My DSR Review

Discussion in 'Videocards - NVIDIA GeForce' started by whitespider, Oct 11, 2014.

  1. BetA

    BetA Ancient Guru

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    umm, 4:3 works, also does 5:4...

    But, i (on my Flat CRT 4:3) monitor, cant use 16:9 reso´s with DSR enabled..only 4:3, wich totaly defeats the Purpose i was looking for.. GedoSato at least will let me choose the native res it will use, wich is 1600x900, here..since, without DSR, i can set 1600x900 as my res, wich results in an clean sharp and nice 16:9 image..And i dont mind the black bars i have when i use 16:9 reso´s on my monitor, im prob. about 1 meter (more or less) away from the monitor..its for gaming only..in fact, the image looks better then on an LCD monitor, haha

    so, for now, GedoSato is better for me..

    oh, well...
     
  2. eclap

    eclap Banned

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    not a must have feature for me. I've tried it in some games, worked ok, but it wasn't as clear as 1440p, also, some scaling issues with certain games, be it UI scaling, font scaling etc... It's a nice touch, and I'll use it in some games to mess with things, but 99% of the time I'll stick to 1440p with forced AA via Inspector/RP in the future.
     
  3. slickric21

    slickric21 Ancient Guru

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  4. whitespider

    whitespider Member Guru

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    I much prefer the written quality of techreports review over mine by a WIDE margin, and their objective review covers most bases. One thing they don't cover is the cost of the filter in an absolute sense.

    Their benchmarks show a minimal performance difference between 3840x2160 using their 13tap filter, and natively. However that's because we are already using so much video power (gtx 980's) that the few fps hit might be misleading.

    Let's translate that to a gtx 670 running a 2560x1440 DSR downscale from 1920x1080, playing ziggurat (unity engine rougelike), that's 25% the power of 980 sli. So we are speaking a different performance language.

    2560x1440 DSR = 49fps
    2560x1440 Native = 87fps
    1920zx1080 native = 145fps.

    Which brings me to my point, the mere activation of the filter, is a huge cost to and mid range hardware. On sli 980's running maximum settings on a high end game native vs dsr seems minimal. But minimal on something 200% more powerful, is incredibly demanding on lesser hardware.

    Most of you probably did the internal calculation when reading the article in your head "so 5% fps on sli 980's is 25% fps on a gtx 770"

    But it's worth mentioning for people that are less performance/scale aware.
     
    Last edited: Oct 12, 2014

  5. slickric21

    slickric21 Ancient Guru

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    Hmmmm i dont see that tbh.

    Unless im missing something here the native test had 8,294,400 pixels and the DSR res had 9,216,000 pixels, thats 11.1% more pixels.

    So based on...
    Native 3840x2160 = 77fps
    DSR 3840x2400= 73fps

    11% more pixels, only 5% slower.

    I make DSR cheaper by that logic.

    What am i missing here ?
     
  6. deadpool790

    deadpool790 New Member

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    fixed via Using DVI cable over HDMI which is currently and not full capable plugging it in unless i cut the port separators on the tower.
     
    Last edited: Oct 12, 2014
  7. HeavyHemi

    HeavyHemi Ancient Guru

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    I'm not sure why you're posting that here. The obvious to question is does it occur at stock clocks. That looks to me like you have the memory clocked to high.
     
    Last edited: Oct 12, 2014
  8. Agent-A01

    Agent-A01 Ancient Guru

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    Resize that or put it in spoiler dude, nobody wants to scroll through a 4k image..
     
  9. MonarchX

    MonarchX Banned

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    Bah... lame! I thought DSR would actually improve performance, at least after driver updates. Driver updates is something to consider. Why release technology that does the same as regular downsampling but at extra cost? Seems stupid or just too raw to be implemented and used.
     
  10. whitespider

    whitespider Member Guru

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    I would like them to make the filter less demanding to be honest, it seems like about 30% of wasted gpu cycles the moment you activate any kind of DSR on mid range hardware. I'm not saying they should eliminate the 13tap Gaussian filter, but they should give us an option if we want regular bilinear downscaling or if we want to use the filter, and they should also optimize the filter a little more.
     

