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Pieter_2
Paper Tape
Posts: 1
Registered: ‎09-10-2018
Location: BE
Views: 3,236
Message 1 of 4

T480 M.2 2242 NVMe slot extender - where to buy?

My T480 came with the standard 512GB NVMe SSD in-a-caddy. I'd need some more storage so am attempting to tweak the laptop, putting in 2 SSD into the 2.5" space. Here's my plan:

 

M.2 2280 NVMe/SATA 
-> Proprietary connector (F) on the motherboard 
  -> Proprietary connector (M) 00UR495 
    -> SATA-600 (F) 00UR495 
      -> M.2(NGFF) SATA KEY B+M SSD to SATA Adapter card 
        -> Crucial MX500 M.2 Type 2280 SSD 

M.2 2242 NVMe slot 
-> NGFF M.2 PCIe M-Key extension card with 20CM cable 
  -> Lenovo SSD M.2 2280 PCIe NVMe 512GB OPAL 2.0 SSD M.2 2280 Samsung (FRU 00UP490)

I thought of extending the M.2 2242 NVMe slot with an extender card but turns out it doesn't fit. These are the two pieces I'd like to connect by an extender card:

 

Motherboard: Lenovo T480 M.2 B-key (NVMe only x4 slot, x2 physically wired)
--> The 6 pins on the bottom (only 5 physically wired) suggest to me that this is a B key M.2 slot.

NVMe SSD:
Lenovo NVMe SSD M-key (PCIe GEN3 x4 NVMe)

 

The extender card I had attempted early, but that doesn't fit the M.2 2242 NVMe slot:

http://eshop.sintech.cn/storage-adapter-ngff-m2-pcie-c-130_137.html

 

Am I correct to conclude that the M.2 2242 NVMe slot is B key? Or is this a more special WWAN slot or alike?

 

Edit: some reference(s)

So an NVMe SSD like a Toshiba RC100 does fit this with Form Factor M.2 2242 single sided, B+M key does fit the slot.

sclexman
Bit Torrent
Posts: 4,580
Registered: ‎11-22-2011
Location: US
Views: 3,190
Message 2 of 4

Re: T480 M.2 2242 NVMe slot extender - where to buy?

Your storage specs:

Storage

System has one HDD slot or one M.2 2280 slot exclusively for storage

Some: HDD / SATA 6.0Gb/s, 2.5" wide, 7mm high, Active Protection System <<not you

Some: SSD / SATA 6.0Gb/s, 2.5" wide, 7mm high (e.g. xxxGB SSD)   <<not you

Some: M.2 SSD / PCIe NVMe, PCIe 3.0 x 4, 32Gb/s  <you are here

 

Some: 128GB M.2 SSD / PCIe NVMe, PCIe 3.0 x 2, 16Gb/s, in WWAN slot as 2nd Storage, mutually exclusive with WWAN

Some: 16GB Intel Optane memory, PCIe NVMe, PCIe 3.0 x 2, 16Gb/s, in WWAN slot as storage cache for HDD, mutually exclusive with WWAN

 

Your HDD slot has a cage holding a PCIe 3x4 M.2 2280 OPAL 512GB. NO sata interface.

 

If your WWAN slot is empty, you can add 1 of the following: No sata interface, it is a pcie 3x2 . 

 

(1)M.2 2242 PCI/e 3x2 128GB NVME only            part 00UP650

**You can put a M.2 2242 PCI/e 3x4 256GB NVME here and use it as your OS boot drive(C). It will only use 2 lanes. Another forum user would have to verify this. ***

 

(2)The Intel OPTANE memory PCI/e 3x2. 16GB part 00UP481

This option is normally shown with a SATA spinner in the HDD slot.

 

Different models of the T480 have various versions of the interfaces.  

Do NOT be concerned with the KEYS you see in the slot.  Not all keys are wired into the motherboard.

 

Kindly note the WWAN slot can run PCI/e  3 x4, ie 4 lanes, but Lenovo has set a parm in the BIOS code to only run it 3 x 2,  2 lanes.

 

Shopping list:

https://www.anandtech.com/show/9799/best-ssds

iamdmc
What's DOS?
Posts: 1
Registered: ‎11-02-2018
Location: US
Views: 2,576
Message 3 of 4

Re: T480 M.2 2242 NVMe slot extender - where to buy?

Re: "1)M.2 2242 PCI/e 3x2 128GB NVME only            part 00UP650

**You can put a M.2 2242 PCI/e 3x4 256GB NVME here and use it as your OS boot drive(C). It will only use 2 lanes. Another forum user would have to verify this. ***

  ...  ...

Different models of the T480 have various versions of the interfaces.  

Do NOT be concerned with the KEYS you see in the slot.  Not all keys are wired into the motherboard.

 

Kindly note the WWAN slot can run PCI/e  3 x4, ie 4 lanes, but Lenovo has set a parm in the BIOS code to only run it 3 x 2,  2 lanes"

 

The B-key slot is rated at PCIe x2. How can it run at x4 (M-key slot)? I'm genuinely interested. 

 

M-keyed M.2 SSDs are all designed to run at PCIe x4 speeds

 

2x lanes of bandwidth a 'B' keyed M.2 SSD gives 10Gbit/s performance, whereas the 4x lanes on 'M' gives up to 20Gbit/s (theoretical max)

 

Also, you can run SATA SSDs on x4 PCIe slots as they're designed for it. From Wikipedia: "The M.2 specification provides up to four PCIe lanes and one logical SATA3(6 Gbit/s) port, and exposes them through the same connector so both PCI Express and SATA storage devices may exist in the form of M.2 modules" Hence you should be able to run either a 2242 PCIe SSD or 2242 SATA SSD on this port. Obviously, you'd be better off running the PCIe SSD for speed, but if you have a 2242 SATA drive laying around collecting dust you may as well use it. Interestingly, you can also use the NVMe slot for another USB 3.0 or 2.0 port.

Community SeniorMod
Community SeniorMod
Posts: 6,894
Registered: ‎01-13-2008
Location: US
Views: 2,561
Message 4 of 4

Re: T480 M.2 2242 NVMe slot extender - where to buy?

I admit I couldn't follow most of the above, but since 2242 is mentioned I'll point out that the 2242 slot in the T480 is PCIe/NVMe only.

 

https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T/Thinkpad-T480-M2-2242-SSD/td-p/4005476

 

Z,.


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