simplyfabio
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Re: 4 missing PCIe lanes
2018/10/19 11:02:39
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GGTV-Jon
If running 4 GPUs it will be 8x on each. Yes, the DMI lanes are taken out of the 44 lanes not in addition too the 44
Sorry again, :) I am pretty sure that if you use PE 1,2,4,6 (4GPU Double Slot) is x8/x8/x16/x8. If you use PE 1/2/3/4, than is X8 all of them, leaving space for another x8 on PE6.
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GGTV-Jon
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Re: 4 missing PCIe lanes
2018/10/19 11:11:01
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At work now posting on my phone. I would have to look at that layout when I get home. Unless someone else can say yes to having one odd 16x in a 4 GPU layout
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Monstieur
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Re: 4 missing PCIe lanes
2018/10/19 12:31:27
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simplyfabio
PE6 is somehow connected to PU2. When I have PU2, PE6 dropdown to x4.
Then I guess, with PE6 populated by a GPU x8, PU2 is disabled! (IF TRUE, THIS IS ALSO MISSING FROM THE MANUAL)
This is it. The only unknown now is whether you can have an x8 card in PE6 dropped down to x4 CPU lanes while PU2 is populated.
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Monstieur
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Re: 4 missing PCIe lanes
2018/10/19 12:37:49
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GGTV-Jon
I think part of what the OP was missing is that not all of the PCIe slots will connect too the CPU and was missing where it straight out said things were connected too the PCH
Also just because you have an PCIe socket in 16x size doesn't mean it cannot go down to 1x
I ignored the x4 PCH slot PE5 completely since I have no intention of using it. If a x16 slot (0-15) goes down to x1, it doesn't automatically make x4 (4-7) and x8 (8-15) slots available - the board needs to have digital switches setup accordingly. They usually only handle the x8 and waste the x4.
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bcavnaugh
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Re: 4 missing PCIe lanes
2018/10/19 12:45:06
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Sounding more and more like a Mining Rig Setup.
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Monstieur
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Re: 4 missing PCIe lanes
2018/10/19 12:45:28
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the_Scarlet_one
Are you considering the Dark motherboard strictly because of the quantity of pci lanes?
I am curious, because it seems like a different board would be far more suitable for the tasks you are looking to accomplish. The dark is overclocking focused, not feature focused, so it may hinder your needs rather than help.
The EVGA X299 Dark is the only board with all the U.2 and M.2 ports connected to the CPU, and it has 5 physial x16 slots without PLX switches. I do intend to overclock the i7-9800X, and I'll only use 4 sticks of quad-channel RAM. It also has an M.2 Key-E if I want to add Wi-Fi later. It's half the price of the Rampage VI Extreme. This seems like the best X299 board in existence.
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simplyfabio
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Re: 4 missing PCIe lanes
2018/10/19 13:11:37
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IT IS! Is the same reason why I’ve bought that for my production workstation. The Rampage has yes a good lane routing, but not the same flexibility, has this stupid NVDIMM for M.2 drive, an awful VRM heatsink and only 4+8 EPS connector, costing the double as you’ve said. BTW, tomorrow morning I’ll try to put a GPU card on PE6 and I check if it drop to x4 because of the U2.
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GGTV-Jon
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Re: 4 missing PCIe lanes
2018/10/19 13:22:34
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As far as I am aware if a GPU is detected the lowest it will go is 8x
You will have to lay with it I guess
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bcavnaugh
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Re: 4 missing PCIe lanes
2018/10/19 13:35:05
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GGTV-Jon
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Re: 4 missing PCIe lanes
2018/10/19 14:37:43
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Heh, I thought all current gen cards were base 8, was not aware there are 4x cards
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simplyfabio
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Re: 4 missing PCIe lanes
2018/10/20 02:55:43
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I confirm that with an U2 in PU2, the GPU in PE6 run at x4. And actually with a PCIE SSD also PE4 goes to x4, and I did’t know that. Instead. PE2 even with the PCIE SSD x4, stay at x8. Both working in Windows.  
post edited by simplyfabio - 2018/10/20 03:42:49
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simplyfabio
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Re: 4 missing PCIe lanes
2018/10/22 01:41:00
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I was wondering if someone in EVGA will mind if I try to update the Manual with screenshot of actual Bios 1.09 and correction about PCIe lane routing, etc. Of course the forum will review it!
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bcavnaugh
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Re: 4 missing PCIe lanes
2018/10/22 07:05:17
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simplyfabio
I was wondering if someone in EVGA will mind if I try to update the Manual with screenshot of actual Bios 1.09 and correction about PCIe lane routing, etc. Of course the forum will review it!
It might get done faster if you opened a Service Ticket on your Motherboard and or contacted EVGA. Contact Us
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