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you are misinformed about QLC, you have to exhaust write cache not simply 50% of storage.
this is typically 12-25GB! and not a factor for most users. And extracting games is Read which is never affected
Quote
from CharleyW
:
TLC!
There are four types of nvme from best to worst, SLC MLC TLC and qlc. avoid QLC at all costs! When qlc goes past 50% of storage capacity it will lose write speed dramatically! Once you get towards full and you try to extract 50GB Game you're write speed can drop all the way down to a few 100 KB/second. You read correctly KB per second!
TLC!
There are four types of nvme from best to worst, SLC MLC TLC and qlc. avoid QLC at all costs! When qlc goes past 50% of storage capacity it will lose write speed dramatically! Once you get towards full and you try to extract 50GB Game you're write speed can drop all the way down to a few 100 KB/second. You read correctly KB per second!
This is incorrect and way oversimplified.
Slickdealers, use this write up from NewMaxx on what the pros/cons are and what SSD is right for you:
TLC!
There are four types of nvme from best to worst, SLC MLC TLC and qlc. avoid QLC at all costs! When qlc goes past 50% of storage capacity it will lose write speed dramatically! Once you get towards full and you try to extract 50GB Game you're write speed can drop all the way down to a few 100 KB/second. You read correctly KB per second!
Which of the drives in this deal are TLC. All of them?
TLC!
There are four types of nvme from best to worst, SLC MLC TLC and qlc. avoid QLC at all costs! When qlc goes past 50% of storage capacity it will lose write speed dramatically! Once you get towards full and you try to extract 50GB Game you're write speed can drop all the way down to a few 100 KB/second. You read correctly KB per second!
This is wrong info and a dramatic over simplification. QLC is fine 99% of the users 99% of the time.
Which of the drives in this deal are TLC. All of them?
Crucial P2 - TLC NAND, DRAM-less (with Host Memory Buffer aka HMB)
Crucial P1 - QLC NAND, with DRAM (DDR3)
Samsung 970 EVO Plus - TLC NAND, with DRAM (LPDDR4)
Seagate Barracuda 510 - TLC NAND, with DRAM (DDR4)
Team Group Cardea C440 - TLC NAND, with DRAM (DDR4)
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This is wrong info and a dramatic over simplification. QLC is fine 99% of the users 99% of the time.
That is an overstatement. QLC has limitations which are relevant for a meaningful amount of people. Putting an exact number on it is difficult but it's more than 1% of people. Anyone who does large data transfers, or a large amount of writes overall, can run into issues with QLC. That's many people in engineering/science fields, graphic design, or even just people who frequently transfer large games or movies back and forth between drives. For many people, 50gb transfers are nothing.
Last edited by GreenPanther4395 February 17, 2021 at 08:37 AM.
you are misinformed about QLC, you have to exhaust write cache not simply 50% of storage.
this is typically 12-25GB! and not a factor for most users. And extracting games is Read which is never affected
The cache will decrease as the drive fills. In reality all drives that aren't mlc will start to slow substantially when more than ~65% full. Dramless and qlc being the worst in this respect.
Last edited by GreenPanther4395 February 17, 2021 at 08:47 AM.
the cache may decrease but in the case of the 1 QLC drive listed it's still 25GB at nearly full - so the claim is still bogus if there's sufficient cache. that's the cause of a slowdown.
all SSDs slow down as they fill because of fewer data pathways - either way it's not the regurgitated factoid from a noob who misread it from some forum.
Quote
from GreenPanther4395
:
The cache will decrease as the drive fills. In reality all drives that aren't mlc will start to slow substantially when more than ~65% full. Dramless and qlc being the worst in this respect.
the cache may decrease but in the case of the 1 QLC drive listed it's still 25GB at nearly full - so the claim is still bogus if there's sufficient cache. that's the cause of a slowdown.
all SSDs slow down as they fill because of fewer data pathways - either way it's not the regurgitated factoid from a noob who misread it from some forum.
Yes clearly that guy was mistaken but the notion that qlc drives have no downside for 99% of us, or that the slc cache fixes all, isn't true either. Both sides have wildly exaggerated.
Between natural slowing of the drive as it fills, and the reduction of cache as it fills, many use cases are restricted by qlc drives such as this. Does that apply to someone who just casually uses their computer for games and web surfing? Not really. But many people use their computers for more. 25gb+ transfers are not that uncommon. Further, those of us who use these drives as scratch drives for editing (as basically more RAM), can run into issues with endurance.
People should understand the limitations and decide for themselves. It doesn't help anyone for one side to say it's qlc trash and the other to say it's appropriate for 99% of use cases.
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this is typically 12-25GB! and not a factor for most users. And extracting games is Read which is never affected
There are four types of nvme from best to worst, SLC MLC TLC and qlc. avoid QLC at all costs! When qlc goes past 50% of storage capacity it will lose write speed dramatically! Once you get towards full and you try to extract 50GB Game you're write speed can drop all the way down to a few 100 KB/second. You read correctly KB per second!
There are four types of nvme from best to worst, SLC MLC TLC and qlc. avoid QLC at all costs! When qlc goes past 50% of storage capacity it will lose write speed dramatically! Once you get towards full and you try to extract 50GB Game you're write speed can drop all the way down to a few 100 KB/second. You read correctly KB per second!
Slickdealers, use this write up from NewMaxx on what the pros/cons are and what SSD is right for you:
https://www.reddit.com/r/NewMaxx/...resources/
https://ssd.borecraft.c
Hint: you don't need prosumer drives to play games. There are tons of budget vs prosumer SSDcomparison videos on gaming out there.
There are four types of nvme from best to worst, SLC MLC TLC and qlc. avoid QLC at all costs! When qlc goes past 50% of storage capacity it will lose write speed dramatically! Once you get towards full and you try to extract 50GB Game you're write speed can drop all the way down to a few 100 KB/second. You read correctly KB per second!
There are four types of nvme from best to worst, SLC MLC TLC and qlc. avoid QLC at all costs! When qlc goes past 50% of storage capacity it will lose write speed dramatically! Once you get towards full and you try to extract 50GB Game you're write speed can drop all the way down to a few 100 KB/second. You read correctly KB per second!
Crucial P1 - QLC NAND, with DRAM (DDR3)
Samsung 970 EVO Plus - TLC NAND, with DRAM (LPDDR4)
Seagate Barracuda 510 - TLC NAND, with DRAM (DDR4)
Team Group Cardea C440 - TLC NAND, with DRAM (DDR4)
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this is typically 12-25GB! and not a factor for most users. And extracting games is Read which is never affected
all SSDs slow down as they fill because of fewer data pathways - either way it's not the regurgitated factoid from a noob who misread it from some forum.
all SSDs slow down as they fill because of fewer data pathways - either way it's not the regurgitated factoid from a noob who misread it from some forum.
Between natural slowing of the drive as it fills, and the reduction of cache as it fills, many use cases are restricted by qlc drives such as this. Does that apply to someone who just casually uses their computer for games and web surfing? Not really. But many people use their computers for more. 25gb+ transfers are not that uncommon. Further, those of us who use these drives as scratch drives for editing (as basically more RAM), can run into issues with endurance.
People should understand the limitations and decide for themselves. It doesn't help anyone for one side to say it's qlc trash and the other to say it's appropriate for 99% of use cases.
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Join The Conversation
Share your experience with the Slickdeals community
Share information with the community. Please follow our Community Guidelines and be kind!