Why can I not stop my 390 Xfire from throttling on the core and voltage?

[TonyTurbo78]

Hi guys, this is really starting to annoy me.

When gaming, in MSI Afterburner overlay, I can clearly see my core clocks and voltage fluctuating. I have set 1050MHz on the core for both cards, yet 90% of the time I see they fluctuate between 1050MHz and 950MHz, with the voltage fluctuating as well. When I bench, the clocks stay where they should with no fluctuation at all, it's just when I game and gpu usage drops below 90% on each card. The bigger the usage drop, the bigger the core drop and voltage drop, surely this isn't right to have the core clocks dropping just because crossfire scaling drops below 90% on both cards. Any ideas why they would be doing this? I've tried removing any frame cap in games to let them run as fast as they can, I've put 50% power boost in Afterburner, I've reinstalled the latest version of MSI AB, but nothing seems to lock the core at 1050MHz unless I get more than 90% usage on the cards.

Please help me, doing my swede in here. These are my MSI AB settings

Spoiler

 

[TonyTurbo78]

nope, still the same. Unless I get more than 90% usage on both cards, my core clocks drop to under 1000MHz.

 

[TonyTurbo78]

hmmmm tried that Nails, ran Witcher 3 and I was getting 20% usage on both cards, with the core clocks at 300MHz each lol. Maybe an issue with MSI Afterburner and new 3 series AMD cards? Could they not be supported in some way?

 

[TonyTurbo78]

core clocks went to 300MHz at desktop.

 

[TonyTurbo78]

i'll just let them throttle, cant be arsed to fiddle anymore. It's not like im seeing any frame drop or anything, I was just curious why these cards are doing it where as my old 7950 crossfire wasn't.