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Help with 4870X2

post #1 of 6
Thread Starter 
Hello all. I have been trying to set up my second machine that has 2 4970X2's in it and no matter what I try, I can't get BOINC to see more than one GPU.

I have tried:
  • A plug in each DVI
  • cc_config.xml (in the right folder: c:\\program data\\boinc)
    • <cc_config>
      <options>
      <use_all_gpus>1</use_all_gpus>
      </options>
      </cc_config>
  • Extending the desktop
  • Duplicating the desktop
  • The trick from F@H where you set "force TV detect"

I've searched google and overclock.net extensively and I can't find any different ideas on what to do to get this working.

Has anyone encountered anything like this? And if so, any fixes that aren't listed above?
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post #2 of 6
you might need to put a monitor on the 2nd card and extend your desktop. i had to do that with my old cards to make it work,\\
    
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post #3 of 6
make sure you are crossfired in ccc and let boinc run I have had it tell me that I have only one card for half a day before. then one pass through it was showing two cards. give it a chance it is ackward sometimes
post #4 of 6
Either crossfire both cards (quadfire) or connect a DIY dummy plug to each card.
  1. Buy some DVI-to-VGA adaptors.
  2. Buy 3x 75ohm rsistors for each dummy dongle needed
  3. Then on the VGA side of each DVI-to-VGA adaptor, connect 3x 75ohm resistors as follows:
  4. You can just bend and push them in, like so (if needed, some hotmelt glue will stop the resistors from falling out):
  5. Or if you want to solder the resistors in place, you can buy some male VGA connector ends from an electronics hobby shop and turn them into the dummy vga dongles instead
  6. Pull them apart and solder the resistors in place and then put them back together:


  7. Then just push the new dummy vga dongles you have made, into the DVI-to-VGA adapters in each card and tighten the screws to hold them in place

Done. All cards will now be visible in Windows and all cards will be available to your BOINC client for crunching
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post #5 of 6
Thread Starter 
As it is I have monitors connected to 3 out of the 4 outputs. But I may try the dummy connections. Nice guide, by the way. Very well done.
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post #6 of 6
So they're not in quadfire?

Are all gpus available/visible in windows?

You might have to go to CCC and enable/configure a desktop on each one (under desktop management) - or possibly even under the winodws display settings and selecting "extend these displays" for any desktop that is not used yet (shaded).
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CoolingCoolingOSMonitor
XSPC DDC Two BayRes BMaverick Laing DDC (MCP350) Windows 7 Ultimate x64 Philips 201B 21" CRT 
MonitorKeyboardPowerCase
ViewSonic VX922 19" LCD Diamond Digital Black Antec True Power 750w Antec LanBoy Air Red 
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Crimson Basilisk
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CPUMotherboardGraphicsGraphics
Intel i7 2600K @ 5.1Ghz AsRock Extreme4 Gen3 Palit GTX 680 Jetstream 2GB Palit GTX 680 Jetstream 2GB 
RAMRAMHard DriveHard Drive
G.Skill F3-12800CL9D-8GBXL G.Skill F3-12800CL9D-8GBXL Sandisk Extreme 120GB SSD Sandisk Extreme 120GB SSD 
Hard DriveOptical DriveCoolingCooling
WD Caviar "Black" 1TB SATAII LG WH14NS40 Blu-ray Burner XSPC Rasa CPU (Acetal) Black RX360 Triple Fan Radiator 
CoolingCoolingOSMonitor
XSPC DDC Two BayRes BMaverick Laing DDC (MCP350) Windows 7 Ultimate x64 Philips 201B 21" CRT 
MonitorKeyboardPowerCase
ViewSonic VX922 19" LCD Diamond Digital Black Antec True Power 750w Antec LanBoy Air Red 
MouseMouse PadAudioOther
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