Jump to content

External NVME m.2 way slower than advertised

DaroFreeman
By DaroFreeman
in Storage Devices
 Share
Posted

Hi!

Yesterday I bought this enclosure: https://www.amazon.com/dp/B09T97Z7DM
I then bought this m.2: https://www.amazon.com/dp/B09K3H2YHX

When checking the speeds with Crystal Disk they reach nowhere near what it's capable of.
These are the speeds: https://prnt.sc/lshS7PQao2s3

I also ran my C Drive to confirm that CrystalDisk is working and they came back to this: https://prnt.sc/EFShL3BqZ1lA
My C Drive is a Samsung 980 Pro: https://www.amazon.com/dp/B09J159SWL

I have also tested the m.2 and enclosure on my MSI Prestige 15 with Thunderbolt, however it's getting the same speed over there.
Is there anything I'm doing wrong? Thanks in advance!

Link to comment
Share on other sites
Link to post
Share on other sites
Posted
  • Author
2 minutes ago, Electronics Wizardy said:

What speed are you expecting? Its rated for 10gbit, and about 1000mB/s is near the limit of that enclosure.

Oh, I think I misunderstood the description then. I thought the 10Gbps would mean I would be able to go up to 10000 MB/s but that means it's only able to go up to 1000 MB/s? That makes sense then...

Link to comment
Share on other sites
Link to post
Share on other sites
Posted
20 minutes ago, DaroFreeman said:

Oh, I think I misunderstood the description then. I thought the 10Gbps would mean I would be able to go up to 10000 MB/s but that means it's only able to go up to 1000 MB/s? That makes sense then...

1 Byte is 8 bits.

 

10 Gbps is 10x1000x1000x1000 bps.

10 000 000 000.

Divide by 8.

1 250 000 000

Divide by 1024 to get KiBps, then divide by 1024 to get MiBps.

1192 MiBps.

So less than 1200 would be the theoretical throughput of that case over USB.

 

If you want higher speeds, get a faster enclosure and make sure you're using it on a faster enough USB port on your PC.

M.S.C.E. (M.Sc. Computer Engineering), IT specialist in a hospital, 30+ years of gaming, 20+ years of computer enthusiasm, Geek, Trekkie, anime fan

  • Main PC: AMD Ryzen 7 5800X3D - EK AIO 360 D-RGB - Arctic Cooling MX-4 - Asus Prime X570-P - 4x8GB DDR4 3200 HyperX Fury CL16 - Sapphire AMD Radeon 6950XT Nitro+ - 1TB Kingston Fury Renegade - 2TB Kingston Fury Renegade - 512GB ADATA SU800 - 960GB Kingston A400 - Seasonic PX-850 850W  - custom black ATX and EPS cables - Fractal Design Define R5 Blackout - Windows 11 x64 23H2 - 3 Arctic Cooling P14 PWM PST - 5 Arctic Cooling P12 PWM PST
  • Peripherals: LG 32GK650F - Dell P2319h - Logitech G Pro X Superlight with Tiger Ice - HyperX Alloy Origins Core (TKL) - EndGame Gear MPC890 - Genius HF 1250B - Akliam PD4 - Sennheiser HD 560s - Simgot EM6L - Truthear Zero - QKZ x HBB - 7Hz Salnotes Zero - Logitech C270 - Behringer PS400 - BM700  - Colormunki Smile - Speedlink Torid - Jysk Stenderup - LG 24x External DVD writer - Konig smart card reader
  • Laptop: Acer E5–575G-386R 15.6" 1080p (i3 6100U + 12GB DDR4 (4GB+8GB) + GeForce 940MX + 256GB nVME) Win 10 Pro x64 22H2 - Logitech G305 + AAA Lithium battery
  • Networking: Asus TUF Gaming AX6000 - Arcadyan ISP router - 35/5 Mbps vDSL
  • TV and gadgets: TCL 50EP680 50" 4K LED + Sharp HT-SB100 75W RMS soundbar - Samsung Galaxy Tab A8 10.1" - OnePlus 9 256GB - Olymous Cameda C-160 - GameBoy Color 
  • Streaming/Server/Storage PC: AMD Ryzen 5 3600 - LC-Power LC-CC-120 - MSI B450 Tomahawk Max - 2x4GB ADATA 2666 DDR4 - 120GB Kingston V300 - Toshiba DT01ACA100 1TB - Toshiba DT01ACA200 2TB - 2x WD Green 2TB - Sapphire Pulse AMD Radeon R9 380X - 550W EVGA G3 SuperNova - Chieftec Giga DF-01B - White Shark Spartan X keyboard - Roccat Kone Pure Military Desert strike - Logitech S-220 - Philips 226L
  • Livingroom PC (dad uses): AMD FX 8300 - Arctic Freezer 64 - Asus M5A97 R2.0 Evo - 2x4GB DDR3 1833 Kingston - MSI Radeon HD 7770 1GB OC - 120GB Adata SSD - 500W Fractal Design Essence - DVD-RW - Samsung SM 2253BW - Logitech G710+ - wireless vertical mouse - MS 2.0 speakers
Link to comment
Share on other sites
Link to post
Share on other sites
Posted
41 minutes ago, 191x7 said:

1 Byte is 8 bits.

 

10 Gbps is 10x1000x1000x1000 bps.

10 000 000 000.

Divide by 8.

1 250 000 000

Divide by 1024 to get KiBps, then divide by 1024 to get MiBps.

1192 MiBps.

So less than 1200 would be the theoretical throughput of that case over USB.

 

If you want higher speeds, get a faster enclosure and make sure you're using it on a faster enough USB port on your PC.

Add to that the loss of the transfer protocols and you are at about the values you posted.


Be aware that some of the supposedly faster enclosures with Thunderbolt 3(40Gbit) or USB 3.2 SuperSpeed+(20Gbit) only run with 2 PCIe 3.0 lanes  which again limits you to about 16 Gbit. Annoyingly you really have to check for the used PCIe standard on all of them to see if they even saturate the used standard.

USB-C: https://en.wikipedia.org/wiki/USB-C

PCI-E: https://en.wikipedia.org/wiki/PCI_Express

 

Link to comment
Share on other sites
Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing Storage Devices

×