WD_Black SN770 Gen 4 SSD Review – Don’t Let Its Good Looks Fool You.


Typically, we are fortunate to be able to conduct our SSD reviews without interruption and void of outside interference and influence.  Simply put, I don’t want any outside opinion affecting my own and it is a two sided coin.  For one, it gets hard to avoid what you have already heard in your writing and secondly, that outside opinion may be totally wrong.  That wasn’t the case with the WD_Black SN770 as the ‘Reviewer Network’ had my phone pinging all through the night before a sample had even hit the office.   As much as you wish you weren’t part of that, the enthusiasm amongst reviewers is pretty exciting…finding something new and promising that should do very well on release.  That is just the case with the WD_Black SN770 Gen4 NVMe M.2 SSD.

One could call this the wolf in sheep’s clothing as it is a DRAM-less SSD that stands up beside, and surpasses the performance of some of the best SSDs in the business with respect to gaming benchmarks and true data testing…those that count.  By spec, it easily reaches its promised 5150 MB/s read and 4900MB/s write data transfer rates but let’s be real, it should never beat a 7GB/s Gen 4 SSD that is considered one of the best in the business in true data testing…but it does.  Just when you think that could be a fluke, PCMark 10 Storage Tests (both Full and Quick) provided results where only two other SSDs bettered the WD_Black SN770, the Intel Optane 5800x and the Plextor M10P 2TB Gen4 NVMe SSD.  I guess the old DRAM-less reputation just got lost in the crowd.

MSRP pricing for the WD_Black SN770 is outstanding, and maybe expected for a DRAM-less SSD, however definitely not for an SSD that competes with the best.  A 5-year warranty is standard, and WD has a free SSD Dashboard that helps to monitor and maintain your SSDs health and performance, as well as a number of other utilities.  The software has a ‘Game Mode’ and we tested with Game Mode on and off.  All of the results you see here are Game Mode results as they were the best but there isn’t much difference in our testing, a few percent maybe.  Dynamite SSD and Editor’s Choice!

Check WD_Black SN770 Pricing at Amazon.

WD_Black SN770 NVMe SSD Ratings

Product Build
5-Year Warranty
Pricing and Availability

Totally Unexpected Real World Results!

The WD_Black SN770 is a DRAM-less SSD that bears no resemblance to a DRAM-less SSD. Its real world and gaming performance surpasses that of some of the best in the business.

Check Amazon
User Rating: 5 ( 1 votes)


  1. Thanks for the test.

    So is the controller new? The one used in the WD850?
    Finally the BiCS5 nand! Can you disclose when you do the test of the upcoming WD850X?
    Will it be faster or slower? I guess the X means faster 😉

    Temperatures are nice indeed.
    Game loading shows that there is a flaw in performance. Due to the firmware? Maybe it can get better.
    The PCMark comparison is good, but as said on the test Cardea 440 Pro, your tests would benefit greatly with more real world testing instead of synthetic benchmarks.

    For this DRAM-cacheless ssd, I totally not know after what amount of GB the ssd starts to stumble and switch the pseudoCache from slc to mlc to tlc. That would be one of the important metrics to test for a dram-cacheless ssd I’d say, even when the target audience is a one that do not rank writing the whole disk in one sweep.
    What is the simultaneously mixed writing/reading-performance is,

  2. If you have an older computer that doesn’t have any SSD, this will make it fly. I did a 5-minute install on my Dell G5000 Desktop and all the hard work was taken off of me because everything just fell into place! It’s so easy with how straightforward these parts are – installation could not be easier either; there were no problems at all after following some quick YouTube videos I found online (link). And best yet? Price wise M2 from reliable manufacturers can give your tired machine new life by boosting performance like never before while still saving money in comparison to buying another one outright which saves cash over time too.

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