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d2t
Paper Tape
Posts: 3
Registered: ‎02-24-2016
Location: USA
Views: 12,028
Message 1 of 7

T460s SSD Type and Bus Speed

Hello,

I am thinking of buying the T460s with a base configuration and then upgrading the SSD myself.

Question -

 

If I choose to buy the 128GB SATA SSD, does this mean that the SSD slot can only have SATA M.2 SSD in it?

Similarly, If I choose the 256GB PCI-NVMe, then the SSD slot can hold only NVMe M.2 SSDs in it?

 

Is there even such a thing as a universal M.2 slot, that can take SATA OR NVMe SSD?

 

Thank you very much.

-D

Bink
Punch Card
Posts: 9
Registered: ‎12-05-2008
Location: Denver, CO
Views: 11,987
Message 2 of 7

Re: T460s SSD Type and Bus Speed

Per https://support.lenovo.com/us/en/products/laptops-and-netbooks/thinkpad-t-series-laptops/thinkpad-t4... , I think taking the SATA route with an aftermarket PCIe NVMe should be fine, but I too would like confirmation from an authority here.
 
That said, if Lenovo’s markup for storage wasn’t so obscene, this would be less of a concern.
helloguys
Token Ring
Posts: 131
Registered: ‎05-02-2009
Location: USA
Views: 11,921
Message 3 of 7

Re: T460s SSD Type and Bus Speed

The M.2 slot can take both SATA and NVMe(PCIe).

d2t
Paper Tape
Posts: 3
Registered: ‎02-24-2016
Location: USA
Views: 11,879
Message 4 of 7

Re: T460s SSD Type and Bus Speed

@helloguys - Thanks for the enouraging info Smiley Happy

I also got the same feedback from the Lenovo sales rep via chat.

 

Is there a doc/publication where this is mentioned?

 

Just out of curiosity - what would the slot look like?

 

For a PCI-NVMe SSD to use 4 lanes(which the T460s is supposed), the SSD has to be M-keyed.

All the SATA SSDs that I 've seen so far are B keyed or B+M keyed.  If the slot on the motherboard accepts SATA, then it has to be B+M keyed. In this case, the physical connections are missing, so the NVMe SSD would only be able to use 2-lanes.

 

Am I right or did I get all of this up-side down?

 

Thanks.

helloguys
Token Ring
Posts: 131
Registered: ‎05-02-2009
Location: USA
Views: 11,860
Message 5 of 7

Re: T460s SSD Type and Bus Speed

I don't have a T460s yet.  Per https://en.wikipedia.org/wiki/M.2 M-key supports SATA as well.  So I guess Lenovo got some SATA drives that work with M-key.

 

"For example, M.2 modules with two notches in B and M positions use up to two PCI Express lanes and provide broader compatibility at the same time, while the M.2 modules with only one notch in the M position use up to four PCI Express lanes; both examples also support SATA storage devices."

 

Also look at the last row (M-key) in the table.  It says SATA is supported with M-key.

d2t
Paper Tape
Posts: 3
Registered: ‎02-24-2016
Location: USA
Views: 11,824
Message 6 of 7

Re: T460s SSD Type and Bus Speed

That is helpful.

Thanks a lot.

onix
SCSI Port
Posts: 115
Registered: ‎03-30-2008
Location: California
Views: 8,275
Message 7 of 7

Re: T460s SSD Type and Bus Speed

@d2d, did you install the NVMe SSD on the T460s. Can you report back on UEFI/BIOS needs and changes, OS drivers, and more importantly, disk access and latency vs. spec for the one that you bought?

You can use Crystal Mark for testing. Thanks!

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