I stopped running SETI just over a month ago as hardware problems caused the PC to crash with SETI (CUDA units were fine). I have now replace my motherboard and started SETI up again but it has not downloaded any CUDA units so is doing no GPU processing. Is there a general issue or is there something I need to set?
I have an NVIDIA GeForce GTX 560 Ti with an AMD Phenom X6 running Windows 7 64 bit.
The version of BOINC is 6.12.34
Against the tasks it quotes the application as SETI@home Enhanced 6.03

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extract from the log file

16/01/2012 19:33:01 | | Starting BOINC client version 6.12.34 for windows_x86_64
16/01/2012 19:33:01 | | log flags: file_xfer, sched_ops, task
16/01/2012 19:33:01 | | Libraries: libcurl/7.21.6 OpenSSL/1.0.0d zlib/1.2.5
16/01/2012 19:33:01 | | Data directory: C:\ProgramData\BOINC
16/01/2012 19:33:01 | | Running under account Erik
16/01/2012 19:33:01 | | Processor: 6 AuthenticAMD AMD Phenom(tm) II X6 1090T Processor [Family 16 Model 10 Stepping 0]
16/01/2012 19:33:01 | | Processor: 512.00 KB cache
16/01/2012 19:33:01 | | Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 htt pni cx16 syscall nx lm svm sse4a osvw ibs skinit wdt page1gb rdtscp 3dnowext 3dnow
16/01/2012 19:33:01 | | OS: Microsoft Windows 7: Professional x64 Edition, Service Pack 1, (06.01.7601.00)
16/01/2012 19:33:01 | | Memory: 16.00 GB physical, 31.99 GB virtual
16/01/2012 19:33:01 | | Disk: 1.36 TB total, 1.26 TB free
16/01/2012 19:33:01 | | Local time is UTC +0 hours
16/01/2012 19:33:01 | | NVIDIA GPU 0: GeForce GTX 560 Ti (driver version 28562, CUDA version 4010, compute capability 2.1, 1024MB, 922 GFLOPS peak)

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It would be more useful to see the log entries during and after a request for work.

Assuming you didn't change your preferences to exclude GPU work, the most logical explanation would be that there was no work available at the time of your requests. But we can't say that for sure without seeing the aforementioned logs.

The BOINC version you're using has also been cited as making downloads occasionally problematic due to long offset times. Installing an earlier (6.10.xx) version of BOINC seems to help in that regard.

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The log so far for today where 11 units have down loaded is

