USB 3.2 Gen 2 Portable SSDs Roundup - Featuring the Samsung T7 Touch and the SanDisk Extreme Pro
by Ganesh T S on January 23, 2020 9:00 AM ESTSynthetic Benchmarks - ATTO and CrystalDiskMark
Most USB 3.2 Gen 2 NVMe-based SSDs claim read speeds of up to 1050 MBps and write speeds of up to 1000 MBps. Most of these claims are backed up by the ATTO benchmarks provided below. Unfortunately, these access traces are not very common in real-life scenarios.
| Drive Performance Benchmarks - ATTO |
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The 2TB OWC Envoy Pro EX USB-C tops the write charts at close to 935 MBps, with the rest clustered between 850 MBps and 900 MBps. On the read side, the drives are clustered around 970 MBps to 980 MBps.
CrystalDiskMark, despite being a canned benchmark, provides a better estimate of the performance range with a selected set of numbers. As evident from the screenshot below, the performance can dip to as low as 20 - 40 MBps for small-sized reads at very low queue depths.
| Drive Performance Benchmarks - CrystalDiskMark |
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Read speeds saturate around 1020 MBps for most drives, and writes around 900 MBps. The T7 Touch appears to lag behind the rest a bit in all the workloads, while remaining in the same ballpark.
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zebrax2 - Thursday, January 23, 2020 - link
For the ATTO you can probably create 2 line charts, for bytes and IO, with the read having solid lines and writes using dashed lines and lighter colors for example.As for CDM something similar to the charts here
https://www.anandtech.com/show/15207/the-snapdrago...
Anyway this is only my suggestion. If you do decide to keep the current layout may I at least suggest to have the expand all options on all the benchmark (e.g. the ATTO and CDM results doesn't have this option)
mm0zct - Thursday, January 23, 2020 - link
I agree that it's not helpful to have all the comparisons separate, hidden under pulldown (can we get consolidated comparison graphs please?), but I'd also be interested to see the T5 in here for comparison as a SATA based USB3.1 gen2 drive.MScrip - Thursday, January 23, 2020 - link
Exactly. It would be nice to include a comparison to Samsung's previous highly-regarded SSD... the venerable Samsung T5 drive.Whenever there is a new version of a device... it's customary to compare it to the previous generation.
It appears that Anandtech is strictly comparing MVNe drives here. But it would still be helpful for T5 owners.
R3MF - Thursday, January 23, 2020 - link
is it fair to say that if you want ssd file storage that requires sustained sequential writes to 90% of disk capacity then you won't actually lose much performance by going for a sata based solution over the shiny new usb>PCI3.0 4x nvme?i.e. all that pcie bandwidth tends to be useful only for bursty activity until the SLC/ram cache is exhausted and cannot sustain full bandwidth write speeds.
Billy Tallis - Thursday, January 23, 2020 - link
Most high-end consumer NVMe SSDs can average at least 1GB/s for a whole drive write to their 1TB models. Several average 1.5GB/s or higher, even though they are still using TLC with SLC caching. So it's definitely possible to do far better than SATA-based portable storage, but it may require a higher class of NVMe drive than some portable SSDs use.R3MF - Friday, January 24, 2020 - link
thank you.recently bought a 2tb sata drive for storage.
think i'll be happy with 540MB/s vs 80MB/s for a 2.5" portable, enough that i won't miss a doubling to 1GB/s too much.
AnarchoPrimitiv - Sunday, January 26, 2020 - link
If you need the fastest performance and do not have a Thunderbolt 3 port, I'd recommend buying the newly released USB 3.2 Gen2x2 add in card released by Gigabyte if I remember correctly. It is capable of 20Gbps (so double the speed of these drives) and Western Digital just released their external P50 drive which can saturate the connection with sequential r/w at 2000MB/s. Or if you'd rather make a DIY solution with an enclosure, I believe Asmedia has released a bridge chip for USB 3.2 Gen2x2 so I'd expect enclosures to hit the market soonHStewart - Thursday, January 23, 2020 - link
One thing good about forthcoming USB4 is that Thunderbolt 3 will be full stream and prices of TB3 drives will be coming down.Korguz - Thursday, January 23, 2020 - link
maybe . but will intel still have to certify it ?? if so... that is a major hurdle for any TB device to be adopted and used....Dragonstongue - Thursday, January 23, 2020 - link
mehhh QLC (whatever want to call them) should be that much lower cost to consumer than prices I have seen as of late, likely save the company who makes them a whole whack per die (per drive) vs "regular" such as TLC certainly vs MLC and significant price difference vs the much prefered SLC design, overall has not dropped price as much as I would expect if I am to be completely honest, in other words, the makers want as many of them sold as possible to reap the RnD by making them in the first place, but at same time do not seem overly "keen" on putting on the shelves around the world at "ok" price point.That $169 easily becomes in the $240+ range most other places than USA which makes something that "seems" pretty reasonable price run into the area of "why bother when spinning rust is much much lower cost, even if slower"
mehh is all I can personally say, though thank you for the review overall ^.^