Sidebar Sidebar
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

AMD Discussion

I think maybe an X370 motherboard would work for non-GPU.

They have at most two 3.0 slots.

But while they advertise x8/x8, I'm not sure if they would support x4/x4 with Bristol.
 
The specs of one motherboard only state x8/x0 for Bristol :(

The specs of one motherboard state it supports 3-way CrossFireX x8/x4/x4, but it only has two 3.0 slots, and there's no mention of this mode in the manual.

There's no x8/x8 or x8/x4/x4 B350 boards even if the chipset is supposed to support CrossFire.
 
The x8x4x4, I'm guessing would be Bristol plus two GPU's. But I don't think you can crossfire that way can you? I do know that the x370 boards are the boards that are marketed as enthusiasts multi GPU boards.
 
xsmi123 said:
The x8x4x4, I'm guessing would be Bristol plus two GPU's. But I don't think you can crossfire that way can you? I do know that the x370 boards are the boards that are marketed as enthusiasts multi GPU boards.
Click to expand...
If you use Athlon, it would be 3 cards.

But Bristol would be able of maximum x4/x2/x2 theoretically.

But I am not interested in CrossFire, just that 2 other slots besides the GPU can be used in 3.0 mode, without using up the M.2 lanes.

BTW, with Bristol, the M.2 is x2.

So, in x4/x4 mode, you could run an SSD faster.
 
I found several MSI B350 motherboards which should support CrossFire 3.0 x8/x8 with Ryzen.

None in the other brands.
 
xsmi123 said:
Looks like plenty of the x370 boards will offer the slots you need.
Click to expand...
I wanted a cheaper board.

And the two MSI that I checked don't look good (the manual shows one 3.0 slot and the x1 must be empty to use CrossFire)

Anyway, not great boards, only 4 SATA ports, only two with Gen2, and there you have to choose between SPDIF or 7.1+RAID.

Even with X370, only two 3.0 slots from the GPU lanes is skimpy.
 
Last edited:
Right. Thats one of the shortcomings of the Ryzen platform on the whole. I feel they should have provided more PCIe lanes from 6 and 8 core procs.
 
Are there x16 PLX that can switch both x16 to x8/x8 and x8 to x4/x4 ?

Or even better, all of x8/x8, x4/x4, x8/x4/x4, x4/x2/x2 ?

I guess it's no problem to even go x8/x4/x2/x2, x4/x2/x1/x1, x8/x4/x2/x1/x1, x4/x1/x1/x1/x1.

And you can even sell a taller board for the 2.0 ports.

It seems like motherboard vendor shortsightedness.
 
Last edited:
I think understand what the MSI specs meant now.

Gen3(16,8) meant x16 with Ryzen and x8 with Bristol, not one x16 slot plus one x8 slot.
 
cube said:
Are there x16 PLX that can switch both x16 to x8/x8 and x8 to x4/x4 ?

Or even better, all of x8/x8, x4/x4, x8/x4/x4, x4/x2/x2 ?

I guess it's no problem to even go x8/x4/x2/x2, x4/x2/x1/x1, x8/x4/x2/x1/x1, x4/x1/x1/x1/x1.

And you can even sell a taller board for the 2.0 ports.

It seems like motherboard vendor shortsightedness.
Click to expand...
PLX switches are very flexible - a good overview is at http://www.anandtech.com/show/9245/avago-announces-plx-pex9700-series-pcie-switches . The port/lane assignments are configurable.

Slide14_575px[1].JPG
 
I don't think you even need one of these switches for x16 to x16, but for x16 to x32.
 
Last edited:
xsmi123 said:
Right. Thats one of the shortcomings of the Ryzen platform on the whole. I feel they should have provided more PCIe lanes from 6 and 8 core procs.
Click to expand...
that would needed an different socket also they seem to reworking on an high end cpu / server chip with more pci-e as well the 128 pci-e dual or single cpu server systems
[doublepost=1492709818][/doublepost]
AidenShaw said:
PLX switches are very flexible - a good overview is at http://www.anandtech.com/show/9245/avago-announces-plx-pex9700-series-pcie-switches . The port/lane assignments are configurable.

View attachment 696902
Click to expand...
spanning tree safe?
 
xsmi123 said:
PLX Motherboards are kind of expensive. I just bought my son one for his 7700K system.
Click to expand...
Sorry, but are you surprised that high-end motherboards are kind of expensive?

And do you think that the price of the motherboard was due solely to the PLX chip, or maybe to the motherboard's support for quad SLI on four x16 slots?

The MP6,1 has a PLX PCIe switch embedded in it. And I see people say that the MP6,1 is competitively priced. ;)

P9X79-E%20WS%20BoxBoard_678x452[1].png
 
Last edited:
This userbenchmark site not only has always appeared biased in favor in Intel and NVIDIA, but their "market share" numbers do not seem reliable (some moving around on reload, dubious Ryzen 1700 drop).
 
It also looks like the voting system has kind of stalled in the last weeks.

Do not look for an "about us" page. It has never been there.
 
You must log in or register to reply here.
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.
Top Bottom
Back