are there no mor tasks for nvidia gpus?

Neither of your computers is showing a GPU

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can you instruct me how i can use them because i cant find anything

can you instruct me how i can use them because i cant find anything

As I said neither of your computers has a GPU that Boinc can detect.

This may well mean you do not have the correct drivers installed.

Do you know the make and mode of the GPU's you have installed?

And is it both machines or just one?

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the arm is a raspi so....

the main pc has a geforce gtx960 oc edition from gigabyte

Your GTX960 is not showing up against your computer. This may be because the wrong drivers have been installed by MS - the solution is to prevent Window 10 updating graphics drivers, then get the drivers from the Nvidia site, then perform a "clean" installation, which is normally an option from the "advanced" options.

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Bob Smith
Member of Seti PIPPS (Pluto is a Planet Protest Society)
Somewhere in the (un)known Universe?

i did this already...

Please exit BOINC completely, then restart it.
Open BOINC Manager, press CTRL+SHIFT+E simultaneously.
From the event log that you opened, copy the first 30 or so lines and post them here.

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04.06.2016 23:27:13 | | Nicht erkanntes Tag in cc_config.xml: </log_flags>
04.06.2016 23:27:13 | | Nicht erkanntes Tag in cc_config.xml: </cc_config>
04.06.2016 23:27:13 | | Nicht erkanntes Tag in cc_config.xml: <cc_config>
04.06.2016 23:27:13 | | Fehler in den cc_config.xml Optionen
04.06.2016 23:27:13 | | Fehlendes Endetag in cc_config.xml
04.06.2016 23:27:13 | | Starting BOINC client version 7.6.22 for windows_x86_64
04.06.2016 23:27:13 | | log flags: file_xfer, sched_ops, task
04.06.2016 23:27:13 | | Libraries: libcurl/7.45.0 OpenSSL/1.0.2d zlib/1.2.8
04.06.2016 23:27:13 | | Running as a daemon (GPU computing disabled)
04.06.2016 23:27:13 | | Data directory: G:\Boinc2
04.06.2016 23:27:13 | | Running under account boinc_master
04.06.2016 23:27:13 | | No usable GPUs found
04.06.2016 23:27:13 | | Host name: FelixPC
04.06.2016 23:27:13 | | Processor: 12 GenuineIntel Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz [Family 6 Model 63 Stepping 2]
04.06.2016 23:27:13 | | Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss htt tm pni ssse3 fma cx16 sse4_1 sse4_2 movebe popcnt aes f16c rdrandsyscall nx lm avx avx2 vmx tm2 dca pbe fsgsbase bmi1 smep bmi2
04.06.2016 23:27:13 | | OS: Microsoft Windows 10: Core x64 Edition, (10.00.10586.00)
04.06.2016 23:27:13 | | Memory: 15.83 GB physical, 31.83 GB virtual
04.06.2016 23:27:13 | | Disk: 256.11 GB total, 14.15 GB free
04.06.2016 23:27:13 | | Local time is UTC +2 hours
04.06.2016 23:27:13 | | VirtualBox version: 5.0.20
04.06.2016 23:27:13 | Asteroids@home | URL http://asteroidsathome.net/boinc/; Computer ID 294133; resource share 100
04.06.2016 23:27:13 | Asteroids@home | Your current settings do not allow tasks from this project. To fix this, you can change Project Preferences on the project's web site.
04.06.2016 23:27:13 | ATLAS@home | URL http://atlasathome.cern.ch/; Computer ID 26677; resource share 100
04.06.2016 23:27:13 | BURP | URL http://burp.renderfarming.net/; Computer ID 69610; resource share 100
04.06.2016 23:27:13 | climateprediction.net | URL http://climateprediction.net/; Computer ID 1400401; resource share 100
04.06.2016 23:27:13 | Collatz Conjecture | URL https://boinc.thesonntags.com/collatz/; Computer ID 523440; resource share 1000
04.06.2016 23:27:13 | Collatz Conjecture | Your current settings do not allow tasks from this project. To fix this, you can change Project Preferences on the project's web site.
