Originally Posted by nyboy42
after 2 days with the Sapphire r9 290, im getting inconsistent core clock and gpu usage performance. For example, Unigine Heaven Benchmark performs beautifully, my gpu usage stays 100% solid and my core clock is locked to max thru the entire benchmark. Then ill fire up Crysis 3 and the core clock is constantly fluctuating between 500mhz- 947mhz getting terrible frame rates. Then I fired up Assassins Creed 4 and it works beautifully, core clock locked at 947. Then i launch Metro Last Light and its TERRIBLE gpu usage dipping down to 30%, core clock going as low as 300 mhz BUT ill run the Metro Last Light Benchmark in MAX settings and it works perfect, i average over 60 fps, core clock stays solid, so this not making any sense to me. I have a custom fan profile and the temps NEVER go above 80C. Besides AMD has stated that at 95C you should be getting full boost clock performance with no throttling, my card comes nowhere near 95C and certain games give terrible performance.
At this point I cant tell if its a faulty card, bad GPU drivers, or certain games need patches - wondering if anyone else with a Sapphire r9 290 and some of these games can comment whether they have the same experience.
I can't comment on the games you mentioned.
I can, however, say I've seen similar behavior in Skyrim (I just play that a lot atm... I thought ultra settings with my old HD7870 looked awesome - who could've guessed there could be such a difference between ultra and uktra...)
I play with the Afterburner OSD on, and I've seen instances of the clockspeed dropping down to half of wat it was - but that's on load screens, so not that inexplicable.
No, the thing that strikes me as odd is how my GPU ussage can drop to 0% for multiple - really, multiple multiple - seconds yet the game is silky smooth. Has anyone noticed any visual effects from bouncing clocks?
Another weird thing I've noticed is in the AB graphs. the GPU usage graph is usually pretty low, tight about up until th epoint ingame that I open the menu and exit. That seems to cause a bit of a spike in GPU usage...
Odd, I would have thought flying around Skyrim and having dragons breathe fire down my neck would be more graphically taxing than a menu.
Another thing to note is I never reach full clocks in game. In Valley I do reach the full 1000MHz I've got my Sapphire 290 at, but maybe because Skyrim is an older, less taxing DX 9 / 10 game, Powerune decides it doesn't need full clocks.
I don't know, really, but so far, in Skyrim at least, I've suffered no ill effects from the bouncing clocks (btw: in game ussually between 700ih and 847 (yes 847, not 947). And I can rule out throttling: in Skyrim the core maxes around 65 C and in Valley Extreme HD just about high 80's with the VRM1 - the hottest of the two in my case - mostly 10 to 15 degrees hotter.
I'm no expert, but I've got a gut feeling this odd behavior / thes eodd readings could be driver / software related.
I have no issues yet with 9.2 Beta yet, so I'll just wait and see what the next real update brings.