45 Posts
0
2133
what is the M.2 slots interface speed ?
I am looking at a Dell Latitude 5175, I confirmed by someone here that it supports PCIe NVMe SSDs...However I dont know the number of lanes supported...
does the M.2 slot support x2 or x4 PCIe NVMe SSDs?
ejn63
10 Elder
10 Elder
•
24.8K Posts
0
September 26th, 2018 12:00
Only the newer XPS models and Alienwares will run in GT4 mode. Even in GT2, an NVMe drive will outrun a SATA drive.
ejn63
10 Elder
10 Elder
•
24.8K Posts
0
September 26th, 2018 13:00
It's a decision the mainboard manufacturer makes - not the chipset. For desktops, running in GT4 is pretty much standard - power consumption and heat generation are non-issues.
For notebooks, power consumption and heat are major issues - one reason that the slimmer the system, the more likely the drive will run in GT2 mode - to reduce heat and extend battery runtime.
DELL-Jesse L
Moderator
Moderator
•
17K Posts
0
September 26th, 2018 08:00
ModularDesign,
The M.2 supports x4 PCIe NVMe SSDs.
ejn63
10 Elder
10 Elder
•
24.8K Posts
0
September 26th, 2018 08:00
But most likely in GT2 mode only - - so take the maximum speed quoted by the drive maker and divide it by 2.
ModularDesign
45 Posts
0
September 26th, 2018 12:00
How to know if it operates in GT2 mode ?
How about SATA3 SSD's ? will they run in half speeds too ?
ModularDesign
45 Posts
0
September 26th, 2018 12:00
So this limitation only applies to Skylake U&Y series, right ? My desktop and my gaming laptop support DMI 3.0 , which means they support full NVMe ssd speeds...right ?