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On the topic of efficiency cores: As someone with a 5900x I wish I had picked a more efficient cpu. Do consider idle and low usage power draw. My room turns in

On the topic of efficiency cores: As someone with a 5900x I wish I had picked a more efficient cpu. Do consider idle and low usage power draw. My room turns into an oven even just watching YouTube.

agentgumshoe 3y ago
Have you enabled Eco mode? You can do so manually in the BIOS if you can't use the AMD software (e.g. https://www.pcworld.com/article/1352253/how-to-enable-eco-mode-with-ryzen-7000.html https://www.pcworld.com/article/1352253/how-to-enable-eco-mo...)
- jrockway 3y ago
  It seems like AMD's power savings just doesn't compete with Intel. I'm a few generations out of date, but my computer setup idles at ~200W, whereas a few-generations-older Intel HEDT that it replaced idled near 50W. Not turning my computer off at night costs $14 a month! (BTW, monitors will get you. With my monitors on reading HN, I'm burning 400W!)
  - xuki 3y ago
    Holy cow, that’s a lot of power just for idling. For comparison, a Mac Studio idle at 9-10W: https://support.apple.com/en-au/HT213100 https://support.apple.com/en-au/HT213100
- pohuing 3y ago
  I've played with it before yeah. But I think ultimately it comes down to the io die never really clocking down, the wattage per core is insignificant as far as I can tell thanks to parking and entire ccd. Same story with my gpu which for some reason thinks running vram at 2ghz at idle is necessary. At least this heat prepared me for summer :D
  - formerly_proven 3y ago
    Try physically disconnecting all but one monitor, AMD's broken power management with more than one monitor has been a meme for about 15 years now.
lhl 3y ago
For YouTube, I'd recommend setting up HW decoding. Depending on your distro and GPU, it can be a pain to set up, but it's much more efficient: https://wiki.archlinux.org/title/Hardware_video_acceleration https://wiki.archlinux.org/title/Hardware_video_acceleration Personally, I've found over the past few years that AMD parts tend to have better perf/watt than Intel parts for both laptops and desktops and I think most benchmarks tend to corroborate that experience: https://hothardware.com/reviews/amd-ryzen-5-7600-ryzen-7-7700-and-ryzen-9-7900-65w-review?page=3#:~:text=AMD%2065W%20Ryzen%205/7/9%207000%20Total%20System%20Power%20Consumption https://hothardware.com/reviews/amd-ryzen-5-7600-ryzen-7-770... Someone mentioned Eco mode (which is easy if your BIOS supports it) - another option is futzing with PBO2 Curve Optimizer. Most chips can support a -10 on all cores but lots of people run up to -20 or even -30. This can make a pretty huge difference in temps/wattage. I lowered my CPU temps by >10C w/ no performance loss on my 5950X. You can also set the PPT to whatever max power you want to use. Here's a guide if you're going to explore some that more: https://skatterbencher.com/amd-precision-boost-overdrive-2/ https://skatterbencher.com/amd-precision-boost-overdrive-2/

On the topic of efficiency cores: As someone with a 5900x I wish I had picked a more efficient cpu. Do consider idle and low usage power draw. My room turns into an oven even just watching YouTube.

agentgumshoe 3y ago

Have you enabled Eco mode? You can do so manually in the BIOS if you can't use the AMD software (e.g. https://www.pcworld.com/article/1352253/how-to-enable-eco-mode-with-ryzen-7000.html https://www.pcworld.com/article/1352253/how-to-enable-eco-mo...)

jrockway 3y ago
It seems like AMD's power savings just doesn't compete with Intel. I'm a few generations out of date, but my computer setup idles at ~200W, whereas a few-generations-older Intel HEDT that it replaced idled near 50W. Not turning my computer off at night costs $14 a month! (BTW, monitors will get you. With my monitors on reading HN, I'm burning 400W!)
- xuki 3y ago
  Holy cow, that’s a lot of power just for idling. For comparison, a Mac Studio idle at 9-10W: https://support.apple.com/en-au/HT213100 https://support.apple.com/en-au/HT213100
pohuing 3y ago
I've played with it before yeah. But I think ultimately it comes down to the io die never really clocking down, the wattage per core is insignificant as far as I can tell thanks to parking and entire ccd. Same story with my gpu which for some reason thinks running vram at 2ghz at idle is necessary. At least this heat prepared me for summer :D
- formerly_proven 3y ago
  Try physically disconnecting all but one monitor, AMD's broken power management with more than one monitor has been a meme for about 15 years now.

lhl 3y ago

For YouTube, I'd recommend setting up HW decoding. Depending on your distro and GPU, it can be a pain to set up, but it's much more efficient: https://wiki.archlinux.org/title/Hardware_video_acceleration https://wiki.archlinux.org/title/Hardware_video_acceleration Personally, I've found over the past few years that AMD parts tend to have better perf/watt than Intel parts for both laptops and desktops and I think most benchmarks tend to corroborate that experience: https://hothardware.com/reviews/amd-ryzen-5-7600-ryzen-7-7700-and-ryzen-9-7900-65w-review?page=3#:~:text=AMD%2065W%20Ryzen%205/7/9%207000%20Total%20System%20Power%20Consumption https://hothardware.com/reviews/amd-ryzen-5-7600-ryzen-7-770... Someone mentioned Eco mode (which is easy if your BIOS supports it) - another option is futzing with PBO2 Curve Optimizer. Most chips can support a -10 on all cores but lots of people run up to -20 or even -30. This can make a pretty huge difference in temps/wattage. I lowered my CPU temps by >10C w/ no performance loss on my 5950X. You can also set the PPT to whatever max power you want to use. Here's a guide if you're going to explore some that more: https://skatterbencher.com/amd-precision-boost-overdrive-2/ https://skatterbencher.com/amd-precision-boost-overdrive-2/