Acer Nitro 5 an515-31 slow nvme speed

atulhimi88

Hello, i just bought wd blue 500gb nvme and installed win11 on it. boot up speed is very good everything is good but getting very slow copy paste speed when i am copying and pasting any file to hdd the speed is around 70mb and when do the same in pendrive the speed is 10mb max. 
Somewhere in youtube i heard to change the SATA mode to pcie but i didnt see that only AHCI and RST with optane.

Attaching the snaps of crystalDiskmak and hwinfo.
Please help. 

brummyfan2

Hi,
What is the exact model name of the SSD? Is it WD SN 520? If it is, it could be a PCIe3x2 which is 2 lanes enabled SSD or your motherboard is restricted to 2 lanes speed only.

atulhimi88

WD SN550 500 GB

brummyfan2

Hi,
The benchmark figures from CrystalDiskMark seems fine in my opinion based on the readings of other users' results in the same model, you can view them in this link:https://www.userbenchmark.com/System/Acer-Nitro-AN515-31/68612
https://www.userbenchmark.com/UserRun/30758491

atulhimi88

Then what should i do . Somewhere i read to set SATA mode as pcie in bios but there is only two options AHCI and RST with optane. And also in bios there is nothing related to nvme or pcie.

brummyfan2

atulhimi88 said:

Then what should i do . Somewhere i read to set SATA mode as pcie in bios but there is only two options AHCI and RST with optane. And also in bios there is nothing related to nvme or pcie.

Hi,
Unfortunately, you can not change SATA mode to PCIe, it's the motherboard capability and the system decides at what speed the SSD operate, I wouldn't worry too much about benchmark results, your system is very fast with the M.2 NVMe SSD.

ttttt

@atulhimi88

I do not consider WD Blue SN 550 a high end PCIe 3.0 x4 M.2 NVMe SSD. Your PC can use x4 ( four lanes). If using a high end drive should be able to achieve something close to 3,400 MB/s seq. read for 1 TB or higher capacities. For 500GB ( or lower capacities) NVMe drives, I always expect a discount in performance, mostly because less cache used in comparing with higher capacity models.

Some high end NVMe drives to consider:

WD SN 570, SN 750 black
SK Hynix Gold P31
Samsung 970 EVO, 970 EVO Pro, 980
Silicon Power A80

Personally I have tried to switch SATA mode between AHCI and RST Optane for some of my PCs. I could not tell any performance difference. Sometimes I must use AHCI mode when installing some Linux distros. That RST Optane mode was useful before M.2 NVMe SSD became popular. By that time people used Optane memory for faster performance ( in comparing with 2.5" SATA3 SSD and HDD). It was a transition technology, was useful around Intel 7th and 8th gen Intel CPU era.

Current M.2 NVMe SSD is better than Optane Memory in almost all aspects. If you have an AMD CPU PC, you just don't have that kind of AHCI and RST Optane choice. To avoid confusion, I set in BIOS to use AHCI as default for my self-build PC, don't have to worry about incompatibility problems if switching SATA modes for Linux.

Just helped a friend with his 8th gen Intel CPU desktop. Toss out his 16 GB Optane Memory and gave him my WD SN520 ( a x2 NVMe SSD, just 1,700 MB/s read). This x2 drive is still much better than the Optane memory.