Question WD_Black SN770 1TB vs SanDisk Extreme 1TB

[salgorio]

The same SSD?

SN770 Nand flash: Made in China.
Extreme Nand flash: Made in Malaysia.

 

[rgd1101]

https://www.windowscentral.com/western-digital-finalizes-16-billion-sandisk-acquisition

 

[salgorio]

https://www.windowscentral.com/western-digital-finalizes-16-billion-sandisk-acquisition

Yes... but it's means that both are the same SSD?.

 

[rgd1101]

check all the serial# on the all chips?

 

[salgorio]

check all the serial# on the all chips?

may be.

 

[Moonstick2]

This image shows a SanDisk controller on an SN770, and the two spec sheets on the Western Digital website gives exactly the same sequential/random read/write specs, so I'd say they're the same design.

The actual manufacturer is different (Malaysia vs China), and some of the surface components might be sourced from different places.

 

[salgorio]

If so, the 'SD Extreme' is a good option for the buck.

 

[Ralston18]

Might be interesting to compare the QR codes.....

If even readable.

 

[salgorio]

Not readable.

 

[fzabkar]

They look similar to an SN580 Blue:

https://www.tomshardware.com/reviews/wd-blue-sn580-ssd

The SN740 has the same R/N (MVBSN1):

https://www.tomshardware.com/pc-components/ssds/wd-sn740-2tb-review

 

[salgorio]

You're rignt, but SN770 & SanDisk Extreme they have the same specifications, not the SN580.

The R/N (MVBSN1) is the same for SN740, SN770, SN580 and SD Extreme..., at least.

 

[rgd1101]

what is your goal anyway?

 

[salgorio]

Just curiosity...,, if possible.

 

[Maxxify]

WDS100T3X0E: Polaris Mp16+ and 112L TLC (BiCS5, special 1600 MT/s version).

SDSSDX3N-1T00: Polaris Mp16+ and 112L TLC (BiCS5, special 1600 MT/s version).

Same drive, even same 73xxxxWD firmware.

 

[fzabkar]

You're rignt, but SN770 & SanDisk Extreme they have the same specifications, not the SN580.

The R/N (MVBSN1) is the same for SN740, SN770, SN580 and SD Extreme..., at least.

It looks to me as if WD has created an artificial performance class by crippling the Black.

The [SN580] drive uses WD’s proprietary controller technology under the SanDisk label. This four-channel controller is similar to what’s found on many of WD’s other NVMe SSDs, including the Green SN350, Blue SN500, Blue SN550, Blue SN570, and Black SN770. It appears to be running at a lower bus rate than the SN770, perhaps necessary to help differentiate the drives. The flash is the same 112-Layer TLC (BiCS5) used to good effect on the SN570 and SN770.

 

[Maxxify]

It looks to me as if WD has created an artificial performance class by crippling the Black.

They engage in product segmentation with their proprietary controllers. So you have the Polaris Mp16 (x4 3.0 + 1200 MT/s) for SN350/SN550 variants and then the Mp16+ (x4 4.0 + 1600 MT/s) for the SN580/SN770. The SN580 is slower (4.15 GB/s v 5.15 GB/s) even with the same BiCS5, suggesting the SN580 is running the Mp16+ at 1200 MT/s but at x4 4.0 instead of the Mp16's x4 3.0. They could also pair it with the slower BiCS5 (1200 v 1600 MT/s) but it appears just to be set with a lower bus. They also play around with the interface for certain drives, so that's not set in stone (obviously).