So is a M.2 NVMe PCie connected using just sata 3 and not pcie x4

Daytrader

Daytrader

Daytrader

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So is a M.2 NVMe PCie connected using just sata 3 and not pcie x4 , just the same speeds as sata 3 ssd ? so to get the max speeds you must use the pcie3 x 4 lanes, read most places and it says no benefits using/loosing 2 sata 3 ports, except saving cable cluster. thx
 
Yes guys i know, but a lot of m.2 nvme gives you the choice of how you want to run them, either as sata and you loose 2 x your sats ports, or as pcie and you loose 2 or 4 pcie lanes, so my question is, if you chouse the sata option, are you just getting sata speeds even thou your in theory using 2 sata ports, sorry i am probably not explaining myself correctly
 
Yes again i know this, it is the bios motherboard that decides, but what i have read and know so far, in bios you decide if you want to use ahci and loose a few of your sata ports, or you chouce pcie and use your pci3 x 4 lanes(only if your motherboard supports this), im asking if you chouse to loose sata ports, so using ahci, are you then only getting sata max speeds, i think this is correct, just wanting confirmation, for example my asus ranger 3 170 motherboards manual, shows, it supports M key and B key m.2, if i use b key that uses 2 of my sata ports, if i use m key i loose none and uses pcie 3 x 4 lanes.
 
Mcnumpty2323 said:
And running 1 x M2 pci~e
Wont always lose you sata ports
It's motherboard /chipset dependent
I have to run 2 or 3 before lose sata ports
Click to expand...
Yes if you dont loose sata ports you will be running at pcie3 x 2 or x 4 lanes, but older motherboards still let you use a NVMe Pcie m.2 but only at B key, that has to use/loose sata ports.
 
Bug One said:
Some NVME drives support SATA, others don't.

If you pick SATA, you get SATA speeds.
Click to expand...
Thankyou thats what i needed to hear, if the M.2 card has both M and B key, i think it will run either sata or nvme depending on m.2 socket on motherboard, if B key on motherboard that is sata speed as you only have choice of loosing ports, if M key, thats pcie3 x 4 lanes, full speed.
 
Well over the years i have 5 out of 6 used already, but i can run as pcie 3 x 4 anyway, was asking because a friend has a m.2 pcie nvme installed on his old motherboard, but he lost 2 of his sata 3 ports, and i said to him i think it is only running at sata 3 speeds B key slot, as his motherboard aint a pcie3 or M key m.2.
 
Daytrader said:
Well over the years i have 5 out of 6 used already, but i can run as pcie 3 x 4 anyway, was asking because a friend has a m.2 pcie nvme installed on his old motherboard, but he lost 2 of his sata 3 ports, and i said to him i think it is only running at sata 3 speeds B key slot, as his motherboard aint a pcie3 or M key m.2.
Click to expand...
on older hardware its possible that
you can run 1 x m2 pci-e x4 m2 nvme and yes you would lose some sata ports
to avoid confusion the make/model number of the drive would make things easier
or use something like crystaldisk info and it will tell you
if drive is sata or nvme
and if nvme if its x2 or x4
or run as ssd and read/write speeds will tell you if sata or pci-e x4
and the benefit of m2 pci-e x4 is when you have something else to copy to/ from thats as fast
another similar m2
or a fast sata raid set up
then unlike everyday use it will slaughter sata ssds
every day use a sata ssd is just so fast that a m2 wont feel much different as access times/latency come into play more than top read/write speeds
 
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