Can I connect an U.2 (SFF-8639) SSD on the SATA Express connector of the motherboard?

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tafreire

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Aug 23, 2016
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Since the SATA Express cable uses the SFF-8639 (U.2) connector at one end (SSD plug), can I connect an SSD Intel 750 2.5'' (U.2) on a SATA Express connector of the motherboard?
 
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basroil

basroil

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Oct 19, 2013
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That SSD does NOT use SATA Express, rather NVMe, so it will not work. You can however use a PCIe riser board for it.

You are confusing the connector (U.2) for the underlying technology (sata express). Your motherboard just happens to support sata express over U.2 connector, perhaps it supports NVMe too, but you can't convert once to sata express and then back to U.2 since now it'll be stuck in sata express while your SSD needs [strike]NVMe[/strike] full 4x pcie
 
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tafreire

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The SATA Express cable of the image above don't use the same connector SFF-8639 (now called U.2) of the SSD Intel 750 U.2?
SATA Express and U.2 don't transmit the same PCIe data/protocol?
 
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basroil

basroil

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Oct 19, 2013
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If you can find a male sata express to female u.2, theoretically it should work, but you won't find anyone trying that and you're on your own in that experiment. If you're going to use the sata express cable you should just find a sata express drive, they will be much cheaper.
 
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tafreire

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SATA Express drives do not exist. And there are a lot of motherboards with SATA Express connectors. That's why I have opened this topic...
 
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basroil

basroil

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Oct 19, 2013
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Who the hell is going to buy a sata express to U.2 cable to test something for you? If you already have that disk then just buy the damn cable yourself and return it if it doesn't work.

You do know that 99% of sata express ports double as two regular sata ports right? You aren't going to waste the ports if you just use them as standard sata!
 
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klvsmgm

Aug 2, 2018
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well in this life thankfully there are people who ask questions and people who may answer them since they experiment.Dear basroil.Unfortunatelly that will not work.Just 20 minutew ago.Tested the following ssD's with the cable you showed in the image at the following system with no succees
System Cpu I7 6950X
Mobo Asus sabertooth X99
Sdds Intel DC D3700
Seagate Nytro Xf1440
Micron MTFDGAL350 max
Bios latest release updated for the motherboard
Tsted 2 different cables just in case there was a hardaware issue on both sata express ports but with no apparent success .Bios will not see the drivesin any confuguration.Unfortunatelly pci express cable is the only way at the moment.
Regards
Any comments are welcome
 
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