Couple of questions. First off, how do you enable the usage of the integrated Intel GPU when you already have a dedicated GPU, and secondly, is it possible to assign the iGPU to only one project?

For example, my GTX 770 is currently working on GPUGRID, and Collatz is one of three projects that support the Intel GPU. I don't want Collatz to use my 770, since the iGPU can't run on GPUGRID.

Hopefully that makes sense.

The solution is to extend the desktop onto the HD4000 (you can try a monitor or a dummy plug, but some have said that is not always 100% reliable),

To extend the desktop (assuming Win 7), right click on the desktop, choose 'screen resolution', on the 'screen resolution'/'change the appearance of your display' screen hit the 'Detect' button,
now click on each of the not detected displays until you get to the HD4000, now set the 'multiple displays' selection to 'try and connect anyway on: VGA', click apply,
now on 'multiple displays' select 'extend these displays', then restart Boinc.

To stop Boinc asking for work for the Nvidia GPU at Collatz go into the Collatz project preferences and Deselect 'Use Nvidia GPU', do a project update (with NNT already set), after that Boinc won't ask for Nvidia work.
(you have four different venues available to use, so you can tailor different sets of preferences to different hosts)

Claggy

The solution is to extend the desktop onto the HD4000 (you can try a monitor or a dummy plug, but some have said that is not always 100% reliable),

To extend the desktop (assuming Win 7), right click on the desktop, choose 'screen resolution', on the 'screen resolution'/'change the appearance of your display' screen hit the 'Detect' button,
now click on each of the not detected displays until you get to the HD4000, now set the 'multiple displays' selection to 'try and connect anyway on: VGA', click apply,
now on 'multiple displays' select 'extend these displays', then restart Boinc.

Nothing happens when I click the detect button. I have three monitors all connected to my video card, but my motherboard does not have a display port of any kind on it.

To stop Boinc asking for work for the Nvidia GPU at Collatz go into the Collatz project preferences and Deselect 'Use Nvidia GPU', do a project update (with NNT already set), after that Boinc won't ask for Nvidia work.
(you have four different venues available to use, so you can tailor different sets of preferences to different hosts)

Done. I'm guessing since I have an issue with the first part of this, it explains why I'm not receiving any work units at the moment.

If I remember correctly, you need to modify something in the config files to actually get it to work.

Nothing happens when I click the detect button. I have three monitors all connected to my video card, but my motherboard does not have a display port of any kind on it.

What is your CPU? Can you post the Boinc startup from the Event Log please.

Claggy

Not sure what in particular you need from the event log, so here's everything: http://pastebin.com/nBaBwuu0

CPU is a i5 2500K. Just double checked and its actually HD 3000, not 4000, but I recall that working as well.

Only Ivy Bridge type CPUs and upwards from there have OpenCL support on the built-in GPU, yours is a Sandy Bridge which does not have OpenCL support. Only HD Graphics 2500 and 4xx0 do so far. The 2000 and 3000 are both earlier and do not do OpenCL, only video.

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Not sure what in particular you need from the event log, so here's everything: http://pastebin.com/nBaBwuu0

CPU is a i5 2500K. Just double checked and its actually HD 3000, not 4000, but I recall that working as well.

That didn't include the Boinc startup, so it was a waste, it would have told me your OS, your Boinc version, what GPUs you were running, if you had Intel GPU drivers installed, it would have displayed Intel OpenCL support for the CPU,
it would have told me your host id's at a few projects, and from that I might be able to see from an application's output whether it detected any other OpenCL devices, that Boinc somehow missed.

Here's a timely reminder, again, for what info we're asking for: http://boinc.berkeley.edu/dev/forum_thread.php?id=8600#50407

Anyway the answer is simple, An IvyBridge CPU is the minimum requirement, SandyBridge CPUs don't have an OpenCL capable GPU:

http://www.intel.com/support/graphics/sb/CS-033757.htm?wapkw=opencl

You can paste the startup here, for instance here's my i7-2600K startup, note there is no Intel OpenCL capable GPU here either:

