Post AbQfpX05yM7PCzVk92 by amanda@social.spejset.org
 (DIR) More posts by amanda@social.spejset.org
 (DIR) Post #AbQfpX05yM7PCzVk92 by amanda@social.spejset.org
       2023-11-01T11:09:16Z
       
       0 likes, 2 repeats
       
       Does anyone have numbers on computer power efficiency v. manufacturing energy? Ie when, if at any point, is a computer so old it’s actually a net negative to keep using it rather than upgrading?#RedueReuseRecycle
       
 (DIR) Post #AbQfpXmJ56gPcW4FI8 by grillchen@brotka.st
       2023-11-03T12:21:41.006457Z
       
       0 likes, 0 repeats
       
       @amanda paper is behind a paywall but here is an aritcle talking about it.https://www.networkworld.com/article/2229029/computer-factories-eat-way-more-energy-than-running-the-devices-they-build.html"According to ASU engineer Eric Williams 227 to 270 kilograms (or 500 to 594 pounds) of carbon dioxide are emitted in manufacturing a laptop computer. The range in the numbers is due to variability in materials used and different manufacturing processes. The amount is surprisingly large, Williams said in a statement. It shows that the carbon dioxide emissions resulting from energy consumed in the manufacture of a laptop computer can in some cases come close to or equal the emissions resulting from the manufacture of a refrigerator - meaning computer manufacturing is relatively more energy intensive, he saidFrom the research paper: "Results show that manufacturing the computer requires 3010-4340 MJ of primary energy, 52-67% less than the energy to make a desktop computer. The manufacturing phase represents 62-70% of total primary energy of manufacturing and operation. This indicates, as for desktop computers, that mitigating manufacturing energy use, for example through extending lifespan, can be an important strategy to manage the life cycle energy of laptop computers.""i personally only use used devices or for my high perfomance desktop pc upgrade parts when necessary (cant ). roughly every 5-10 years
       
 (DIR) Post #AbRTcCO8ICplDxafLM by maswan@mastodon.acc.sunet.se
       2023-11-01T11:16:08Z
       
       0 likes, 1 repeats
       
       @amanda Having recently done the numbers for servers for scientific computing, the manufacturing seems to be 1-2 tons of CO2e. For running computers in SE2, assuming the local power mix emissions (11-15 g/kWh), the manufacturing emissions totally dominates for both 5 and 10 year lifespans even when running them flat out 24/7.Money is a different matter, where 5-7 years lifetime is more reasonable since you get 1-2 orders of magnitude more compute per kW.Slides: https://indico.cern.ch/event/1289243/contributions/5583080/attachments/2738397/4762827/20231020-CarbonNegativeComputing.pdf