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Using Intel and Nvidia simultaneously?

post #1 of 6
Thread Starter 
Problem: BOINC is hit-or-miss when it comes to GPU tasks bogging down the system
Solution: Dedicate a weak GPU to office-y/web browse-y work and dedicate the "strong" GPU to BOINC
Implementation: Connect Nvidia card to monitor's DVI port and Intel iGPU to monitor's HDMI port; use the monitor itself to switch video feeds

Problem 2: Intel iGPU isn't detected as a display adapter
Problem 3: HDMI feed is totally blank

Any solutions for this? I want to be able to swap to a gaming card with a single button press. I would assume that I would mirror the 1080p display on the two cards. That way, the active GPU is actually rendering an image while the inactive GPU is technically doing so as well, but the fruits of its labors are not seen.
Edited by CynicalUnicorn - 10/17/14 at 5:22pm
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post #2 of 6
This is possible if there is an option in the uefi regarding the internal GPU set to always enabled.
The default is that if there is a dedicated card, than the internal GPU is on disable mode.

If what in your signature is what you have, its in the uefi under advanced->chipset configuration->igpu multi-monitor. Set it to enable to achieve both of them being active. Default is disabled.
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post #3 of 6
Thread Starter 
Yeah, it's that system. Which GPU should be the primary display driver? If it's onboard, the Nvidia card is recognized in device manager but totally unused; Nvidia Control Panel won't even launch. If it's PCIe, then the iGPU isn't recognized, but it's definitely working since the system memory drops from 16GB to 15GB.
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post #4 of 6
I think I understand your problem.
You need to connect dedicated monitors to each card.
When making it enabled it makes each GPU operate once a monitor is connected to it.
It could be that if you connect both GPUs to the same monitor, the monitor doesn't "dual operate" but shut off the connection you are not correctly viewing. This is why you get either one to operate but can't seem to get them both at the same time every time you restart your system using a different output connection.

I'm sorry but this is all I can think of. I had a similar issue when I the computer did not recognise a monitor which was active on another computer's output. Once switched back it suddenly work up the display.
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post #5 of 6
Thread Starter 
Also tried rebooting with a DVI-HDMI cable to one monitor (works fine on the two systems with which it has been used) from the iGPU and a DVI-DVI cable to the other from the dGPU. With the onboard graphics as the primary display driver, the Nvidia-rendered display doesn't exist in Windows. With the PCIe graphics as the primary display driver, the Intel-rendered display doesn't exist in Windows. doh.gif Given that the integrated P4600 can't even smoothly render the non-Aero desktop or Firefox with 1GB of 128-bit "VRAM" at 800MHz and the L4 cache in the CPU itself, I'm going to say that this is for the better.

Let's hope my experience with a hybrid AMD-Nvidia system goes better. I'm getting a 970 once they start going on sale and am looking at a Tonga GPU as well. Mostly for lulz, of course, since SLI would be the better option in almost all cases.
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post #6 of 6
You need two displays at startup, ( I use my 32" HDTV for the igpu ) and then all is well....

I ran Einstein on the igpu, Cosmology on the CPU and Milkyway on my HD 5870.

HTH

dunx
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