 frames ahead). If the frame isn't ready to output at the predetermined time it can either be skipped or they can delay outputting the frame so that the calculations on the frame can be finished. ATI's tact (or was back around det 8.3) is to simply skip frames that aren't ready, so you can quickly go from a solid 60fps to a stuttery mess. Where you're near/marginally exceeding the limit of what the cards can render before it has to be skipped you get a strange fluctuation in framerate, much as you describe.
The last driver set stopped microstutter for me.
8.6 Stopped the micro stutering for me too, I can assure you, if you experience it, especially in something fast moving, like COD4 or DODs then it becomes a real problem and often is the difference between winning and losing.
I don't ever want a card that behaves like that again, making me think twice with dual GPU cards...I had originally thought that ATI would have sorted it once and for all, but the review did mention it.
Yup, one of the main offenders was crysis in certain levels. Was fixed months back.
Associate
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- 9 Mar 2008
- Posts
- 1,585
- Location
- Glasgow
It was claimed in a few articles that the card could perform up to 15% better than a 4870CF config in some games. It was never claimed to be 15% faster all of the time, people just read that figure and started touting it all over the net.
Martyn
Associate
- Joined
- 20 Oct 2007
- Posts
- 95
I want this card but i just have an Asus P5k board and i am not planing to upgrade it in 6 months or so.
What should i do?
What should i do?
Nope, people have been commenting on this issue for a long time, since before the 7950GX2 in fact but the only difference is we now have a name for the issue, people used to mistakenly refer to it as crossfire/sli mouse lag or something similar.