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M.2 with PCIe adapter on 990fx?

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Posted · Original PosterOP

Hello, I am planning on getting this Ableconn PEXM2-SSD M.2 NGFF PCIe SSD to PCI Express 3.0 x4 Host Adapter Card

And using it with 1 tb WD black m.2 

on my asus 990fx r2.0 with the nvme 2901 bios update :https://www.asus.com/us/Motherboards/SABERTOOTH_990FX_R20/specifications/

My concern is will I be able to achieve max speeds with my pcie lanes being 2.0? The adapter says "PCI Express 3.0 x4 Lane Host adapter. Supports PCIe 2.0 and PCIe 3.0 motherboard" so will it work and be able to achieve max speeds? 

If it does not work, then which SSD would you recommend that is either nvme or sata?

Thanks for any input!

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If it's the latest WD Black NVMe SSD, it appears to be getting around 1500-1800 MB/s of sustained performance. PCIe 2.0 x4 provides 2000 MB/s of bandwidth, so it should be fine.


However, note that your motherboard doesn't appear to have NVMe boot support. The BIOS change logs don't seem to mention it. You can use the drive for storage, but not to boot an OS from. If that bugs you because you wanted a boot drive, a Samsung Evo or a Crucial MX 500 should do the job fine.

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Posted · Original PosterOP

@M.Yurizaki if you check these forums

It appears that bios 2901 comes with nvme support. I have googled it and it seems others have gotten it to work as well. I think I will be able to get only 2000 mb/s speed max with it since that is the cap for pci 2.0 since the card can run up to 3400 mb/s. Hopefully I can get it to work as a boot drive. If anyone with experience on any of the parts can confirm that would be appreciated!

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I have gotten my WD blue M.2 drive to boot with my Sabertooth v2.0 through PCIe using the 2901 bios update.

The only problem I am having is that the boot drive changes on its own and I have to go into setup again and change it back. (or tap on the F8 key during bootup and select my drive) I am using Linux mint 18.3


If anyone has a solution to this I'd like to hear about it.

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