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PCIe Lane Count Inquiry

gerneio
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Basically yes to most stuff.

 

Indeed, this motherboard supports SLI (two Gen 3 PCIE 8x slots) + another Gen 2 4x PCIE device. The additional PCI lanes come from the chipset.

According to the manual, with this setup you can add an additional M.2 PCIE SSD.

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Need someone to help verify something for me really quick. On a motherboard like this, it is my understanding that, when paired with a Ryzen CPU, the two PCIe x16 slots (PCIE_2, PCIE_4) will operate in x8/x8 mode and the last PCIe x16 slot (PCIE_6) will operate in x4 mode, if all are used/filled simultaneously, giving me an overall x8/x8/x4 mode. Is my understanding correct?

 

I'm questioning this because I plan to fill two slots with Nvidia Graphics cards in SLI and the last one with a 10GBE NIC. Currently I have a 4790K paired with a Asrock Fatal1ty Z97X Killer that operates in x8/x4/x4 when all x16 slots are used, which means that SLI does not work due to Nvidia SLI requiring (bullet #1) each card to have at least a x8 mode.

 

Can anyone confirm the above lane operation modes for the AMD board? And if it will work in x8/x8/x4, how exactly? From my understanding the Ryzen CPUs have 16 PCIe lanes (I'm interested in the 1600X), so does the remaining come from the chipset? And if that's the case, do you lose some other functionality (ex. M.2 etc).

 

HB

Gerneio

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Basically yes to most stuff.

 

Indeed, this motherboard supports SLI (two Gen 3 PCIE 8x slots) + another Gen 2 4x PCIE device. The additional PCI lanes come from the chipset.

According to the manual, with this setup you can add an additional M.2 PCIE SSD.

"We're all in this together, might as well be friends" Tom, Toonami.

 

mini eLiXiVy: my open source 65% mechanical PCB, a build log, PCB anatomy and discussing open source licenses: https://linustechtips.com/topic/1366493-elixivy-a-65-mechanical-keyboard-build-log-pcb-anatomy-and-how-i-open-sourced-this-project/

 

mini_cardboard: a 4% keyboard build log and how keyboards work: https://linustechtips.com/topic/1328547-mini_cardboard-a-4-keyboard-build-log-and-how-keyboards-work/

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20 minutes ago, gerneio said:

Need someone to help verify something for me really quick. On a motherboard like this, it is my understanding that, when paired with a Ryzen CPU, the two PCIe x16 slots (PCIE_2, PCIE_4) will operate in x8/x8 mode and the last PCIe x16 slot (PCIE_6) will operate in x4 mode, if all are used/filled simultaneously, giving me an overall x8/x8/x4 mode. Is my understanding correct?

 

I'm questioning this because I plan to fill two slots with Nvidia Graphics cards in SLI and the last one with a 10GBE NIC. Currently I have a 4790K paired with a Asrock Fatal1ty Z97X Killer that operates in x8/x4/x4 when all x16 slots are used, which means that SLI does not work due to Nvidia SLI requiring (bullet #1) each card to have at least a x8 mode.

 

Can anyone confirm the above lane operation modes for the AMD board? And if it will work in x8/x8/x4, how exactly? From my understanding the Ryzen CPUs have 16 PCIe lanes (I'm interested in the 1600X), so does the remaining come from the chipset? And if that's the case, do you lose some other functionality (ex. M.2 etc).

 

HB

Ryzen CPUs have 20 free lanes, AMD states 4 of them are reserved for an M.2 slot but I don't know how strict of a requirement that is.

 

In this case it doesn't matter though, given that the bottom slot is "Gen2 x4" that automatically means the lanes for the bottom slot are provided by the chipset, not the CPU. So total 16 CPU lanes are used for PCIe slots (the first two slots, x16 or x8/x8), and the last 4 CPU lanes are used for the M.2 SSD. Then 4 lanes from the chipset are used for the bottom x4 PCIe slot.

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On 1/18/2018 at 3:36 PM, Damascus said:

Kewl, as stated above you should be fine.

Boom, there you have it! 1600X plus Asus Prime x370 Pro for $320 out the door at my local micro center. Good deal!

 

Time to figure out the DDR4 situation...

E56C6A8C-1E20-425D-B4C4-C0E6C89CB0FD.jpeg

Gerneio

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6 minutes ago, Damascus said:

I'd probably be willing to sell ya 2x8gb tridentz rgb for 200 + shippng

I’ll have to follow up with you at a later time for that one. I think I may have something figured out in the mean time. I found this guy selling nearly an entire Ryzen 1600 build, only missing GPU and storage, with 16 GB Corsair Vengeance RAM. The resale value of all the other parts, except the ram, will actually nearly pay for the ram itself. Sooo hopefully that pans out. But if it don’t then I’m gonna try this potentially cheap route first.

Gerneio

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1 hour ago, Damascus said:

I'd probably be willing to sell ya 2x8gb tridentz rgb for 200 + shippng

TridentZ RGB?

What are the specs?

Frequency, Timings, and voltage?

 

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