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nVidia Maxwell 980/970 Discussion with Tom Peterson
- Thread starter Gregster
- Start date
The memory compression, DSR, MFAA and Global Illumination impressed me and that is as far as I got before the Mrs dragged me out shopping
Will have a look at this when I get back later, timecode for DSR chat?
Roughly 11 minutes in before they talk about DSR.
Also, for anyone interested, 6:30 they talk about how Maxwell deals with memory compression.
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does that mean it will use less vram or is it something completely different?
I presume it means there will be less strain on the memory and its bus as a whole, less texture refreshing should mean less throughput required.
Dsr looks great, downsampling without monitor restrictions, almost makes me want a Maxwell card.
Dsr looks great, downsampling without monitor restrictions, almost makes me want a Maxwell card.
ah ok. So thats why they can get away with a lower memory bit rate then.
DSR is great. I am running 2 970s and game on a 1080p tv. With DSR on a few of the games I have tried (batman Ac and AO,tombraider,sleeping dogs and grid autosport) it kills more jaggies than MSAAx8 and I get 60fps on each of those games (apart from sleeping dogs) at 4k
Soldato
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Cheers Greg. Watching this now
Spot on Paul. It is all to do with colours and how they are perceived. Take these 2 shots for example:
Everything you see in the first picture is how we see the game and the second picture is colour compressed (all the pink). This leads to better use of the bus and the addition of 64 ROPS also helps as well as the unified 2MB of L2 cache.
In a basic slide, those all together give this kind of performance.
As you can see, that gives roughly 25% extra memory performance on average over those shown games and an effective 9.3Gbps bandwidth. Clever stuff although Tom explains it easier than I can
Yep that's the way I understand it, rather than going the 384-512bit bus route which is more complex and expensive they've dedicated some transistors to reducing how much traffic is being sent over the memory bus each frame by comparing frames and only sending what new information is needed.
It's improving efficiency rather than just brute forcing it.
It's improving efficiency rather than just brute forcing it.
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Soldato
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Exciting time for Nvidia users! If Nvidia's partners start producing G-sync IPS/PLS 1440p monitors then my GTX670 replacement could very well be a Geforce, if that comes to pass then I'll be pretty much locked in as an Nvidia user which (if I purchase the display) has me worried somewhat. It's shame (but not unexpected) that they won't support adaptive sync but given the benefits of having a closed ecosystem that's hard to leave is what it's all about these days otherwise I'm sure the items like Apple's iPhone would struggle to hold onto it's remaining market share.
I love the DSR feature as I could never get the downsampling to work with my TV manually. Hopefully AMD can implement a similar easy to use feature.
Tom certainly knows his stuff and has a very good way of explaining things, which certainly helps me out. I have only just finished my Peter and Jane books
A great watch Greg thanks for the heads up
It would be great if Tom decided to join the forum
A few AMD guys have so we need a green team Exec If you happen to read this though Tom we'd probably drive you bonkers with questions
Off topic (well Gregster mention it so I feel it's relevent
) so in spoilers.Gregster are you sure you've read all of the Peter and Jane books
Looking for a suitable gif I stumbled across these on Imgur
What I've learned from these volumes is that 'Mummy' is a right cow
What I've learned from these volumes is that 'Mummy' is a right cow
Soldato
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May have a quick gander through this later, cheers for the link.
Excellent video, cheers for that greg.
Very clear explanation to how the delta colour compression works. ( its about 6:00 mins in to the video if anyone hasn't seen it yet)
One thing to remember just before anyone wearing a red shirt chimes in rubbishing the tech, this is very VERY similar to what AMD are doing in the 285 Tonga GPU. both companies have been using compression in various way to minimise the data needed to be sent across the memory bus and this is the latest iteration of that type of work. It works very well on both Nvidia and AMD.
Very clear explanation to how the delta colour compression works. ( its about 6:00 mins in to the video if anyone hasn't seen it yet)
One thing to remember just before anyone wearing a red shirt chimes in rubbishing the tech, this is very VERY similar to what AMD are doing in the 285 Tonga GPU. both companies have been using compression in various way to minimise the data needed to be sent across the memory bus and this is the latest iteration of that type of work. It works very well on both Nvidia and AMD.
Agreed Bru and I wish more people would watch or at least read up on DCC to clear up the reason why nVidia is using a 256bit bus. Clearly it is coping well with high resolutions when you look at some of the bench results.
Very early drivers as well for the new Architecture and I fully expect some decent gains with maturer drivers. DSR is a great addition and I am a little jelly on not being able to do that and also G-Sync running with ULMB = "No comment" from Tom.... Not giving much away there.
Also he did say that they are not interested in Adaptive Sync and to expect bigger things from G-Sync, so disappointing that no A-Sync but good that they are working on G-Sync even further.
Very early drivers as well for the new Architecture and I fully expect some decent gains with maturer drivers. DSR is a great addition and I am a little jelly on not being able to do that and also G-Sync running with ULMB = "No comment" from Tom.... Not giving much away there.
Also he did say that they are not interested in Adaptive Sync and to expect bigger things from G-Sync, so disappointing that no A-Sync but good that they are working on G-Sync even further.