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1) Message boards : Generalized Fermat Prime Search : GFN-14 Consecutive Primes Hunt Season is open! (Message 124818)
Posted 1050 days ago by nanoprobe
OK. Thanks. My event log said there were tasks available for ATI GPUs so that's why I asked.
2) Message boards : Generalized Fermat Prime Search : GFN-14 Consecutive Primes Hunt Season is open! (Message 124802)
Posted 1050 days ago by nanoprobe
Just set this up to run but getting no work. No tasks for Nvidia GPUs?
3) Message boards : Generalized Fermat Prime Search : 7970 stops crunching (Message 92960)
Posted 2091 days ago by nanoprobe
Please post the entire contents of stderr.txt.

Here is the original one that kept stopping:

geneferocl3 3.2.9 (Windows/OpenCL-NTT/32-bit)
Copyright 2001-2015, Yves Gallot
Copyright 2009, Mark Rodenkirch, David Underbakke
Copyright 2010-2012, Shoichiro Yamada, Ken Brazier
Copyright 2011-2015, Iain Bethune, Michael Goetz, Ronald Schneider
Genefer is free source code, under the MIT license.

Command line: projects/www.primegrid.com/primegrid_genefer_3_2_9_3.09_windows_intelx86__atiGFN19.exe -boinc -q 1044484^524288+1 --device 0

Priority change succeeded.
Using OCL3 transform

Running on platform 'AMD Accelerated Parallel Processing', device 'Tahiti', version 'OpenCL 1.2 AMD-APP (1348.5)' and driver '1348.5 (VM)'.

Resuming 1044484^524288+1 from a checkpoint (10354687 iterations left)

maxErr exceeded for 1044484^524288+1, 1.0000 > 0.4500
MaxErr exceeded may be caused by overclocking, overheated GPUs and other transient errors.
maxErr exceeded by all available transform implementations
Waiting 10 minutes before attempting to continue from last checkpoint...

geneferocl3 3.2.9 (Windows/OpenCL-NTT/32-bit)
Copyright 2001-2015, Yves Gallot
Copyright 2009, Mark Rodenkirch, David Underbakke
Copyright 2010-2012, Shoichiro Yamada, Ken Brazier
Copyright 2011-2015, Iain Bethune, Michael Goetz, Ronald Schneider
Genefer is free source code, under the MIT license.

Command line: projects/www.primegrid.com/primegrid_genefer_3_2_9_3.09_windows_intelx86__atiGFN19.exe -boinc -q 1044484^524288+1 --device 0

Priority change succeeded.
Using OCL3 transform

Running on platform 'AMD Accelerated Parallel Processing', device 'Tahiti', version 'OpenCL 1.2 AMD-APP (1348.5)' and driver '1348.5 (VM)'.

Resuming 1044484^524288+1 from a checkpoint (10354687 iterations left)

maxErr exceeded for 1044484^524288+1, 1.0000 > 0.4500
MaxErr exceeded may be caused by overclocking, overheated GPUs and other transient errors.
maxErr exceeded by all available transform implementations
Waiting 10 minutes before attempting to continue from last checkpoint..

Followed Rafael's advice and down clocked to 1000/1225 and started a new task. 10 minutes in and still running so hopefully we're good. Here's the stderr.txt. file from that task:

geneferocl3 3.2.9 (Windows/OpenCL-NTT/32-bit)
Copyright 2001-2015, Yves Gallot
Copyright 2009, Mark Rodenkirch, David Underbakke
Copyright 2010-2012, Shoichiro Yamada, Ken Brazier
Copyright 2011-2015, Iain Bethune, Michael Goetz, Ronald Schneider
Genefer is free source code, under the MIT license.

Command line: projects/www.primegrid.com/primegrid_genefer_3_2_9_3.09_windows_intelx86__atiGFN19.exe -boinc -q 1044522^524288+1 --device 0

Priority change succeeded.
Using OCL3 transform

Running on platform 'AMD Accelerated Parallel Processing', device 'Tahiti', version 'OpenCL 1.2 AMD-APP (1348.5)' and driver '1348.5 (VM)'.

Starting initialization...
Initialization complete (11.187 seconds).
Testing 1044522^524288+1...
Estimated time remaining for 1044522^524288+1 is 3:35:46

Have never run the 7970 at PG before. Learned something new. Thanks Rafael.

Now I have to come up with an app_info file to get my R9 285 to run here.
4) Message boards : Generalized Fermat Prime Search : 7970 stops crunching (Message 92957)
Posted 2091 days ago by nanoprobe
I'm trying to run the GFN19 tasks on my 7970. They run for 2-3 minutes and then just stop. There is no evidence of a driver crash and other ATI Opencl projects (POEM, Einstein) run fine. OS is Win7 Pro with XEON 2683 V3 and 32 GB DDR4 memory. Any suggestions?

Go into the Boinc directory. Find the slots where the GFN WUs are supposedly running and check the Stderr file. Is there a "Max Err" message in there?

Yes, several of them.
maxErr exceeded for 1044484^524288+1, 1.0000 > 0.4500
MaxErr exceeded may be caused by overclocking, overheated GPUs and other transient errors.
maxErr exceeded by all available transform implementations
Waiting 10 minutes before attempting to continue from last checkpoint...

The card is not overclocked. (factory settings are 1050/1425) I watched the temps before it stopped running and they never exceeded 65c. Should I try down clocking?

EDIT: Down clocked to 1000/1400 and restarted a task. Didn't even run for 30 seconds before stopping again.
5) Message boards : Generalized Fermat Prime Search : 7970 stops crunching (Message 92954)
Posted 2091 days ago by nanoprobe
I'm trying to run the GFN19 tasks on my 7970. They run for 2-3 minutes and then just stop. There is no evidence of a driver crash and other ATI Opencl projects (POEM, Einstein) run fine. OS is Win7 Pro with XEON 2683 V3 and 32 GB DDR4 memory. Any suggestions?
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