Nvidia Gtx Titan don`t run BOINC tasks when using windows 8,
it works find in windows 7
Any suggestions ?

Boinc 7.0.56 (64bit)

Nvidia Gtx Titan don`t run BOINC tasks when using windows 8

That's hardly surprising. BOINC is infrastructure, it doesn't supply any tasks for crunching: that's the job of the project science applications - which you haven't told us about.

Any suggestions ?

Yes. Read When requesting and giving help on these forums..., and think about what information we might need to answer your question. Then post it.

In my computer i have two gpu, one gtx titan and one gtx 680.
When i run primegrid tasks in windows 7, i get works for both gpu`s
In windows 8 only gtx 680 is crunching. primegrid tasks

Post us your startup event-log of W7 and W8, top 40 lines which I'm reasonably sure will be telling enough, but feel free to compare them and wonder what's wrong [missing].

TTYL

---

Coelum Non Animum Mutant, Qui Trans Mare Currunt

User 35589 at Primegrid. Computers hidden. Not possible to help.

If I decide that my pc is visible, will this help?
It appears that I am wrong. It is my bottom card gtx680 not being detected in BOINC

In my computer i have two gpu, one gtx titan and one gtx 680.

Primegrid recognizes the other one as a GTX 670.

Sieve started: 267468591000000000 <= p < 267468600000000000
Thread 0 starting
Detected GPU 1: GeForce GTX 670
Detected compute capability: 3.0
Detected 7 multiprocessors.

But since BOINC apparently recognizes the GPU correctly, it's not really a BOINC problem when the project isn't using it.

Coprocessors	NVIDIA GeForce GTX TITAN (4095MB) driver: 31414

You'll have to complain at the project about that. Start reading in this thread.

---

It appears that I am wrong. It is my bottom card gtx680 not being detected in BOINC

Already asked before, please post the first 20-30 lines of your start up messages. That way we can see what BOINC is doing.

---

Here is my history log fore windows 8:
15.03.2013 21:11:05 | | Starting BOINC client version 7.0.52 for windows_x86_64
15.03.2013 21:11:05 | | log flags: file_xfer, sched_ops, task
15.03.2013 21:11:05 | | Libraries: libcurl/7.25.0 OpenSSL/1.0.1 zlib/1.2.6
15.03.2013 21:11:05 | | Data directory: C:\ProgramData\BOINC
15.03.2013 21:11:05 | | Processor: 12 GenuineIntel Intel(R) Core(TM) i7-3930K CPU @ 3.20GHz [Family 6 Model 45 Stepping 6]
15.03.2013 21:11:05 | | Processor: 256.00 KB cache
15.03.2013 21:11:05 | | 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 cx16 sse4_1 sse4_2 popcnt aes syscall nx lm vmx tm2 dca pbe
15.03.2013 21:11:05 | | OS: Microsoft Windows 8: Professional x64 Edition, (06.02.9200.00)
15.03.2013 21:11:05 | | Memory: 15.94 GB physical, 31.94 GB virtual
15.03.2013 21:11:05 | | Disk: 237.96 GB total, 151.53 GB free
15.03.2013 21:11:05 | | Local time is UTC +1 hours
15.03.2013 21:11:05 | | CUDA: NVIDIA GPU 0: GeForce GTX TITAN (driver version 314.14, CUDA version 5.0, compute capability 3.5, 4096MB, 4096MB available, 4707 GFLOPS peak)
15.03.2013 21:11:05 | | CUDA: NVIDIA GPU 1 (not used): GeForce GTX 680 (driver version 314.14, CUDA version 5.0, compute capability 3.0, 2048MB, 1955MB available, 3252 GFLOPS peak)
15.03.2013 21:11:05 | | OpenCL: NVIDIA GPU 0: GeForce GTX TITAN (driver version 314.14, device version OpenCL 1.1 CUDA, 6144MB, 4096MB available, 4707 GFLOPS peak)
15.03.2013 21:11:05 | | OpenCL: NVIDIA GPU 1 (not used): GeForce GTX 680 (driver version 314.14, device version OpenCL 1.1 CUDA, 2048MB, 1955MB available, 3252 GFLOPS peak)
15.03.2013 21:11:05 | | Config: don't compute while Origin.exe is running
15.03.2013 21:11:05 | PrimeGrid | URL http://www.primegrid.com/; Computer ID 372790; resource share 1
15.03.2013 21:11:05 | PrimeGrid | General prefs: from PrimeGrid (last modified 22-Feb-2013 12:10:10)
15.03.2013 21:11:05 | PrimeGrid | Host location: none
15.03.2013 21:11:05 | PrimeGrid | General prefs: using your defaults
15.03.2013 21:11:05 | | Reading preferences override file
15.03.2013 21:11:05 | | Preferences:
15.03.2013 21:11:05 | | max memory usage when active: 16326.82MB
15.03.2013 21:11:05 | | max memory usage when idle: 16326.82MB
15.03.2013 21:11:05 | | max disk usage: 100.00GB
15.03.2013 21:11:05 | | (to change preferences, visit a project web site or select Preferences in the Manager)
15.03.2013 21:11:05 | | Not using a proxy
15.03.2013 21:11:05 | PrimeGrid | Restarting task pps_sr2sieve_59960785_0 using pps_sr2sieve version 139 (cuda23) in slot 0
15.03.2013 21:11:16 | PrimeGrid | General prefs: from PrimeGrid (last modified 22-Feb-2013 12:10:10)
15.03.2013 21:11:16 | PrimeGrid | Host location: none
15.03.2013 21:11:16 | PrimeGrid | General prefs: using your defaults
15.03.2013 21:11:16 | | Reading preferences override file
15.03.2013 21:11:16 | | Preferences:
15.03.2013 21:11:16 | | max memory usage when active: 16326.82MB
15.03.2013 21:11:16 | | max memory usage when idle: 16326.82MB
15.03.2013 21:11:16 | | max disk usage: 100.00GB
15.03.2013 21:11:16 | | (to change preferences, visit a project web site or select Preferences in the Manager)

In my computer i have two gpu, one gtx titan and one gtx 680.

Primegrid recognizes the other one as a GTX 670.

Sieve started: 267468591000000000 <= p < 267468600000000000
Thread 0 starting
Detected GPU 1: GeForce GTX 670
Detected compute capability: 3.0
Detected 7 multiprocessors.

But since BOINC apparently recognizes the GPU correctly, it's not really a BOINC problem when the project isn't using it.

Coprocessors	NVIDIA GeForce GTX TITAN (4095MB) driver: 31414

You'll have to complain at the project about that. Start reading in this thread.

Hi!
I had two gtx670 in this computer earlier, and have now remove them to another computer..

Just maybe you might be needing the cc_config option (if not already in place).

<use_all_gpus>1</use_all_gpus>
If 1, use all GPUs (otherwise only the most capable ones are used). List-add.pngNew in 6.6.25

1 is on, 0 is off.

---

Coelum Non Animum Mutant, Qui Trans Mare Currunt

Thanks for your help, it worked :)