Is it worth dropping a PPT if it doesn't meet the limit?
Is it worth dropping a PPT if it doesn't meet the limit?
I’ve recently switched to an AMD system after spending two decades building PCs, and I’m still figuring out some CPU settings without a clear answer from searches. The 9800x3D has a PPT limit of 162W, but it rarely exceeds 100W in practice. However, it’s mentioned that AMD tends to push higher wattage for better performance, so reducing the PPT limit might help with thermal management and lifespan.
My concern is whether keeping the PPT limit at 162W would still impact longevity, even if I never reach that usage level. I don’t overclock or enable any overclocking features like PBO or Expo. My system runs at 4.7-5.0 clocks, which is sufficient for my current use—primarily gaming on a single monitor.
My cooling setup is solid, with excellent airflow and an air-cooled case. I usually stay well below 60°C during idle. I’m curious about whether lowering the PPT limit to the 120-135W range could still benefit longevity, even if it never gets close to 162W. I’ve noticed that higher-end Intel CPUs often run cooler at idle, though I understand load temperatures are more critical.
I also heard AMD can perform better and more stably at lower wattages, but I’m not sure if adjusting the PPT limit is necessary. Thank you for any advice!
You are only observing the average wattage, even for minimum and maximum values, which is just the mean of several readings. The PPT reflects the peak including spikes that aren't captured by your monitoring. However, it's safe to reduce it, as a crash or performance drop during heavy tasks might indicate the issue, allowing you to restart if necessary.
I appreciate the response.
However, two points need clarification:
1) My setup uses HWMonitor, which displays min, average, and max levels. I don’t believe the max reading is showing 101W as an actual average—even if it were, it wouldn’t mathematically equal around 162W. Based on what I’ve seen so far, I haven’t observed wattage exceeding roughly 101W.
2) If the readings are accurate and I’m never approaching the 162 PPT limit, would reducing power even make a difference in temperatures or the CPU’s lifespan? I doubt it, but I’m uncertain whether adjusting the PPT limit could help if I’m not near the maximum. Maybe AMD’s architecture still uses power efficiently regardless of the limit.
Thank you for any information you can share about my question.
It is unlikely that it would make much of a difference, as lowering the power target does not directly change the power curve itself. It only limits how high the CPU can go if needed. Higher power draw does not directly cause any more or less wear either, it is repeated large swings in temperatures causing expansion and compression that eventually weaken the silicon. With appropriate cooling and thermal transfer, you are at virtually 0 risks. You can test your CPU thermal load using a tool like Cinebench R23 (Cinebench 2024 exists, but it draws around 40W less than R23 on my 5900X). Depending on results, applying an undervolt offset using PBO might be what you're looking for. But if you max out under 80 degrees with Cinebench, I'd say you have nothing to worry about.