Multi-monitors by mixing Intel HD Graphics 3000 with a discrete card?

Brian_R170

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Jun 24, 2014
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My wife wants to have 3 1920x1200 monitors on her home-business computer. The system is a i7-2600K with DH67GDB3 motherboard running Win7. It's currently running 2 1920x1200 monitors on Intel HD Graphics 3000. Intel's website says the HD 3000 supports only 2 monitors and I have confirmed that I can get only 2 out of the 3 video port connectors on the motherboard to work simultaneously.

I'm not opposed to installing a discrete GPU and disabling the HD 3000, but unfortunately, the monitors are digital-only (no VGA) and the case accepts only low-profile cards (single or double-slot). I've scoured the internet looking for a low-profile card that has 3 digital outputs (any combination of displayport, DVI, and HDMI) with little success. I found only two such cards (Sapphire Flex Radeon 6450 and Visontek SFF Radeon 7750), and both had mixed reviews.

What I'm wondering is if I can get away with enabling both HD 3000 and a relatively low-end discrete card to drive different displays in Win7. Graphics performance isn't a concern, but reliability and downtime are. I can't have this computer torn apart for more than a couple hours and I can't end up with a system that has BSODs or a monitor that won't wake up from sleep, etc. I've never tried mixing graphics vendors in the same machine and I've read a few mixed reports. If it's doable, I'd like to go with a GeForce GT 730 + HD 3000, but if mixing vendors is too risky, then I'd go for the Visiontek 7750, unless somebody knows of a better card that fits the bill.

Note that using different monitors isn't an option (yet) and moving the components to a case that supports full-height cards is a last resort due to the extra downtime.

Edit: forgot to mention there are no PCIe graphics power connectors in the box, either, but none of the low-profile cards seem to need them, anyway.

Advice appreciated.
 
Solution
I've been using my 2500k (hd 3000) with my 560ti since day 1. Never had a single issue. I've also had a 6570 in there too. Still none. Before you do, go into the bios and make sure there is the option, it is called igpx multi monitor on most mobos. Since it's intel's feature, they should call it by the name they gave it. Some mobos will just have an igpu enable/disable option.
I've been using my 2500k (hd 3000) with my 560ti since day 1. Never had a single issue. I've also had a 6570 in there too. Still none. Before you do, go into the bios and make sure there is the option, it is called igpx multi monitor on most mobos. Since it's intel's feature, they should call it by the name they gave it. Some mobos will just have an igpu enable/disable option.
 
Solution

Brian_R170

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Jun 24, 2014
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There are 2 related BIOS settings.

"Primary Video Adapter" where options are Integrated Graphics, Ext PCIe, or Ext PCI

"Integrated Graphics Device" where the options are Enable if Primary, Enable, or Disable.

Looks like I would have to go with Ext PCIe + Enable, or Internal Graphics + Enable/Enable if Primary.

I'm inclined to start with Ext PCIe + Enable route unless somebody thinks it should be the other way around.
 

Brian_R170

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Jun 24, 2014
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Thanks k1114, I got a fanless EVGA GeForce GT 720 2GB for under $50 and the whole installation took less than 15 minutes including the Nvidia driver installation. I only remember reading/hearing about problems when people tried mixing graphics vendor setups ~5 years ago and I just can't afford to experiment on this particular computer.