You have probably already done these, but just a couple of things to double check.
1. Have you tried maximizing your game? I've noticed that some of my games don't play nice if I use boarder-less or windowed modes.
2. Do you have AMD Evolved installed? If so maybe double check to make sure the game is optimized. Sometimes there may be settings enabled which are holding you back.You could also try tweaking the settings under the game profile in AMD setting. I usually adjust one setting at a time so that if I find fix, I know which setting it was I adjusted.
3. Try disabling ULPS on your cards .
4. If all else fails try updating your driver. Version 16.6.1 is now available and as a bonus includes an updated crossfire profile for Hitman!
Let us know if this helps
Looks like "power efficiency" switch (or whatever it called in English) does the trick.
However, I still don't understand that kind of efficiency, when in game it corrupts the performance, but having game minimized maxing out power consumption.
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Have u tried to disable ULPS.
Link is below
Also try updating your drivers to 16.6.1, uninstall the old ones first with DDU.
Those drivers came out a few days ago, i have noticed a slight performance increase but nothing worth noting.
I think AMD Should really have power efficiency turned off by default there are hundred of threads about people complaining about performance and the solution is to disable power efficiency.
AMDMatt if your reading this please suggest for the up coming drivers to have power efficiency turned off. no one buys an AMD Card expecting it to be power efficient, we buy AMD cards because of Price for performance.
With the new RX480 cards coming out i expect there to be even more threads about stuttering, poor performance and throttling
I'd say more, no one buys a videocard to save energy.
They really must check the card efficiency while game is minimized though. I dunno, can anyone reproduce the issue - start a DX12 game (Doom, Hitman, maybe another) and minimize it - do your GPU heat like crazy and your coils whine like a girls?
It just an unnecessary feature that tarnish the AMD Experience in my opinion. Once the feature is disabled the games runs smoothly.