Can MST get you past the 4 head limit?

Graphics / Linux Linux
1

Probably a question for devs as I doubt others have tested/know.

On newer kepler cards the cards have a 4 head limit vs the old (2 head) limit:

(II) Feb 07 15:20:20 NVIDIA(0): NVIDIA GPU GeForce GTX 670 (GK104) at PCI:5:0:0 (GPU-0)
(II) Feb 07 15:20:20 NVIDIA(0): GPU UUID: GPU-374678af-9904-3073-1bb1-bef3d9d6b286
(–) Feb 07 15:20:20 NVIDIA(0): Memory: 4194304 kBytes
(II) Feb 07 15:20:20 NVIDIA(0): Board ID: 0xe113
(II) Feb 07 15:20:20 NVIDIA(0): Chip SKU: 325
(II) Feb 07 15:20:20 NVIDIA(0): Chip SKU Mod: 0
(II) Feb 07 15:20:20 NVIDIA(0): Project: 2004
(II) Feb 07 15:20:20 NVIDIA(0): Project SKU: 0005
(II) Feb 07 15:20:20 NVIDIA(0): GPU RAM Type: GDDR5
(–) Feb 07 15:20:20 NVIDIA(0): VideoBIOS: 80.04.5c.00.71
(–) Feb 07 15:20:20 NVIDIA(0): Found 4 heads on board

So the question is… I know when MST is enabled instead of being DFP1,DFP-2 they are DFP1.x, DFP-1.x. So does MST make it only count as one head? I assume no but I wanted to check.

2

No, I’m afraid not. The number of different images the GPU can display simultaneously is controlled by the number of heads, and that’s independent of whether MST is in use or not. So you can plug in a large number of monitors in an MST topology but you can still drive a maximum of four total.