need motherboard for i7 700k and SLI x16x16 (1080ti)

[Frey]

hello, i need a motherboard with x16x16 for i7 700k, my motherboard has only SLI x8x8

[Bad 💀 Motha]

Messaggio originale di tacoshy:

Messaggio originale di Omega:

x16 isn't going to make any difference over x8. And you are not going to run 2x x16 on z270.

Well I have a Motherboard supporting 32 lanes:

GA-Z270X-Gaming 9

One of the only Z270 Motherboards I know supporting 32 lanes (Through a PLX-PEX 8747)

That's in TOTAL; you realize all those SATA are off the PCIE lanes, yes?
Along with all of the USB 3.xx and LAN as well.
Yea Motherboards are 8X8 only for GPUs.
or 8X8X4 for Tri-Way; but you also have to consult Manual as this kind of config means some devices might be get disable, or will share resources. I've had issues where certain SATA or USB ports were trouble-some due to this kind of config sharing.

You wont get no 16X16 in full unless you go on ThreadRipper or Intel X299/X399 Chipsets

PCIE 3.0 @ X16 is more bandwidth then most single GPUs could ever reach for many Gens to come. In theory X16 is there for 1-2 GPUs as a reserve place-holder away from the rest of the PCIE Lanes; to ensure enough room for 1-2 GPU configs. This is how you know 8X8 is enough.

[tacoshy]

Messaggio originale di Bad_Motha:

Messaggio originale di tacoshy:

Well I have a Motherboard supporting 32 lanes:

GA-Z270X-Gaming 9

One of the only Z270 Motherboards I know supporting 32 lanes (Through a PLX-PEX 8747)

That's in TOTAL; you realize all those SATA are off the PCIE lanes, yes?
Along with all of the USB 3.xx and LAN as well.
Yea Motherboards are 8X8 only for GPUs.
or 8X8X4 for Tri-Way; but you also have to consult Manual as this kind of config means some devices might be get disable, or will share resources. I've had issues where certain SATA or USB ports were trouble-some due to this kind of config sharing.

You wont get no 16X16 in full unless you go on ThreadRipper or Intel X299/X399 Chipsets

PCIE 3.0 @ X16 is more bandwidth then most single GPUs could ever reach for many Gens to come. In theory X16 is there for 1-2 GPUs as a reserve place-holder away from the rest of the PCIE Lanes; to ensure enough room for 1-2 GPU configs. This is how you know 8X8 is enough.

The SATA Ports are already off and Not affected by the PEX. Even what the Manual specifically state. That you can place a GPU where ever you want and that with 2 GPU both will run at 16 lanes. Well lanes to the PEX. The PEX then runs into the chipset like the rest as the SATA ports, and from the chipset to the CPU.

[Bad 💀 Motha]

Well from everything I have read, all the tech sheets and alike; even the hardcore techs say that most Motherboards simply can not handle SLI/CFX properly to it's full effect due to various limits; limits that are not present on Enthusiest Configs like ThreadRipper and Intel X299/X399 as those support much more in the way of PCIE Lanes; now perhaps that is to help accomodate both a 2 - 4 way SLI/CFX config as well as, on-top of all of that also allowing breathing room with Lane Capacity to then also support multiple PCIE driven NVMe M.2 and/or U.2 based Drives

But hopefully I was not confusing anyone with regards to the 16X16 -vs- 8X8
On most Motherboards you should be fine to run say 2x 1080 Ti even @ 8X8 and get their full performance given the Motherboard allows it, your Power Supply is more than enough for all of that, and that you stick to using i7 class of CPU at the very least.
6700K, 7700K, 8700K would be more than capable of being enough CPU while running a config that is utilizing the highest-end-available (to-date) of GPUs such as 2x 1080 Ti / 2x TitanXP / or 2x Vega 56 or 64