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I just disable PBO on my 3900X - you are 100% correct that an extra 5% performance is not worth the extra 30% power draw/heat.
by alyandon 4y ago
I just disable PBO on my 3900X - you are 100% correct that an extra 5% performance is not worth the extra 30% power draw/heat.
- CharlesW 4y agoFor anyone else not familiar with "PBO", it's AMD's "Precision Boost Overdrive", which is apparently completely different than Precision Boost and Precision Boost 2: https://www.gamersnexus.net/guides/3491-explaining-precision-boost-overdrive-benchmarks-auto-oc https://www.gamersnexus.net/guides/3491-explaining-precision...
- caycep 4y agoThis is the same as AMD "Eco Mode"?
- 0cf8612b2e1e 4y agoI just turned on Eco Mode last night and was pleasantly surprised. In a non rigorous test on my 5600x, Eco Mode had zero change to single core performance, unchanged CPU temp. Multicore saw a 3% performance drop, but temps were ~12C cooler. Test yourself, but I am definitely going to leave it enabled.
- merb 4y agoa 5600x runs at only 65w or so and can be cooled down to 40C like all the time. I'm not sure if I would prefer to run it at 16w lower, because I bareley even reach the tdp or even tjmax.
- anticensor 4y agoPBO also allows undervolting though: I just applied -30 all core offset on my 5950X.
- asynchronyse 4y agoI'm wondering how much clock speed you gave up to achieve stability at -30. I could barely be stable at -15 all core on a 5900X at zero clock offset.
- anticensor 4y agoAbout 300Mhz on each core on average, but the peak frequency on the best core did not change.