Z170 Gaming-ITX/ac PCI-e bifurcation

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   Hi,I'm wondering if the Z170 Gaming-ITX/ac supports PCI-e bifurcation of x16 lanes into two PCI-e x8 slots.  The Z170 chipset supports this, but I'm curious if the Asrock implementation does.  If so, using something like this should be possible: 

Edited by jb1 - 20 Aug 2015 at 3:51am

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jb1 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 20 Aug 2015 Status: Offline Points: 13	Post Options Post Reply Quote jb1 Report Post Thanks(0) Quote Reply Topic: Z170 Gaming-ITX/ac PCI-e bifurcation Posted: 20 Aug 2015 at 3:26am
	Hi, I'm wondering if the Z170 Gaming-ITX/ac supports PCI-e bifurcation of x16 lanes into two PCI-e x8 slots. The Z170 chipset supports this, but I'm curious if the Asrock implementation does. If so, using something like this should be possible: Edited by jb1 - 20 Aug 2015 at 3:51am

jb1 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 20 Aug 2015 Status: Offline Points: 13	Post Options Post Reply Quote jb1 Report Post Thanks(0) Quote Reply Posted: 25 Aug 2015 at 1:56am
	Any idea about support for this? I can't seem to find it in the manual.

jb1 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 20 Aug 2015 Status: Offline Points: 13	Post Options Post Reply Quote jb1 Report Post Thanks(0) Quote Reply Posted: 22 Sep 2015 at 10:15pm
	bump

parsec Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 04 May 2015 Location: USA Status: Offline Points: 4996	Post Options Post Reply Quote parsec Report Post Thanks(0) Quote Reply Posted: 22 Sep 2015 at 10:41pm
	Good question. That PCIe device in your picture, is that some type of riser card, or a PCIe x16 lane "splitter" of some sort? A little of both I suspect. I've never had personal experience with what you are asking. Plus I've never seen a forum post besides yours on this topic, sorry to say. I don't know if bifurcation requires a UEFI/BIOS option or not, and if it is enabled outside of the chipset, meaning in control of the mother board. I'll try to find more information on this for you.


Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 25043	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 22 Sep 2015 at 11:50pm
	I know that the ASRock's X99 ITX board supported bifurcation with a BIOS update so I would guess that there must be some setting in the BIOS that allows for this. I don't know however if it would already be present in the Z170 Gaming-ITX/ac's BIOS. I think you may have to wait for ASRock_TSD on this one or alternatively you can create a support ticket and ask tech support directly.

stickman Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 06 Jul 2015 Status: Offline Points: 3	Post Options Post Reply Quote stickman Report Post Thanks(0) Quote Reply Posted: 06 Oct 2015 at 5:23am
	Bump! I asked about this some time ago and ASRock_TSD suggested that some board from the 100 series would have bifurcation support. Is this still true? Or do I have to give up on this?

jb1 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 20 Aug 2015 Status: Offline Points: 13	Post Options Post Reply Quote jb1 Report Post Thanks(0) Quote Reply Posted: 08 Nov 2015 at 2:02am
	Another bump! I don't think the BIOS supports it right now, but Asrock seemed to imply that it might come with a future BIOS update?