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I undervolted my Nitro+ RX480 by 5mv...

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Mot666

Registered
Joined
Jun 25, 2016
...using Wattman, at State 7 only and it made it 5-6 degrees cooler max temp in Valley Benchmark. I did the test a couple times, each time it went from 78 degrees max to 72/73. Im new to this kind of thing so I'm not sure what to think. Good/Bad result?
 

bob4933

Member
Joined
Jan 3, 2014
Any improvement is a good result.

That said, 5mV isnt much at all tbh. If you saw temps drop that far from that minor adjustment, I would consider that a pretty huge win.
 
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Mot666

Registered
Joined
Jun 25, 2016
It ended up becoming unstable at -20mv on State 7 when I dropped State 6 down 5mv ...then for some reason it was unstable all the back up to stock 1150mv with State 6 at stock. It was fine this morning when I was testing at 1145mv. Oh well I'll just have to settle for the frame rate limiter. :sly:
 

Nebulous

Señor Senior, Senior
Joined
Oct 11, 2002
Location
The Empire State
Framerate limiter? In wattman? I didn't know that. I don't use wattman as it's just confusing. I use MSI Afterburner. No issues with framerates unless it's locked in the games I play.
 
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Mot666

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Jun 25, 2016
Its actually in the global graphics settings(the tab next to the wattman one). I also turned on 'power efficiency'. That made a HUGE difference. Wish I done that this morning instead of spending all that time trying to get a stable undervolt.
 

idkfa

Member
Joined
Feb 7, 2013
Can you explain what differences you experienced with "power efficiency" on? I imagine your card won't stay in the highest state then all the time? I picked up a 480 myself and hadn't really time to really get into it. I undervolted it by 25mV on the highest state but did not see such a noticeable drop in temperature. I will check it out this weekend.

So far I'm running with 1400 Mhz core clock, 2100 Mhz memory clock on a -25mV (1.125 V) undervolt on the highest state. With power limit set to +50% and a temperature goal of 75 °C I never leave the highest state under load anyway. Which is kind of confusing though, as some youtube videos suggested raising the temperature goal and power limit to achieve a better stability on the highest state (reduce thermal throttling). But my card reaches 75 °C (adjusted fan curve as I'm gaming with headphones anyway and it's still a lot quieter than my old 580) still I don't see thermal throttling.
 
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Mot666

Registered
Joined
Jun 25, 2016
When using MSI Afterburner (so Riva Tuner) to display GPU Wattage and temp etc, the watt usage is less at the cost of frames per second when I was using Valley benchmark. Which is fine for me cause normally I only want 60 fps. I'd give you more information but I didn't really do much testing with Power Efficiency.