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Why do Dell computers have this separate graphics card?

7 minutes ago, dtgq said:

For example, these i5 2400 systems: https://imgur.com/KCMx9nz https://imgur.com/5mCgBBz

 

What's that graphics card for? Why do they have it? Does it actually process graphics on it, or is it just some kind of pass-through for the IGP?

The second one is definitely a discrete video card in a pci-e slot. This first one though without seeing inside the case I can't tell you as it may just be a expansion plug like a USB would do.

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14 minutes ago, dtgq said:

For example, these i5 2400 systems: https://imgur.com/KCMx9nz https://imgur.com/5mCgBBz

 

What's that graphics card for? Why do they have it? Does it actually process graphics on it, or is it just some kind of pass-through for the IGP?

It's less a "separate graphics card", and more just a Quadro GPU with multiple cable/display outs for signs/shops/work displays where you need multiple displays.

 

DELOCK_65403_01.png.767713bb337149985db21a492c917954.png

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The connector on those is DMS-59 https://en.wikipedia.org/wiki/DMS-59   ... it's a special connector slightly wider than DVI with 2 digital and analogue outputs. It was common on workstation cards but also on OEM video cards.

 

Dell probably reused the same OEM motherboard for multiple systems and configurations and as you can see in the back it seems like the motherboard has only HDMI out (1 output) , unless there's more connectors behind the I/O shield plate.

Also, for some systems (CAD, 2D/3D rendering etc) the integrated Intel graphics card may not be good enough (not stable, or not fast enough).

 

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