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World Community Grid Forums
Category: Support
Forum: Android Support Forum
Thread: Best bang-for-the-buck Android device |
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Thread Status: Active Total posts in this thread: 220
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cristipurdel
Senior Cruncher Joined: Dec 13, 2008 Post Count: 158 Status: Offline Project Badges: 
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Well... these are using the power adapters that came with it and are plugged straight to the wall. So, it isn't the USB port or usb hub that is the problem. I am playing around with core counts now as I am running another app alongside them. The whole point of the phones are to pay for themselves while DC'ing. I would also measure power draw, with screen off. But my guess is still that you are going to be thermal throttled (check with CPU-Z) somehow, and since they are cheap phones with low level components, you will see CPU cores parked (use CPU Monitor) in order to maintain a relative high CPU frequency |
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Coleslaw
Veteran Cruncher USA Joined: Mar 29, 2007 Post Count: 1343 Status: Offline Project Badges: 
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Bumping the Octocore (Sensa) down to 5 cores for BOINC while running my beer money app, it seems to keep the charge. I did however make sure it was fully charged before starting things up this time. The other one is currently assigning 6 cores, but I am awaiting it to get fully charged before starting the other app.
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Coleslaw
Veteran Cruncher USA Joined: Mar 29, 2007 Post Count: 1343 Status: Offline Project Badges:
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6 cores after full charge and running my app is keeping it charged. Bumped the 5 core one up to 7 now to see if it maintains the charge....
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Coleslaw
Veteran Cruncher USA Joined: Mar 29, 2007 Post Count: 1343 Status: Offline Project Badges:
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Looks like 6 cores is the most I can run alongside my other app and still maintain a charge. However, I have seen BOINC pause due to battery temps while doing that. I need to look into options for logging the temps so that I can monitor what is happening while the screen is occupied with other apps going. However, I don't know if I will actually get to spend that much time on it.
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Falconet
Master Cruncher Portugal Joined: Mar 9, 2009 Post Count: 3295 Status: Offline Project Badges: 
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Got 2 Androids working in the past few days. An older phone and a Tablet I got from a consumers association. Both are 4-cores but the phone has 1 GB of RAM and the Tablet has less than 512 MB available - both are running 4 tasks each. Taking between 14-16 CPU hours per task. Hope it's worth it lol
----------------------------------------AMD Ryzen 5 1600AF 6C/12T 3.2 GHz - 85W AMD Ryzen 5 2500U 4C/8T 2.0 GHz - 28W AMD Ryzen 7 7730U 8C/16T 3.0 GHz |
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Coleslaw
Veteran Cruncher USA Joined: Mar 29, 2007 Post Count: 1343 Status: Offline Project Badges:
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Find out how much power they consume. Then look at the results they produce. Compare that to a PC and you typically have your answer. Most people will find ARM processors to be more energy efficient. The rest just depends on the hardware and how you treat it when trying to figure if it was worth it or not.
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Falconet
Master Cruncher Portugal Joined: Mar 9, 2009 Post Count: 3295 Status: Offline Project Badges:
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Yeah I did that. The Rockchip tablet uses 4 watts (m,easured 3.1-3.5) and the phone didn't really show any readings which is strange. But I'll say it is also 4 watts.
----------------------------------------All I have right now are those Androids and a Z3740 tablet using 5.1-6 watts per hour which has close to 5 years of CPU time and 8690 results (UGM1 and VINA sciences). W10 32-bit. AMD Ryzen 5 1600AF 6C/12T 3.2 GHz - 85W AMD Ryzen 5 2500U 4C/8T 2.0 GHz - 28W AMD Ryzen 7 7730U 8C/16T 3.0 GHz |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
4watts each isn't bad. That's about what one of those old fashioned nightlights with screw in bulb would draw. I have 8 phones all plugged into a power charging center. Would be interesting to see how much those draw all together with my kill a watt. I also have two odroid xu4 systems. I don't think those pull too much, but likely more than a phone since it has active cooling and are much more robust.
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Falconet
Master Cruncher Portugal Joined: Mar 9, 2009 Post Count: 3295 Status: Offline Project Badges:
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I think 4 watts is great. All in all, 12 cores running for maybe 2€ per month in electricity bills.
----------------------------------------AMD Ryzen 5 1600AF 6C/12T 3.2 GHz - 85W AMD Ryzen 5 2500U 4C/8T 2.0 GHz - 28W AMD Ryzen 7 7730U 8C/16T 3.0 GHz |
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cristipurdel
Senior Cruncher Joined: Dec 13, 2008 Post Count: 158 Status: Offline Project Badges:
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I am seeing the same thing, 3W for octa core around 1 GHz on 28nm process.
----------------------------------------I've been looking inside an Allview E4 with CM 12.1 and there are some "power parameters" of around maximum 3.2W https://cdn.instructables.com/FGG/ZADM/JEOIQTMT/FGGZADMJEOIQTMT.LARGE.jpg So I guess there is also a power limitation, but you will most probably hit the thermal limitation first |
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