Surely he allowed to have his own personal forum account so he can post what he wants outside of his AMD working hours....LtMatt needs a ghost acc
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NVIDIA GeForce GTX 980 SLI 4K Video Card Review
- Thread starter tommybhoy
- Start date
Not convinced XDMA is making the difference and more that the 290X are better equipped to handle the resolution bus and bandwidth wise in general.
Unfortunately with their testing methods and the mix of variables to play with leaving too many unanswered questions i.e. the 780tis potentially being VRAM limited in some situations, etc. (so you can't see if the extra VRAM bandwidth helps to even things up) its hard to take anything away from that review of any substance.
Unfortunately with their testing methods and the mix of variables to play with leaving too many unanswered questions i.e. the 780tis potentially being VRAM limited in some situations, etc. (so you can't see if the extra VRAM bandwidth helps to even things up) its hard to take anything away from that review of any substance.
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Soldato
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They usually say if a card is vram limited. I have not read the whole review so don't know if it's true with this article but in all the others i have read they do. Have Nvidia gimped the 780ti as it seems to have went backwards comparing to the 290x. Either way the 290x in cf is still the best experience out of those setups.
HardOcp were one of Amd's biggest critics as far as Cf smoothness went. Amd seem to have done a brilliant job of turning that around to now be better or at least as good as NV in this department.
I couldn't see any mention of it or any kind of testing to see what the effective if would be from a quick skim and from having a 780 and a 4K panel I can tell you in many of those situations they are testing VRAM does become an issue especially when you whack the MSAA up.
I'm not slating crossfire here or even saying XDMA doesn't have some significant advantages and/or that SLI does/doesn't have problems I just don't think they've done enough testing to make any kind of claims like that without fully eliminating other potential factors.
I'm not slating crossfire here or even saying XDMA doesn't have some significant advantages and/or that SLI does/doesn't have problems I just don't think they've done enough testing to make any kind of claims like that without fully eliminating other potential factors.
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Soldato
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Tbh they have tested the 290x and 780ti in crossfire/sli for the last year so they probably know where the vram cut off is for each config. The review was more about how 980sli does against these setups.
They had an sli scaling article up a while ago, 3 and 4 way I think. Can't remember the specifics.
There were scaling problems in some PCP games too.
http://hardocp.com/article/2014/09/...rce_gtx_980_video_card_review/14#.VE7vYvmsXlE
Bottom line, the parity it had in single mode is gone-there is an SLi problem somewhere.
It might be driver related, could be hardware or combination, time will tell whatever the problem is.
http://hardocp.com/article/2014/09/...rce_gtx_980_video_card_review/14#.VE7vYvmsXlE
Bottom line, the parity it had in single mode is gone-there is an SLi problem somewhere.
It might be driver related, could be hardware or combination, time will tell whatever the problem is.
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Surely he allowed to have his own personal forum account so he can post what he wants outside of his AMD working hours....
He might be a allowed a personal account But That account he used has Vender status which means when he's using it its seen to be representing that vendor and has to abide by OCuk's vendor rep rules it seems.
I for one have no issue if he has a separate account to post with but i dont know how that goes with the rules either, i do miss his input into threads as a interested person not a rep
Personally I think its just a mixture of the VRAM amount on the 780ti and a few things cut back a bit on the 980s that hold them back at 4K whereas the 290X with its extra VRAM over the 780ti and a bit of brute force in some areas that the 980 lacks helps it to perform well at 4K.
Not saying there isn't something to XDMA, etc. but they certainly haven't provided enough in the article to backup claims to those ends or that there is a wider potential issues with SLI.
Would the Titans fare any better?
Not surprised at all, people will just have to remortgage their house when the 980ti is released, im guessing it will have 6GB ram?
I bet the new AMD cards will be good value for money, and even more ram!
Titans scale slightly better than the 290Xs @4K as there is nothing wrong with SLI, 3 and 4 way often gives near to 100% scaling.
The performance drop off with the 980s is purely down to the 256bit bus and the more cards you add the worse it gets.
My prediction when the Maxwell Titans arrive is they will absolutely fly @4K and scaling will be fantastic, yet they will still be using the same drivers as the 980s.
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I really hope this is a driver issue only and it will get smoothed out.
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I've been telling people from day one it's just a scaling issue with the new cards, give it a while to get sorted out.
There is nothing wrong with the scaling in fact it is very good at low resolutions.
The performance profile of the GTX 980 is very similar to the GTX 680 as the resolutions increase.
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Dude running DSR at 4k on my cards completely and utter kills SLI in some games.
Drop DSR down a factor and scaling is fine again.
Soldato
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980sli is 6-9FPS quicker than 290x CF in BF4, but the 290X's are run in DX11 mode, in mantle I get around 15fps more than in DX11, silly benchmark.
The results say to me that for CF290 users SLI980 is a pointless 5% upgrade.
The results say to me that for CF290 users SLI980 is a pointless 5% upgrade.
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My whole point the drivers and scaling do work, what messes things up is the increased workload with DSR or actually raising the resolution.