NVme with Asus h310m-a not work properly. Very frustrating

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shraz92

Jul 1, 2018
3
0
10
Hi all.
I recently bough new computer for my mother.
The computer specification is:
I5 8500
8 RAM
ASUS h310m-a
AData xpg sx8200 480GB
W.D Blue 1TB
PSU Corsair 450W

The situation is the in all tests speed of the NVME i get 800-830MB insted 3200MB. i tried every things. suche....
Update Bios...
Different OS...
Change setting in BIOS about the m.2 connection (SATA/PCI-E)...
unplug and plug again...
change different SATA connection..
Reset Bios....
and Update all the relevant and latest drivers.

On each method I tried I checked the speed with Disk mark and got the 800MB speed.

When I connect the M.2 drive to my primery computer, I managed to get the 3200MB.
Please guys help me solve it.


Thanks

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Solution
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Here's the spec note on Asus' website:
*1 When a device in SATA mode is installed on the M.2 socket, SATA_2 port cannot be used.
Due to the Chipset limitation, when a M.2 device is installed in PCIe mode, the socket is set
to PCIe 2.0.

Also it's x2 on PCI mode (https://www.asus.com/us/Motherboards/PRIME-H310M-A/specifications/)

PCI 2.0 has a max speed of 500MB/s per lane. So, for 2 lanes, you get 1000MB/s theoretically. Based on your Crystal disk mark snapshot, you're getting good speeds based on the limitations of the motherboard. I'm going to guess that the mobo in your primary PC is using x4 PCIe 3.0. Thus, you're seeing the max speed of the SSD.
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Scottray

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Jul 14, 2016
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Here's the spec note on Asus' website:
*1 When a device in SATA mode is installed on the M.2 socket, SATA_2 port cannot be used.
Due to the Chipset limitation, when a M.2 device is installed in PCIe mode, the socket is set
to PCIe 2.0.

Also it's x2 on PCI mode (https://www.asus.com/us/Motherboards/PRIME-H310M-A/specifications/)

PCI 2.0 has a max speed of 500MB/s per lane. So, for 2 lanes, you get 1000MB/s theoretically. Based on your Crystal disk mark snapshot, you're getting good speeds based on the limitations of the motherboard. I'm going to guess that the mobo in your primary PC is using x4 PCIe 3.0. Thus, you're seeing the max speed of the SSD.
 
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