07/03/2014 17:07:05 |  | Starting BOINC client version 7.2.42 for windows_x86_64
07/03/2014 17:07:05 |  | log flags: file_xfer, sched_ops, task, coproc_debug, cpu_sched, dcf_debug
07/03/2014 17:07:05 |  | log flags: sched_op_debug
07/03/2014 17:07:05 |  | Libraries: libcurl/7.25.0 OpenSSL/1.0.1 zlib/1.2.6
07/03/2014 17:07:05 |  | Data directory: C:\ProgramData\BOINC
07/03/2014 17:07:05 |  | Running under account Claggy
07/03/2014 17:07:05 |  | CAL: ATI GPU 0: AMD Radeon HD 7700 series (Capeverde) (CAL version 1.4.1848, 1024MB, 984MB available, 3584 GFLOPS peak)
07/03/2014 17:07:05 |  | OpenCL: AMD/ATI GPU 0: AMD Radeon HD 7700 series (Capeverde) (driver version 1348.5 (VM), device version OpenCL 1.2 AMD-APP (1348.5), 1024MB, 984MB available, 3584 GFLOPS peak)
07/03/2014 17:07:05 |  | OpenCL CPU: Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz (OpenCL driver vendor: Advanced Micro Devices, Inc., driver version 1348.5 (sse2,avx), device version OpenCL 1.2 AMD-APP (1348.5))
07/03/2014 17:07:05 |  | No NVIDIA library found
07/03/2014 17:07:05 | SETI@home | Found app_info.xml; using anonymous platform
07/03/2014 17:07:05 |  | Host name: P8Z68-V-Pro
07/03/2014 17:07:05 |  | Processor: 8 GenuineIntel        Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz [Family 6 Model 42 Stepping 7]
07/03/2014 17:07:05 |  | 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 pbe
07/03/2014 17:07:05 |  | OS: Microsoft Windows 7: Home Premium x64 Edition, Service Pack 1, (06.01.7601.00)
07/03/2014 17:07:05 |  | Memory: 7.98 GB physical, 15.95 GB virtual
07/03/2014 17:07:05 |  | Disk: 1.82 TB total, 1.52 TB free
07/03/2014 17:07:05 |  | Local time is UTC +0 hours
07/03/2014 17:07:05 |  | Config: use all coprocessors
07/03/2014 17:07:05 |  | Config: GUI RPCs allowed from:
07/03/2014 17:07:05 | Albert@Home | URL http://albert.phys.uwm.edu/; Computer ID 8143; resource share 100
07/03/2014 17:07:05 | Collatz Conjecture | URL http://boinc.thesonntags.com/collatz/; Computer ID 20542; resource share 10
07/03/2014 17:07:05 | climateprediction.net | URL http://climateprediction.net/; Computer ID 1065924; resource share 20
07/03/2014 17:07:05 | Einstein@Home | URL http://einstein.phys.uwm.edu/; Computer ID 2542754; resource share 20
07/03/2014 17:07:05 | LHC@home 1.0 | URL http://lhcathomeclassic.cern.ch/sixtrack/; Computer ID 9967306; resource share 10
07/03/2014 17:07:05 | orbit@home | URL http://orbit.psi.edu/oah/; Computer ID 73849; resource share 10
07/03/2014 17:07:05 | Radioactive@Home | URL http://radioactiveathome.org/boinc/; Computer ID 5875; resource share 100
07/03/2014 17:07:05 | SETI@home | URL http://setiathome.berkeley.edu/; Computer ID 5427475; resource share 100
07/03/2014 17:07:05 | SETI@home Beta Test | URL http://setiweb.ssl.berkeley.edu/beta/; Computer ID 45274; resource share 100
07/03/2014 17:07:05 | PrimeGrid | URL http://www.primegrid.com/; Computer ID 224144; resource share 30
07/03/2014 17:07:05 | SETI@home | General prefs: from SETI@home (last modified 30-Dec-2013 00:28:55)
07/03/2014 17:07:05 | SETI@home | Computer location: work
07/03/2014 17:07:05 |  | General prefs: using separate prefs for work
07/03/2014 17:07:05 |  | Reading preferences override file
07/03/2014 17:07:05 |  | Preferences:
07/03/2014 17:07:05 |  | max memory usage when active: 6126.45MB
07/03/2014 17:07:05 |  | max memory usage when idle: 7351.74MB
07/03/2014 17:07:05 |  | max disk usage: 100.00GB
07/03/2014 17:07:05 |  | max CPUs used: 4
07/03/2014 17:07:05 |  | (to change preferences, visit a project web site or select Preferences in the Manager)
07/03/2014 17:07:05 |  | Using proxy info from GUI
07/03/2014 17:07:05 |  | Not using a proxy

Claggy

Only Ivy Bridge type CPUs and upwards from there have OpenCL support on the built-in GPU, yours is a Sandy Bridge which does not have OpenCL support. Only HD Graphics 2500 and 4xx0 do so far. The 2000 and 3000 are both earlier and do not do OpenCL, only video.

Damn. Guess I'll remove the project, then.

I assume there's absolutely nothing I can do with this GPU, then?