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Overclocking ASUS Dual RX 480 O4G

In GPUTweak2 (Asus tweaking tool) the card's default voltage is set to 1.137v and RAM clock 7000Mhz on all three modes below:
1280 Mhz (Silent Mode) -10 Power Limit
1300 MHz (Gaming Mode) 0 Power Limit
1320 MHz (OC Mode) +10 Power Limit

I have uninstalled GPUTweak2 and installed my favorite MSI Afterburner. I want to overclock without touching the voltage (for another year or so). My current settings:
1340 MHz, 7300Mhz, +25 Power Limit, 1.137v

The core gives stable 1340Mhz while playing Witcher 3 (75c / 64% fan) and passed FireStrike Extreme stress test with 98.7% (80c / 67% fan). I will raise core to 1350Mhz today on same settings and see how it goes.

My question is what does Power Limit actually do? The RX480 has default TDP of 150w, so does +25 Power Limit raise it to 175w?

0 Power Limit = 150w ??

And does raising Power Limit alone (not Voltage) raise Temperature too???
6 answers Last reply Best Answer
More about overclocking asus dual 480 o4g
  1. Yeah power limit basically limits the amount of wattage the card can draw. If you raise it (I normally max it out when overclocking) then that will no longer hold the card back based on the limit which shifts the overclocking limits to other things like temperature.

    Power limit is usually a % of the standard tdp not a wattage figure.
  2. RobCrezz said:
    Yeah power limit basically limits the amount of wattage the card can draw. If you raise it (I normally max it out when overclocking) then that will no longer hold the card back based on the limit which shifts the overclocking limits to other things like temperature.

    Power limit is usually a % of the standard tdp not a wattage figure.


    I just noticed the power monitor graph in afterburner shows the power in W and not %. My card is fully stable 1350/7300 +25 power limit giving constant stable 1350Mhz graph line during gaming at 125w max load. I understand the +50 limit will allow the card to suck full 150w power if required. I think its not required right now. Maybe in future if I want to OC further I will raise it to +50.
  3. The power limit on its own will just be a limit, it will only hold it back if its wanting to boost up to a higher clock speed.
  4. RobCrezz said:
    The power limit on its own will just be a limit, it will only hold it back if its wanting to boost up to a higher clock speed.


    Hmm... so if I raise the power limit to +50, the card will only use 125w and not 150w for 1350Mhz?
  5. Best answer
    manigma said:
    RobCrezz said:
    The power limit on its own will just be a limit, it will only hold it back if its wanting to boost up to a higher clock speed.


    Hmm... so if I raise the power limit to +50, the card will only use 125w and not 150w for 1350Mhz?


    Its hard to say, as different kinds of load will use more power than others. But with a higher power limit your card wont be artificially be limited from clocking higher.

    Try maxing it out and seeing if your clock speed changes at all under load. If you are holding 1350mhz in everything anyway, then its unlikely to make any difference.
  6. I will try it out. But I already get constant 1350Mhz in Witcher 3 (no drops in graph). Raising power limit from +0/100w (1300/7000) to +25/125w (1350/7300) already raised the temps by 5c (72c to 77c in witcher). So I am reluctant to raise the power limit further. I will try and see if +50 does not draw unnecessary power or raises temps further. Will also benchmark to see any performance gains +25 vs +50. Thanks!
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