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WD Black SN850 800k IOPS random read 500GB PCIe 4.0 NVMe $139.99

  • Last Updated:
  • Jul 1st, 2021 11:17 pm
[OP]
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Jun 15, 2020
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[Amazon.ca] WD Black SN850 800k IOPS random read 500GB PCIe 4.0 NVMe $139.99

PCIe 4.0 backward compatible with PCIe 3.0.
It is same price as the 1TB SN750 at Newegg right now but the 4k random read times are faster with the SN850 than the SN750.

https://premiumbuilds.com/comparisons/w ... -vs-sn850/
Last edited by launch on Jul 1st, 2021 9:34 pm, edited 5 times in total.
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8 replies
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launch wrote: PCIe 4.0 backward compatible with PCIe 3.0.
It is $10 more than the 1TB SN750 at Newegg right now but I recommend it over the SN750 even if you only have a PCIe 3.0 motherboard because the 4k random read and write times are almost twice as fast with the SN850 than the SN750.

The 4k random write is used well over 50% of the time in a typical computer and so 4k random transfer speeds is more important to the typical user than the difference of high sequential performance that is used primarily to market SSD sales. I think most users would be happier with 500GB twice as fast 4k random times than twice as much of slower storage.
Not sure where you got the twice as fast at random writes stat from but it's incorrect. The 500GB SN850 is rated for 570k IOPS for writes while the 1TB SN750 is rated for 560k IOPS.

You need to remember that lower capacity drives often perform more poorly than their higher capacity counterparts, especially when it comes to write performance, due to them typically having less NAND packages on board (this is not true if higher density packages are used instead, which is often why 2TB drives don't perform better than 1TB). It's hard to find clean benchmarks for a 500GB SN850 so I'm kinda forced to use userbenchmark (which is a terrible tool full of inconsistencies and bias, but I digress) to compare 4k performances but you can see the 4k tests, in particular 4k writes, were the ones that the 500GB SN850 showed the least distance from the 1TB SN750 on.

Is it faster? Sure. Will the average user notice a significant difference, I doubt it. I think its reckless to tell people that a 500GB SN850 is a better buy for general use than a 1TB SN750, which at the current price is a friggin steal. Frankly, most users would be happier with the extra storage.
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Jep4444 wrote: Not sure where you got the twice as fast at random writes stat from but it's incorrect. The 500GB SN850 is rated for 570k IOPS for writes while the 1TB SN750 is rated for 560k IOPS.

You need to remember that lower capacity drives often perform more poorly than their higher capacity counterparts, especially when it comes to write performance, due to them typically having less NAND packages on board (this is not true if higher density packages are used instead, which is often why 2TB drives don't perform better than 1TB). It's hard to find clean benchmarks for a 500GB SN850 so I'm kinda forced to use userbenchmark (which is a terrible tool full of inconsistencies and bias, but I digress) to compare 4k performances but you can see the 4k tests, in particular 4k writes, were the ones that the 500GB SN850 showed the least distance from the 1TB SN750 on.

Is it faster? Sure. Will the average user notice a significant difference, I doubt it. I think its reckless to tell people that a 500GB SN850 is a better buy for general use than a 1TB SN750, which at the current price is a friggin steal. Frankly, most users would be happier with the extra storage.
Thanks for the feedback. I've adjusted my post accordingly. Just mentioning that the read times are faster and posted my source of information. Have taken out the recommendation so I'm just posting the facts rather than giving advice.
https://premiumbuilds.com/comparisons/w ... -vs-sn850/
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What has been the lowest price for the SN750 1TB ?
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ppl4golf wrote: What has been the lowest price for the SN750 1TB ?
The lowest I've seen is $149.99, and then there's the current $10 off coupon code as well, which I think brings it to an ATL
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ppl4golf wrote: What has been the lowest price for the SN750 1TB ?
Not counting price errors, the current $140 Shellshocker on Newegg is afaik the ATL.
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launch wrote: Thanks for the feedback. I've adjusted my post accordingly. Just mentioning that the read times are faster and posted my source of information. Have taken out the recommendation so I'm just posting the facts rather than giving advice.
https://premiumbuilds.com/comparisons/w ... -vs-sn850/
Unfortunately they're still not benching the 500GB SN850 vs the 1TB SN750. The SN850 might maintain that lead in reads but in write it'll probably be much closer.

Anyways, for most users, it's kinda moot. This is a drive thats best suited for content creation (and some other professional workloads), not day to day use and honestly, those who need the speed will probably go for higher capacities anyways, since they'd be working with large files and the write speeds are so much better. Overall, I feel like these low capacity high end drives only get attention from PC builders who think they'll get some benefit from having a lightning fast boot drive and a secondary storage/gaming SSD when generally they'd be better off just getting one high capacity drive of something that's pretty good.
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Darkblade48 wrote: The lowest I've seen is $149.99, and then there's the current $10 off coupon code as well, which I think brings it to an ATL
Thanks a lot !
You can probably tell I am not fully UTD on the price watching game and stuff.
Anyways, how to get the extra $10 off (I assume for Amazon)?
TIA !

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