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z370 + 8700k + M.2 + PCIe question about PCIe lanes sharing

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post #11 of 16 (permalink) Old 12-30-2017, 07:26 PM
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This thread brings me to a question that I've been wanting to ask for quite a while. If I installed an m.2 into a GPU pcie slot (using an adapter) to use as my boot drive, would the drive be routed through the CPU lanes hence increasing performance? Thanks in advance : ]
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post #12 of 16 (permalink) Old 12-30-2017, 08:10 PM
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This thread brings me to a question that I've been wanting to ask for quite a while. If I installed an m.2 into a GPU pcie slot (using an adapter) to use as my boot drive, would the drive be routed through the CPU lanes hence increasing performance? Thanks in advance : ]
In a single-drive situation it would not increase performance.

It would take stressing two drives at the same time for any benefit to be seen.

Plus, it would take your GPU down to x8, and performance would go down. By a small amount, but it would definitely go down.

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post #13 of 16 (permalink) Old 12-30-2017, 08:29 PM
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The build I've had in mind wouldn't have a GPU at all but either way it doesn't sound like it's worth fooling with so far. Thanks Madman thumb.gif
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post #14 of 16 (permalink) Old 12-31-2017, 05:04 PM
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The build I've had in mind wouldn't have a GPU at all but either way it doesn't sound like it's worth fooling with so far. Thanks Madman thumb.gif

Then it could potentially increase performance, but not really, since you can't RAID CPU connected M.2 drives on the Z370 platform (you can on X399 with NVMe drives, and on X299 with VROC).

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post #15 of 16 (permalink) Old 01-30-2018, 01:16 AM
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Hi all

I have a Asus strix X99 gaming board - with a i7 6850k (40 PCIe lanes) I did this on purpose because i want a second GFX card sometime later and want both of my card to run at 16x speed.

I have a samsung 960 pro nvme m.2 disk (512gb) mounted directly on motherboard using PCH.

If i put my samsung 960 pro in a PCIe m.2 adapter - would I get higher speeds? Since i have plenty of unused lanes both on cpu and board. such as this one: https://www.asus.com/Motherboard-Acc..._X4_MINI_CARD/


I guess i will have to try.
Does anyone know how many lanes the PCH m.2 connector utilizes from the chipset? also 4?
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post #16 of 16 (permalink) Old 02-16-2019, 01:05 PM - Thread Starter
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Wauw... 2 years later I reply

And it might be 2 years later since I visit OCN again... but yeah... after 10 years of heavy learning overclocking...


But since 2 weeks now I got my PC. Just have to figure out again where I can change my sig/rig/whatever to this setup

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