  11. slickric21

    slickric21 Ancient Guru

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    I'm going to do some tests of my own to see what DSR performance hit has vs regular downsampling.

    The few reviews ive read say it has a penalty of around 1-2% extra (probably because fo the filter)
     
    Last edited: Oct 12, 2014
  12. slickric21

    slickric21 Ancient Guru

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    Okay did a few benchmarks (ave fps, ave of 3 runs) in Tombraider today and found out the following.


    Traditional downsampling 2103x1183 = 116fps
    DSR 1.2x 2103x1183 = 112fps
    = 3.5% perf hit due to the DSR filter.

    Traditional downsampling 2351x1323 = 96fps
    DSR 1.5x 2351x1323 = 93fps
    = 3.2% perf hit due to DSR filter


    Traditional downsampling 2560x1440 = 82.5fps
    DSR 1.78x 2560x1440 = 81fps
    = 2% perf hit due to DSR filter

    Didn't bother doing anymore resolutions as i've seen enough, the perf hit is minimal, and being much easier to set up for me im sticking with DSR from now on !!!:infinity:
     
  13. 007.SirBond

    007.SirBond Master Guru

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    Does anyone know where is the best settings for 4k DSR with the smoothness slider?
     
  14. whitespider

    whitespider Member Guru

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    Depends on the game and personal taste. There is no "objective best" since some people prefer sharp textures and lots of shimmering/detail, and others prefer the smoothness.

    Personally, I prefer a smooth image, but not to the point where it sacrifices the user interface being unreadable. So real time strategy games should never go above about 40%, whereas something like skyrim looks good even at 80% (a little hazy, but it makes the world feel more 'whole' somehow).

    33% is a reasonable default, and you could be quite happy staying there. If you want a game that is very dense to look extra special however, raise it a little until you find the level of smoothing that makes you feel most immersed.
     
  15. whitespider

    whitespider Member Guru

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    Borderlands Pre Sequel:

    Gedosato 2804x1577 = ~80fps
    DSR 1.2x 2804x1577 = ~38fps
    = more than 100% perf hit due to the DSR filter.

    Gedosato 3620x2036 = ~45fps
    DSR 2.0x 3620x2036 = ~30fps
    = Approx 75% perf hit due to DSR filter

    And this one is very interesting

    Gedosato 2.25x 3840x2160 = ~35fps
    DSR 1.2x 2804x1577 = ~38fps
    Gedosato is roughly the same at 4k, as dsr is at 2k.

    See the filter alone costs kelper a ton of performance. I look forward to eventually getting sli 970's. :)

    My 670 just aint cutting DSR. And for the record I good above average performance in other games. It's just DSR.

    Sparse Grid Supersampling at 2x 2x costs a hell of a lot less, and looks a hell of a lot better, for now. In dx9 games at least.
     
    Last edited: Oct 23, 2014

  16. pimp_gimp

    pimp_gimp Ancient Guru

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    DSR is working on my monitor and it's 16:10.
     
  17. slickric21

    slickric21 Ancient Guru

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    Test DSR vs driver downsampling and see if its the same ???

    Noone else see's the hit you do ??????
     
  18. spider

    spider Master Guru

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    Of course DSR is removing aliasing by oversampling.
     
  19. Tnecniv

    Tnecniv Member

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    Your post encouraged me to do some testing of my own. Long story short, I saw the same minimal fps hit.

    I tested with Thief. 2880x1800 downsampled to 1920x1200, in-game SSAA disabled, everything else maxed out. Here's what I got:

    Driver/traditional downsampling 2880x1800 = 105.5fps:
    [​IMG]
    https://farm4.staticflickr.com/3936/15605599601_c30c90d0c1_o.jpg

    DSR 2.25x default smoothness 2880x1800 = 103fps:
    [​IMG]
    https://farm4.staticflickr.com/3939/15609100182_8d1e32b808_o.jpg

    When I get a chance, I'll test a dx9 game with driver, dsr, and gedosato next.
     
  20. slickric21

    slickric21 Ancient Guru

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    Nice post and thanks for sharing the results.

    We've got a lot of misinformation spreading about DSR so nice to see some actual results.

    Will be intersting to see the results your GeDoSaTo tests.

    I cant do any myself as I cant even rememner the last DX9 game I played...
     

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