Asus Rampage V Edition 10 or MSI X99A Godlike Gaming Carbon or ?

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Crash55

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Apr 20, 2012
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I think I have narrowed down my choices to these two.

I want to two run two 1080's and an Intel 750 on U.2.

I have heard things about quality control possibly being an issue with MSI.

For Asus their is a chance that this configuration will drop my GPU's to x8 (conflicting ROG forum and Asus tech support answers - hoping to clear it up soon). There has also been some issues with using the final PCIe slot

Also it looks like I would still have a PCIe 2.0 slot left if I want to add in a sound card as opposed to on board.

Any comments about these two? Is there a third option I am overlooking? I want the build done this month so time is running out to wait for new boards to appear.
 
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weberdarren97

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This depends on the CPU.

To quote Asus Rampage model's specs
"4 x PCIe 3.0/2.0 x16 (x16, x16/x16, x16/x8/x8, x16/x8/x8/x8 or x8/x8/x8/x8 mode with 40-LANE CPU; x16, x16/x8 or x8/x8/x8 mode with 28-LANE CPU) *2
1 x PCIe 2.0 x4 *3
1 x PCIe 2.0 x1
*2 The PCIEx8_4 slot shares bandwidth with M.2 and U.2.
*3 The PCIEx4_1 slot shares bandwidth with front USB3_34 ports and back USB3.1_EC1_EA2 ports. If a X2 device is connected to the PCIEx4_1 slot, the front USB3_34 ports will be disabled. If a X4 or higher device is connected to the PCIEx4_1 slot, both front USB3_34 and back USB3.1_EC1_EA2 ports will be disabled."

You will be fine with the Asus Rampage as long as you're using a 40-lane CPU.

To quote MSI Godlike model's specs
"5 x PCIe 3.0 x16 slots (PCI_E1~E4, PCI_E6), support up to 4-way mode
- 1-way mode: x16/ x0/ x0/ x0/ x0
- 2-way mode: x16/ x0/ x0/ x16/ x0*, x16/ x0/ x0/ x8/ x0**
- 3-way mode: x16/ x0/ x0/ x16/ x8*, x8/ x8/ x0/ x8/ x0**
- 4-way mode: x8/ x8/ x0/ x16/ x8*, x8/ x8/ x0/ x8/ x4**

* For the CPU that supports 40 PCIe lanes
** For the CPU that supports 28 PCIe lanes"

You will also be fine with the Godlike Carbon if you have a 40-lane CPU. As far as I've seen, none of the higher boards will support dual x16 slots running at x16 speeds unless you're using a CPU with 40 PCIe lanes in it.
 
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Crash55

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I am planning on using a 40 lane CPU and this may still be an issue with Asus board. The U.2 slot turns on the M.2 as well but that should leave you with 40 lanes. Someone reported though that it still slowed slot 1 to x8.

When I asked Asus support they said it was a board limitation. At the same time though someone posted in the forums that they had that exact setup and everything was fine. So I asked Asus support for verification but haven't heard back. The Asus guy who comments on the ROG boards has also been quiet on this issue.
 
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Crash55

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Here is the answer I just received:


Thank you for writing back to ASUS Technical Support.

I checked and found that Two GPU's, M.2 and U.2 would account for 40 lanes is false.

The two GPU's and M.2 would account 36 lanes. (16x2 + 4= 32+4=36)

U.2 takes more bandiwdth and will be more than 40 lanes because of the Rampage V Edition 10 motherboard design.

We appreaciate your patience and understanding.

For any further queries, please feel free to reply to this E-Mail. We will be glad to assist you.

Thank you for choosing ASUS.

Regards,
Arnold. K

Customer Service Center.
ASUSTek Computer Inc.
Component Product Support: 1-812-282-2787
 
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Crash55

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Actually they didn't. U.2 only runs at x4 so it should be 40. Where are the extra lanes coming form.

Besides in the question I said I only wanted to use the U.2 but had heard that it turns on the M.2 even if it is not being used.
 
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