3 Replies Latest reply on Jul 24, 2016 2:19 PM by speeder

    Sapphire 380X stutter-prone


      First times I asked this, I had suspicious PSU, but now I have new PSU, thus I can ask it again.




      ASRock Z97 Extreme4

      i5 4690K

      32GB DDR3 2400

      3 WD Black 1TB

      PSU Corsair RM1000x


      open air test bench, here is winter (room temperature is usually around 15C or less)


      Windows 7 64Bit

      drivers tested: 16.3.something, 16.4.something, 16.6.1, 16.6.2


      GPU: Sapphire Nitro 380X 4GB




      The problem: The GPU stutters quite a bit, in some games it is more obvious than in others, although I don't own Just Cause 3, this video shows the issue I am seeing perfectly: Just Cause 3 PC: GTX 960 vs R9 380, Core i5 4690K vs FX-8350 Performance Testing - YouTube


      Other tests: GTAV in some versions (16.4.something) is almost unplayable, sometimes having fits of heavy stuttering, on 16.6.1 it "mostly" works, sometimes it still stutter, but it is rarer.

      Many demoscene demos, and older games behave weirdly (for example getting capped at some low FPS, usually around 40fps, no matter the game or demo)

      CAD programs the mouse stutter, zooming, rotating, etc... also cause stuttering.

      Unigine Heaven has obvious stuttering nearer the end, with average framerate high, maximum framerate also high, but visible pauses on the video mid-scene (ie: not on scene transitions), usually when nothing special is happening (ie: no new effect or geometry). mininum FPS on unigine heaven is 5 fps.


      OCCT, the GPU stays for about 50 seconds stable, then the FPS start to slowly drop. I couldn't figure a way to track frametimes, and the scene is mostly (or completely, depending on the settings) static, so I can't see stuttering.




      stuff I tried so far:

      disabling ULPS, raising power limit to +20% (it helped a lot in some games), changing drivers (some games get better, others get worse, most noticeable so far on GTAV, that the performance varies wildly depending on driver version), DDU, replugging GPU, replugging power cables, overclocking CPU, underclocking CPU, over/underclocking RAM, undervolting GPU (performance improves, stuttering diminishes, but it crashes more often... on default settings it also crashes, but less than undervolted), overvolting GPU (performance drops A LOT, stuttering skyrockets), enabling/disabling vsync (usually make no difference), enabling "performance" in the driver (right clicking the driver icon).

        • Re: Sapphire 380X stutter-prone

          Some update:


          It also stutters ocasionally on 2D games too, for example in some twin-stick shooters the graphical updates get temporarily stuck (for about half of a second), while the rest of the action keep going (thus frequently resulting in my character being killed, since I can't dodge bullets I can't see).


          The pause length, and timing between them, are the same as in Unigine Heaven

            • Re: Sapphire 380X stutter-prone

              This got rid of my stuttering....might work for others.

              Uninstall previous drivers by going into Control Panel and right-click AMD Install Manager and select uninstall

              Uninstall everything and reboot PC. Restart again but boot into Safe Mode and run the Display Driver Uninstaller program

              to remove all the remaining ATI/AMD stuff and let it restart the PC.

              Restart again into safe mode and then run the AMD Cleanup Utility (it found stuff still on my system) and reboot.

              Now install your new drivers.


              Hope it helps.


              Gigabyte 990FXA-UD5 R5

              Cooler Master HAF912

              AMD FX8350 @4.3Ghz

              Sapphire R9 390 Nitro 8Gb

              16Gb DDR3 Kingston Hyper-X Fury @1866Mhz

              Corsair TX750W 80+ PSU

              Samsung 840 EVO 250Gb SSD

              1Tb WD Blue

              Windows 7 Ultimate 64bit