My computer has 2 GPUs:

1. AMD RADEON R9 270X (Primary & attached to the display)
2. NVIDIA GeForce GTX 750 Ti

As of now, whenever I run an exclusive application, both the GPUs will be suspended as configured in the BOINC client.

My requirement is, I want only the AMD GPU to be suspended while the NVIDIA GPU continues to crunch whenever an exclusive application is launched.

Please advice with the configuration.

Thank you.

------------BOINC Log--------------

11/22/2014 12:21:10 PM | | Starting BOINC client version 7.4.27 for windows_x86_64
11/22/2014 12:21:10 PM | | log flags: file_xfer, sched_ops, task
11/22/2014 12:21:10 PM | | Libraries: libcurl/7.33.0 OpenSSL/1.0.1h zlib/1.2.8
11/22/2014 12:21:10 PM | | Data directory: C:\ProgramData\BOINC
11/22/2014 12:21:10 PM | | Running under account Sharath Chandramouli
11/22/2014 12:21:10 PM | | CUDA: NVIDIA GPU 0: GeForce GTX 750 Ti (driver version 344.75, CUDA version 6.5, compute capability 5.0, 2048MB, 1943MB available, 1472 GFLOPS peak)
11/22/2014 12:21:10 PM | | CAL: ATI GPU 0: AMD Radeon HD 7850/7870 series (Pitcairn) (CAL version 1.4.1848, 2048MB, 2008MB available, 6848 GFLOPS peak)
11/22/2014 12:21:10 PM | | OpenCL: NVIDIA GPU 0: GeForce GTX 750 Ti (driver version 344.75, device version OpenCL 1.1 CUDA, 2048MB, 1943MB available, 1472 GFLOPS peak)
11/22/2014 12:21:10 PM | | OpenCL: AMD/ATI GPU 0: AMD Radeon HD 7850/7870 series (Pitcairn) (driver version 1573.4 (VM), device version OpenCL 1.2 AMD-APP (1573.4), 2048MB, 2008MB available, 6848 GFLOPS peak)
11/22/2014 12:21:10 PM | | OpenCL CPU: Intel(R) Pentium(R) CPU G2020 @ 2.90GHz (OpenCL driver vendor: Advanced Micro Devices, Inc., driver version 1573.4 (sse2), device version OpenCL 1.2 AMD-APP (1573.4))
11/22/2014 12:21:10 PM | | Host name: SHARATH-PC2
11/22/2014 12:21:10 PM | | Processor: 2 GenuineIntel Intel(R) Pentium(R) CPU G2020 @ 2.90GHz [Family 6 Model 58 Stepping 9]
11/22/2014 12:21:10 PM | | 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 syscall nx lm vmx tm2 pbe fsgsbase smep
11/22/2014 12:21:10 PM | | OS: Microsoft Windows 8.1: Professional x64 Edition, (06.03.9600.00)
11/22/2014 12:21:10 PM | | Memory: 3.95 GB physical, 5.32 GB virtual
11/22/2014 12:21:10 PM | | Disk: 55.55 GB total, 26.49 GB free
11/22/2014 12:21:10 PM | | Local time is UTC -8 hours
11/22/2014 12:21:10 PM | | Config: don't compute while [my_ex_app] is running

That's not possible through BOINC (Manager), although you ought to be able to get it done via scripting boinccmd commands to reread the cc_config.xml file, and e.g. the use of the <exclude_gpu> option in that cc_config.xml file

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