Is there a socket 1151 motherboard that supports a total of 24 PCIe lanes? Does bigfoot exist?

IcoNyx

Commendable
Dec 2, 2016
2
0
1,510
It's time to build me a new PC and I've run into a roadblock... I already have a case, some hard drives, monitors, cables, I/O peripherals, Optical drives, etc, so up front all I'm looking to get is the big 5: motherboard, processor, memory, video card, and powersupply.

Easy start, right?

Nope! Long ago, I learned the overwhelming power of hardware RAID... so naturally I'm running all of my hard drives through this little beastie!

That, good sirs, is an Areca arc-1883i SAS RAID controller with in-built hardware encryption (DARPA level encryption I might add), 8 gigs of cache (complete with a battery backup), Network management, and external JBOD support!

Before you ask, no this is NOT a server environment, this is my home PC. most of the hardware in this build is modest because that raid controller attached to a batch of cheep/low capacity SSDs can (and regularly does) out perform the best m.2 drives on the market... even in raid zero!!!

and herein is my problem... I know the Z150 chipset supports 20 lanes aside from the 16 lanes supported by the proc, but is there an LGA 1151 motherboard out there that actually separates these lanes out between PCIe ports? In other words, is there motherboard out there that will allow me to run my Video card at x16 and my raid controller at x8?

...or am I just going to have to go back to Haswell procs and x99 Chipsets (which support 40 lanes)?
 

IcoNyx

Commendable
Dec 2, 2016
2
0
1,510


I've been bitten by Asus and their PLX chips before... but I'm willing to give 'em another shot if I can get a second motion from the gallery.

As for the Gigabyte gaming boards, I looked at them already, they all have the same little disclaimer, "* The PCIEX8 slot shares bandwidth with the PCIEX16 slot. When the PCIEX8 slot is populated, the PCIEX16 slot operates at up to x8 mode" (pulled from newegg, but the OEM website says prety much the same thing)...

Going back to my question, this link here has a discussion on the use of some DMI trickery (EDIT: PCH Trickery to be more acurate) in the Z170 allowing for x16 from the proc and a seperate x20 from the chipset... I was curious if anyone knew of a board that actually takes advantage of it... the Asus LOOKS like it may be doing exactly that, but again, I've been bitten by Asus's PLX implementation in the past...


EDIT: I should be specific on what trouble I had with ASUS PLX implementation... on the Asus x99-eWS multiple video cards played nice, a single video card and the areca arc-1220 I was using at the time worked fine. when I used multiple video cards and the raid controller I had drives regularly drop offline, widespread data corruption, and the encryption tools I used had a nasty habit of "forgetting" their crypto keys!

Good thing I'm a paranoid data hoarder who abuses the crap out of rsync!