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R9 390 cannot undervolt

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So before I installed the new relive drivers, i was able to undervolt my 390 by -100mV with a 1010mHz (40mHz downclock) clock speed in MSI afterburner. After installing the relive drivers, MSI afterburner doesnt work anymore and I tried using the wattman to undervolt again. So i changed the voltage control to manual and keyed in a -100mV undervolt (1275mV to 1175mV) but every time I press enter the values will always reset to 1275mV again. 

 

So my question is, is this a bug? or is this something AMD disabled on the 390? 

 

I really want to undervolt it because the card use to run a lot cooler with less noise while not impacting performance to badly.

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The new drivers don't play well with overclocks and undervolting for some people. I'm now running my card  at stock clocks because of it.

CPU i7 6700 Cooling Cryorig H7 Motherboard MSI H110i Pro AC RAM Kingston HyperX Fury 16GB DDR4 2133 GPU Pulse RX 5700 XT Case Fractal Design Define Mini C Storage Trascend SSD370S 256GB + WD Black 320GB + Sandisk Ultra II 480GB + WD Blue 1TB PSU EVGA GS 550 Display Nixeus Vue24B FreeSync 144 Hz Monitor (VESA mounted) Keyboard Aorus K3 Mechanical Keyboard Mouse Logitech G402 OS Windows 10 Home 64 bit

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