17/01/2012 19:30:00 | | Starting BOINC client version 6.12.34 for windows_x86_64
17/01/2012 19:30:00 | | log flags: file_xfer, sched_ops, task
17/01/2012 19:30:00 | | Libraries: libcurl/7.21.6 OpenSSL/1.0.0d zlib/1.2.5
17/01/2012 19:30:00 | | Data directory: C:\ProgramData\BOINC
17/01/2012 19:30:00 | | Running under account Erik
17/01/2012 19:30:00 | | Processor: 6 AuthenticAMD AMD Phenom(tm) II X6 1090T Processor [Family 16 Model 10 Stepping 0]
17/01/2012 19:30:00 | | Processor: 512.00 KB cache
17/01/2012 19:30:00 | | Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 htt pni cx16 syscall nx lm svm sse4a osvw ibs skinit wdt page1gb rdtscp 3dnowext 3dnow
17/01/2012 19:30:00 | | OS: Microsoft Windows 7: Professional x64 Edition, Service Pack 1, (06.01.7601.00)
17/01/2012 19:30:00 | | Memory: 16.00 GB physical, 31.99 GB virtual
17/01/2012 19:30:00 | | Disk: 1.36 TB total, 1.26 TB free
17/01/2012 19:30:00 | | Local time is UTC +0 hours
17/01/2012 19:30:00 | | NVIDIA GPU 0: GeForce GTX 560 Ti (driver version 28562, CUDA version 4010, compute capability 2.1, 1024MB, 922 GFLOPS peak)
17/01/2012 19:30:00 | SETI@home | URL http://setiathome.berkeley.edu/; Computer ID 6245618; resource share 100
17/01/2012 19:30:00 | SETI@home | General prefs: from SETI@home (last modified 16-Jan-2012 19:26:22)
17/01/2012 19:30:00 | SETI@home | Host location: none
17/01/2012 19:30:00 | SETI@home | General prefs: using your defaults
17/01/2012 19:30:00 | | Reading preferences override file
17/01/2012 19:30:00 | | Preferences:
17/01/2012 19:30:00 | | max memory usage when active: 8190.62MB
17/01/2012 19:30:00 | | max memory usage when idle: 14743.12MB
17/01/2012 19:30:00 | | max disk usage: 10.00GB
17/01/2012 19:30:00 | | max CPUs used: 2
17/01/2012 19:30:00 | | max upload rate: 51200 bytes/sec
17/01/2012 19:30:00 | | (to change preferences, visit the web site of an attached project, or select Preferences in the Manager)
17/01/2012 19:30:00 | SETI@home | Task 29ap11ad.7440.13973.4.10.172.vlar_1 is 20.48 days overdue; you may not get credit for it. Consider aborting it.
17/01/2012 19:30:00 | SETI@home | Task 29ap11ad.7440.13973.4.10.169.vlar_1 is 20.48 days overdue; you may not get credit for it. Consider aborting it.
17/01/2012 19:30:00 | SETI@home | Task 29ap11ad.7440.13973.4.10.166.vlar_1 is 20.48 days overdue; you may not get credit for it. Consider aborting it.
17/01/2012 19:30:00 | | Not using a proxy
17/01/2012 19:30:00 | SETI@home | Restarting task 29ap11ad.7440.13973.4.10.172.vlar_1 using setiathome_enhanced version 603
17/01/2012 19:30:00 | SETI@home | Restarting task 29ap11ad.7440.13973.4.10.169.vlar_1 using setiathome_enhanced version 603
17/01/2012 19:35:43 | SETI@home | Computation for task 29ap11ad.7440.13973.4.10.172.vlar_1 finished
17/01/2012 19:35:43 | SETI@home | Restarting task 29ap11ad.7440.13973.4.10.166.vlar_1 using setiathome_enhanced version 603
17/01/2012 19:35:45 | SETI@home | Started upload of 29ap11ad.7440.13973.4.10.172.vlar_1_0
17/01/2012 19:36:00 | SETI@home | Finished upload of 29ap11ad.7440.13973.4.10.172.vlar_1_0
17/01/2012 19:36:00 | SETI@home | Sending scheduler request: To report completed tasks.
17/01/2012 19:36:00 | SETI@home | Reporting 1 completed tasks, not requesting new tasks
17/01/2012 19:36:09 | SETI@home | Scheduler request completed
17/01/2012 19:37:38 | SETI@home | General prefs: from SETI@home (last modified 16-Jan-2012 19:26:22)
17/01/2012 19:37:38 | SETI@home | Host location: none
17/01/2012 19:37:38 | SETI@home | General prefs: using your defaults
17/01/2012 19:37:38 | | Reading preferences override file
17/01/2012 19:37:38 | | Preferences:
17/01/2012 19:37:38 | | max memory usage when active: 8190.62MB
17/01/2012 19:37:38 | | max memory usage when idle: 14743.12MB
17/01/2012 19:37:38 | | max disk usage: 10.00GB
17/01/2012 19:37:38 | | Number of usable CPUs has changed from 2 to 3.
17/01/2012 19:37:38 | | max CPUs used: 3
17/01/2012 19:37:38 | | max upload rate: 51200 bytes/sec
17/01/2012 19:37:38 | | (to change preferences, visit the web site of an attached project, or select Preferences in the Manager)
17/01/2012 19:37:39 | SETI@home | Starting task 25oc11ac.7567.13155.7.10.243_1 using setiathome_enhanced version 603
17/01/2012 19:41:15 | SETI@home | Sending scheduler request: To fetch work.
17/01/2012 19:41:15 | SETI@home | Requesting new tasks for CPU
17/01/2012 19:41:25 | SETI@home | Scheduler request completed: got 0 new tasks
17/01/2012 19:41:25 | SETI@home | Project has no tasks available
17/01/2012 19:51:35 | SETI@home | Sending scheduler request: To fetch work.
17/01/2012 19:51:35 | SETI@home | Requesting new tasks for CPU
17/01/2012 19:52:01 | SETI@home | Scheduler request completed: got 0 new tasks
17/01/2012 19:52:01 | SETI@home | Project has no tasks available
17/01/2012 20:17:12 | SETI@home | Sending scheduler request: To fetch work.
17/01/2012 20:17:12 | SETI@home | Requesting new tasks for CPU
17/01/2012 20:17:30 | SETI@home | Scheduler request completed: got 11 new tasks
17/01/2012 20:17:32 | SETI@home | Started download of 17oc11ab.8350.13973.13.10.87
17/01/2012 20:17:32 | SETI@home | Started download of 17oc11ab.8350.13973.13.10.61
17/01/2012 20:17:59 | SETI@home | Finished download of 17oc11ab.8350.13973.13.10.87
17/01/2012 20:17:59 | SETI@home | Started download of 17oc11ab.8350.13973.13.10.88
17/01/2012 20:18:01 | SETI@home | Temporarily failed download of 17oc11ab.8350.13973.13.10.61: HTTP error
17/01/2012 20:18:01 | SETI@home | Backing off 12 min 44 sec on download of 17oc11ab.8350.13973.13.10.61
17/01/2012 20:18:01 | SETI@home | Started download of 17oc11ab.8350.13973.13.10.93
17/01/2012 20:18:04 | | Project communication failed: attempting access to reference site
17/01/2012 20:18:05 | | Internet access OK - project servers may be temporarily down.
17/01/2012 20:19:01 | SETI@home | Temporarily failed download of 17oc11ab.8350.13973.13.10.93: HTTP error
17/01/2012 20:19:01 | SETI@home | Backing off 18 min 59 sec on download of 17oc11ab.8350.13973.13.10.93
17/01/2012 20:19:01 | SETI@home | Started download of 17oc11ab.8350.13973.13.10.73
17/01/2012 20:19:05 | | Project communication failed: attempting access to reference site
17/01/2012 20:19:07 | | Internet access OK - project servers may be temporarily down.

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Since you have only "Requesting new tasks for CPU" and no CUDA tasks on board ('In progress')
You have to check here:
http://setiathome.berkeley.edu/prefs.php?subset=project

what is the setting for 'Use NVIDIA GPU'

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- ALF - "Find out what you don't do well ..... then don't do it!" :)
 

Thanks, I've updated my preferences. Are there any local preferences I need to check? My computing preferences were to use GPU all the time and Activity was set to use GPU all the time.

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That seems to have solved it, thanks:)

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