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Quad SLI DX11 v Quadfire Mantle 4K maxed settings with res scaling.
BF4 is noticeably smoother on the Titans than the 290Xs.
The Titans are also very smooth at 5120x3200.
The 290X's only have enough vram for 150% resolution scaling (4k res) at 1440P ultra preset. 3.9gb vram usage. Any higher and you'll likely exceed the vram limit and get stuttering. Tested it myself recently.
3.9gb.
Mine only use 3.2gb at those settings.
5120x3200 uses 5.2gb using you know what cards.![]()
Maybe it is an X79 thing but VRAM usage seems constant however long I play regardless of using Mantle, DX11, AMD or NVidia.
Caspian Border for high VRAM use![]()
Good shout that lad. Same expansion pack as well innit?
Screenshots please. Include the UI info i have on mine. Try Operation Firestorm after 30 minutes of gameplay.![]()
Just played for 20mins in a 64man game and the memory usage was exactly the same at the end as it was when I started.
That was using my GTX 690s @1600p maxed.
We're talking about Mantle and 290X's. Not DX and AMD/Nvidia cards.![]()
The 290X's only have enough vram for 150% resolution scaling (4k res) at 1440P ultra preset. 3.9gb vram usage. Any higher and you'll likely exceed the vram limit and get stuttering. Tested it myself recently. This was using Mantle btw, vram usage may be lower in DX.
3.9gb.
Mine only use 3.2gb at those settings.![]()
Gosh and I though this was the BF4 thread.
Check you inbox matty boy I have just sent you the GPUZ stats of my 690s maxing BF4 @1600p. As you can see they have the same VRAM peaks and dips all the way through the run.
Still waiting on your Mantle 290X vram results. That's what we're talking about here Kaap. 690 DX results are meaningless as we're talking about Mantle specifically.
Just had a go with Mantle and DX11 on the 290s @4K settings
Mantle used 4.4gb of VRAM per card.
DX11 used 3.2gb of VRAM per card.
DX11 was very smooth and playable with good minimums and and very high average.
Mantle was all over the place with fps huge spikes on the CPU and the average or minimum fps was no where near as good as DX11.
I don't think multi GPU setups, 4K and Mantle are a good option as it uses way too much VRAM and that is what is causing the spikes on the CPU. At the moment DX11 seems to be the best option for extreme resolutions.
So i was right.
I have just enough vram at 1440P Ultra preset with 150% resolution scaling (4K). Its a smooth and playable experience. However its right on the limit so its possible after a map or two it would exceed that limit and begin to stutter. Possibly on a bigger map, like Caspian it would not be enough and would stutter from the outset. As you're at 1600P, your usage will be even higher. Its how i knew straight away when you said '3.2GB usage and stays there' that was not correct regarding Mantle.
I expect resolution scaling uses more vram than running 'proper' 4k as well, as it has to store the image whilst it downsamples it to the resolution of your monitor.