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POWERTUNE SET TO 20% !!! PLEASE READ AND ENLIGHTEN !! AM I JUST AN IDIOT ? - Page 2

post #11 of 14
PowerTune is not about saving energy, it's about designing a GPU that ships from the factory with a higher reference clockspeed.

Prior to the advent of PowerTune, we set the GPU clockspeed based on the market's most intense applications, which recently has been Furmark and the AvP benchmark. We'd run those applications at full throttle and increase the clockspeed until we hit the desired board TDP, and then that would be your final clockspeed. Maybe it was only 600MHz to achieve, as an example, 250W.

The problem with that scenario is that it's completely unrealistic. Nobody buys a GPU to play furmark, and nothing but Furmark/AvP produces that kind of GPU load. So why would you ever let unrealistic applications have that level of control?

So now we have PowerTune, which allows us to use a different set of applications to determine the shipping frequency of the board. It lets us use real games as the baseline, rather than synthetic BS that doesn't represent the real world in any way, shape or form. Real games can have a higher clockspeed, and more real performance because of this system.

To put it simply: the net result is that PowerTune lets AMD ship products to you that are faster than they would be without PowerTune. It's the only technology on the market like it, any any GPU could benefit from having something like it.

Have you ever stopped to wonder why the Radeon 6990 was 830MHz, but the GTX 590 was only 630MHz? Fermi and Northern Islands are both capable of roughly the same clockspeeds. The answer is simple: PowerTune. PowerTune helped the 6990 go from ~650MHz to 800MHz+, and produced a winning product.
post #12 of 14
I want to get this straight...

If I'm on a light overclock with a 7870 (1150/1250) and run a benchmark like 3DMark11 and it scores the same with the power slider at 0% and at 20% I should just leave it at 0% because the top end TDP isn't holding me back? Do I have it right?
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I have Ryzen!
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CPUMotherboardGraphicsRAM
Ryzen 5 1600 3.7GHz 1.3v MSI B350M Mortar Arctic Asus Strix RX470 4GB Corsair Vengance LPX 3200 16GB 
Hard DriveHard DriveCoolingOS
Intel 520 240GB Transcend 480GB Wraith Spire Windows 10 Pro x64 
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Dell UltraSharp U2412M CM Quick Fire (Brown Switches) Rosewill Valens 500W Gold Corsiar Carbide Air 240 
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post #13 of 14
Correct.
post #14 of 14
Quote:
Originally Posted by Thracks View Post

Correct.

So say for example, if I was folding on a HD7970, I had found the highest stable clock speed on stock volts, moving the powertune bar to +20 or -20 made no difference in performance. What would be the benefit of having the bar at -20?
EG the card uses less electricity?
Edited by Newbie2009 - 4/1/13 at 7:16am
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Overclock.net › Forums › Graphics Cards › AMD/ATI › POWERTUNE SET TO 20% !!! PLEASE READ AND ENLIGHTEN !! AM I JUST AN IDIOT ?