ACER NITRO AN515-52 SSD GEN3 but X1 X2 or X4 which speed i can achieve? 2000/2000 according gen .

Hello,

I want to upgrade my 250GB ssd SSDPEKKW256G7 INTEL DATASHEET https://www.intel.com/content/dam/www/public/us/en/documents/product-briefs/ssd-600p-brief.pdf

Acording this datasheet this ssd is GEN 3 X4 NVMe SSD 1800MB write / 560MB read So teoreticaly if i will change this disc to some 3500/3000 it should run full speed because GEN3 line supports 1 GB/S * 4 lines = 4GB/S, but after that i found this topic

https://community.acer.com/en/discussion/549591/acer-nitro-5-an515-52-ssd-nvme-run-half-speed-help

which says that AN515-52 uses only 2 lines so this connection should be lemited to an half speed which is about 1750/1500 which makes sense. But how it is possible that original INTEL SSD is able to run full speed ~1600MB/450 (measured by cristaldisc on my nitro 5) Is there some special load balancer inside which is able to move all load to thes two lines?

Diference between GEN3 and GEN4 is an frequency so i can use some high tech SSD 7300MB read / 6000MB write but this will be downgreded by GEN3 frequency and two lines. But which speed i can achieve? 2000/2000 acording gen 3 specification?

I also try to checked the PCIe version acording this topic

https://community.acer.com/en/discussion/549200/pcie-m-2-ssd-support-for-acer-nitro-5-an515-52-50wx

But there is only sata 3 which is 6Gb/s = 600MB/s but i measured 1600MB/450 so there is somethink bad

Can i somehow increase speed or unlock gen3 X4 please help me i am so confused with this. Thank you.

[Edited the thread to add model name to the title]

Accepted answers

StevenGen

https://community.acer.com/en/discussion/comment/1213528#Comment_1213528

The Nitro AN515-52 laptop that you have has a 1x M.2 SSD slot that runs at PCIe 3 x4 and Acer provides this laptop oem with either SATA III M.2 drives or the M.2 SSD PCIe 3 x4 drives. The 256GB Intel SSDPEKKW256G7 is a PCIe 3 x4 M.2 drive and the benchmark of what the Intel Rapid Storage Technology shows at 4000MB/s read/write is exaggerated as the Intel M.2 SSD drive will never achieve those read/write speeds, do the read/write speed test of the M.2 drive with Crystal Disc Mark and see the real speeds of these drives as that is what all testers use as their M.2 SSD drives benchmark test results, so that you can compare it with them.

Just as an example, the quickest PCIe 3x4 M.2 drives around (as the new PCIe 4 x4 are 100% quicker) are either the Samsung 970 Plus NVMe M.2 or the WD SN750 Black NVMe, so if you want a quick PCIe 3 x4 M.2 drive buy those drives, btw I’m using the WD SN750 Black and its installed in my Nitro AN515-56 that has 2x M.2 SSD slots which the boot drive is PCIe 3 x4 and the M.2 SSD 2 slot is a PCIe 3x2 and the best speeds with Crystal Disk Mark benchmarking test with this quick PCIe3 x4 drive is below

WD SN750 Black M.2 drive installed into a Nitro 5 - AN515-56 into M.2 SSD slot 1 which is the boot drive.

All comments

JackE

which says that AN515-52 uses only 2 lines so this connection should be
lemited to an half speed which is about 1750/1500 which makes sense

Yes, it can use up to 2 lanes because the mainboard drive buss physically only has up to two lanes, not four physical lanes,. between the m.2 card socket and the CPU. So while it should be compatible with Gen3 x 4 lane capable NVME card, the card speed will be limited to a maximum of about twice SATA3 r/w speeds allowed by the mainboard buss which can vary depending on brand/model card. This assumes the BIOS SATA mode is set to ordinary AHCI mode, not RAID, Intel RST or VMD.

SimonHosa

JackE, thank you for your reply.

But after I updated the BIOS to the newest one and installed Intel rapid storage technology with the driver I found this in intel application. SSD 4 links 4000mb/s. So it looks like that if I install 3500/3500 mb SSD it should run at full speed.

StevenGen

https://community.acer.com/en/discussion/comment/1213528#Comment_1213528

The Nitro AN515-52 laptop that you have has a 1x M.2 SSD slot that runs at PCIe 3 x4 and Acer provides this laptop oem with either SATA III M.2 drives or the M.2 SSD PCIe 3 x4 drives. The 256GB Intel SSDPEKKW256G7 is a PCIe 3 x4 M.2 drive and the benchmark of what the Intel Rapid Storage Technology shows at 4000MB/s read/write is exaggerated as the Intel M.2 SSD drive will never achieve those read/write speeds, do the read/write speed test of the M.2 drive with Crystal Disc Mark and see the real speeds of these drives as that is what all testers use as their M.2 SSD drives benchmark test results, so that you can compare it with them.

Just as an example, the quickest PCIe 3x4 M.2 drives around (as the new PCIe 4 x4 are 100% quicker) are either the Samsung 970 Plus NVMe M.2 or the WD SN750 Black NVMe, so if you want a quick PCIe 3 x4 M.2 drive buy those drives, btw I’m using the WD SN750 Black and its installed in my Nitro AN515-56 that has 2x M.2 SSD slots which the boot drive is PCIe 3 x4 and the M.2 SSD 2 slot is a PCIe 3x2 and the best speeds with Crystal Disk Mark benchmarking test with this quick PCIe3 x4 drive is below

WD SN750 Black M.2 drive installed into a Nitro 5 - AN515-56 into M.2 SSD slot 1 which is the boot drive.

SimonHosa

I want to use this WD Blue SN570 2 TB https://www.alza.sk/wd-blue-sn570-2-tb-d7006640.htm#parametry So it should be about 3500/3500 I think that link speed is maximum achievable speed not actual speed, measured speed of my current ssd (by cristal disc) is 1800MB read / 560MB write. 100% increased read and 500% write speed with a new SSD, that sounds good.

Thank you, I'll put there a benchmark after I change this SSD.

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