04.06.2016 23:27:13 | DENIS@Home | URL http://denis.usj.es/denisathome/; Computer ID 3877; resource share 100
04.06.2016 23:27:13 | Einstein@Home | URL http://einstein.phys.uwm.edu/; Computer ID 12018206; resource share 100
04.06.2016 23:27:13 | Einstein@Home | Your current settings do not allow tasks from this project. To fix this, you can change Project Preferences on the project's web site.
04.06.2016 23:27:13 | FiND@Home | URL http://findah.ucd.ie/; Computer ID 136119; resource share 100
04.06.2016 23:27:13 | GPUGRID | URL http://www.gpugrid.net/; Computer ID 297779; resource share 10000
04.06.2016 23:27:13 | LHC@home 1.0 | URL http://lhcathomeclassic.cern.ch/sixtrack/; Computer ID 10371102; resource share 1000
04.06.2016 23:27:13 | malariacontrol.net | URL http://www.malariacontrol.net/; Computer ID 1547512; resource share 100
04.06.2016 23:27:13 | Milkyway@Home | URL http://milkyway.cs.rpi.edu/milkyway/; Computer ID 633638; resource share 100
04.06.2016 23:27:13 | Milkyway@Home | Your current settings do not allow tasks from this project. To fix this, you can change Project Preferences on the project's web site.
04.06.2016 23:27:13 | Moo! Wrapper | URL http://moowrap.net/; Computer ID 403477; resource share 100
04.06.2016 23:27:13 | Moo! Wrapper | Your current settings do not allow tasks from this project. To fix this, you can change Project Preferences on the project's web site.
04.06.2016 23:27:13 | NFS@Home | URL http://escatter11.fullerton.edu/nfs/; Computer ID 1768469; resource share 100
04.06.2016 23:27:13 | Poem@Home | URL http://boinc.fzk.de/poem/; Computer ID 960518; resource share 100
04.06.2016 23:27:13 | RNA World | URL http://www.rnaworld.de/rnaworld/; Computer ID 44014; resource share 100
04.06.2016 23:27:13 | SETI@home | URL http://setiathome.berkeley.edu/; Computer ID 7785121; resource share 100
04.06.2016 23:27:13 | Universe@Home | URL http://universeathome.pl/universe/; Computer ID 10576; resource share 100
04.06.2016 23:27:13 | VirtualLHC@home | URL http://lhcathome2.cern.ch/vLHCathome/; Computer ID 84762; resource share 100
04.06.2016 23:27:13 | World Community Grid | URL http://www.worldcommunitygrid.org/; Computer ID 3344358; resource share 100
04.06.2016 23:27:13 | SETI@home | General prefs: from SETI@home (last modified 04-Jun-2016 20:50:13)
04.06.2016 23:27:13 | SETI@home | Host location: none
04.06.2016 23:27:13 | SETI@home | General prefs: using your defaults
04.06.2016 23:27:13 | | Reading preferences override file
04.06.2016 23:27:13 | | Preferences:
04.06.2016 23:27:13 | | max memory usage when active: 8104.93MB
04.06.2016 23:27:13 | | max memory usage when idle: 12157.40MB
04.06.2016 23:27:13 | | max disk usage: 10.00GB
04.06.2016 23:27:13 | | max CPUs used: 8
04.06.2016 23:27:13 | | (to change preferences, visit a project web site or select Preferences in the Manager)
04.06.2016 23:27:26 | SETI@home | update requested by user
04.06.2016 23:27:28 | SETI@home | Sending scheduler request: Requested by user.
04.06.2016 23:27:28 | SETI@home | Not requesting tasks: "no new tasks" requested via Manager
04.06.2016 23:27:30 | SETI@home | Scheduler request completed
04.06.2016 23:27:49 | World Community Grid | task postponed 600.000000 sec: Waiting to acquire lock

04.06.2016 23:27:13 | | Running as a daemon (GPU computing disabled)

I believe that line shows you have installed Boinc as a service;

That disables the GPU. it's a Microsoft thing not Boinc

Borrowing this from an older thread:

So you'll have to uninstall BOINC and reinstall it, then in the third installer screen click Advanced and uncheck the Protected Application Execution option before continuing the installation.

Once you have done that if you have the correct GPU drivers installed (from Nvidia not Microsoft) it should work.

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thank you now it works
now there is more computing power for the projects