HP MS-7826 ver 1.0 Not Detecting Discrete Graphics Card(s)

ThreeDee

[H]F Junkie
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Sep 5, 2001
Messages
11,151
So I had an old HP MS-7826 v1.0 motherboard in my closet .. I added an I7 4770 with 2 x 4GB & 2 x 2GB sticks of DDR3 .. a 128GB mSATA boot drive and installed Windows 10.

The setup is running surprisingly fast and working great .. except for one thing. It won't detect any discrete video cards I install in it .. it has some odd BIOS options where it has some kind of Security "feature" that won't allow the computer to boot if you don't allow a device to be plugged into the various PCIe slots.

I allowed cards/devices to be plugged into every PCIe slot and tried a GTS 450, HD 7850, a couple Quadro cards .. and Windows boots up just fine using the onboard video but no signal from whatever video card that is installed.

In Device manager .. no indication of the video card being installed .. no exclamation points .. no "unknown device" .. only the Intel® HD Graphics 4600 is showing.

The BIOS installed is latest that HP offers going through it's auto detection HP tool thing on their website.

Visually inspecting the PCIe x16 slot ..it looks fine .. no obstructions .. no bent looking contact points .. no burnt marks, or blown caps on the motherboard.

Any help would be much appreciated in getting the setup to "see" an installed video card.. Thanks!

https://support.hp.com/us-en/product/hp-envy-700-000-desktop-pc-series/5358989/document/c03748942
 

pendragon1

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Oct 7, 2000
Messages
26,314
can you tell it which video to use in the bios? pcie cable plugged in? do you have a really crappy card you could try, one without pcie power?
 

ThreeDee

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Sep 5, 2001
Messages
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no option in BIOS to select different video or any kind of video .. used both kinds of video cards .. ones that take pcie power connector and ones that don't. Made extra sure that each card was properly seated.

Generally .. you plug in a video card and it .. generally .. becomes the default video device.. I read online and others are installing different AMD and Nvidia cards on this motherboard without issue ..

I've been going through each of the few BIOS options and toggling them to see if something will magically start using/seeing whatever video card I have installed .. nothing so far.

All the video cards I've been trying work just fine in another older rig that I am putting together (LGA 2011 x79t Chinese knock off motherbaord that was my TrueNAS server for quite awhile)
 

pendragon1

Fully [H]
Joined
Oct 7, 2000
Messages
26,314
no option in BIOS to select different video or any kind of video .. used both kinds of video cards .. ones that take pcie power connector and ones that don't. Made extra sure that each card was properly seated.

Generally .. you plug in a video card and it .. generally .. becomes the default video device.. I read online and others are installing different AMD and Nvidia cards on this motherboard without issue ..

I've been going through each of the few BIOS options and toggling them to see if something will magically start using/seeing whatever video card I have installed .. nothing so far.

All the video cards I've been trying work just fine in another older rig that I am putting together (LGA 2011 x79t Chinese knock off motherbaord that was my TrueNAS server for quite awhile)
try clearing the bios?
 

ThreeDee

[H]F Junkie
Joined
Sep 5, 2001
Messages
11,151
I'll pull the mSATA drive out and see if that's the ticket .. thanks for the idea
 
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