[SOLVED] Does this 2-in-1's M.2 slot operate at GT2 or GT4 ?

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knowledge2121

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I have a Dell Latitude 5175 2-in-1, which has a M.2 slot that supports x4 PCIe NVMe SSDs ...

I want to buy the Samsung 970 EVO for it, but people say that the M.2 slot cannot fully utilize the speed of the 970...because the interface operates in GT2 ... ...Is this true ?

Should I buy the Samsung 970 EVO or should I buy something slower ? Does it matter which GT mode the interface operates at ?

If I buy the Samsung 970 EVO 250GB which is x4 and has read speeds of up to 3,500MB/s .. at what speed will the SSD run when installed on the 5175 ?

Do faster x4 SSDs still function better even if the interface operates at GT2 ?

Many Thanks
 
Solution
jojesa


Yes the stock SSDs are M.2 SATA.
If you get a M.2 PCI-e NVMe drive it will be faster than the SATA drive but you won't see speeds above 800...which is still very fast.
You will have an idea of the speed by a Dell device could achieve by the classification.
A Dell Latitude 5175 2-in-1 is an up to Class 40 1500 read / 350 write (sequential theoretical)
Dell Class 50 devices will reach speeds above 1500 up to 2100 (sequential theoretical).

The Dell Latitude 5175 2-in-1 has a Skylake ultra low (U, Y, Core M, etc ) 4.5-7W CPU supports 4GT , it will run in...
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jojesa

jojesa

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That laptop model comes with either 128GB LiteOn or 256GB Samsung Evo.
I have upgraded the two models and the speed does not go above 464 MB/s read and 260 MB/s writes.
The 256GB Samsung Evo I removed, I tested in another laptop and the read speed went up to 550 MB/s and the write to 290 MB/s.

So, I would not spend money on fast and expensive SSDs since that system does not take advantage of it.
 
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jojesa

jojesa

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Dec 6, 2006
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Yes the stock SSDs are M.2 SATA.
If you get a M.2 PCI-e NVMe drive it will be faster than the SATA drive but you won't see speeds above 800...which is still very fast.
You will have an idea of the speed by a Dell device could achieve by the classification.
A Dell Latitude 5175 2-in-1 is an up to Class 40 1500 read / 350 write (sequential theoretical)
Dell Class 50 devices will reach speeds above 1500 up to 2100 (sequential theoretical).

The Dell Latitude 5175 2-in-1 has a Skylake ultra low (U, Y, Core M, etc ) 4.5-7W CPU supports 4GT , it will run in 2GT mode configured by the manufacturer. This type of configuration allows the manufacturer to reduce heat and extend battery life in passively cooled tablets and 2-in-1 notebooks.
Dell XPS, Alienwares and gaming devices might run in 4GT mode.

 
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knowledge2121

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If I buy the Samsung 970 EVO 250GB which is x4 and has read speeds of up to 3,500MB/s .. at what speed will the SSD run when installed on the 5175 ?

Do faster x4 SSDs still function better even if the interface operates at GT2 ?
 
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karenjoly

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There is no GT2 or 4. That's likely a misnomer for something else.

The spec sheet you mention shows that the model began with a M2 SATA drive and graduated to a NVMe version, the latter being the speed demon, the former capable of the usual SATA throughput. So when someone says you can't get NVMe speeds from a SATA drive, so true, but the model you quote also comes with the faster drive so should (I say should+ ) support the 970 EVO.
+Be aware that I said should by which I mean/could/might/etc.
 
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