https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9020381
Ok.
SSD speeds of 2000/3000/7000MBps explained & why they are misleading
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I often see people comparing ssd based only on their max advertised speeds like 2000, 3000, 7000MBps etc without realizing that in most scenarios this is practically meaningless for a typical user. To understand these speeds one first need to understand basic classification of speeds of ssd/hdd which is as below:
1. Sequential speed: This is the speed which you get when copying a large file(say 1gb video file).
2. Random speed: This is the speed which your operating system(windows/linux/android) uses(aka boot, restart, software open etc) & is also used when transferring large number of small size files(say a folder with hundreds of photos each with size around few hundred kb or mb).
Rule of thumb is, sequential speeds are always much more than random speeds. Think of it as a Ferrari with 0 to 100kmph in 5 seconds given a 1 km road in case of sequential speed & a 20m stretch in case of random speed & you can imagine the avg speed achieved by Ferrari in both cases. For Hindi users it can be more humorously explained by below meme.
Basically, a device can never utilize its full speeds for random speed because by the time the device would have achieved its max speeds the task is already finished so again start from zero.
Now the second most important thing to consider is, Bottleneck.
Imagine you are waiting at a traffic signal for green light & in front of you is a manual non-motor rickshaw with no space to overtake it from side. Once the light turn green the rickshaw start moving at 10kmph & your vehicle will also need to move at same speed to avoid collision until that rickshaw move out of your front or you get some side space to overtake it. In this case rickshaw is your vehicle's bottleneck. Similarly in case of any device speed achieved in a system/process one need to take a look at what is the bottleneck because no device speed can be more than the bottleneck in the system/process.
Most people have laptop/desktop with hdd or sata ssd so using them as source/destination with a 5000MB/s NVMe ssd will result in them being the bottleneck & one will never see more than 150MB/s(typical HDD max sequential speed) or 500MB/s(typical sata ssd max sequential speed) during transfer. To see the 5000/7000MB/s speed during transfer one need two of such NVMe ssd installed within the same pc(laptop/desktop) with one acting as source & other as destination to remove the bottleneck.
So to conclude, don't buy a ssd just based on its max advertised speed which is always its max sequential speed. Decide based on your usage(more sequential data transfer usage or more random data transfer usage) & the bottleneck in your system(system already having hdd/sata ssd or only 1 NVMe slot).
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https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9020660
Nicely explained with analogies. 👍
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9020708
🔥🔥🔥🔥
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9020902
Nice Info!
I tried to give you the Karma but saying, Oops, You cannot give karma again right now
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9020906
- Enable the Momentum Cache feature and make many SSD operations up to 10x faster?
is it useful?
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9020914
Drive0 - Good Health
CT240BX500SSD1 - CRUCIAL SSD
CT240BX500SSD1 - CRUCIAL SSD
Do you think my ssd is healthy ?
Current Firmware: M6CR013
| ID | Description | Attribute Data | Units |
|---|---|---|---|
| 1 | Raw Read Error Rate | 0 | Errors/Page |
| 5 | Reallocated NAND Block Count | 0 | NAND Blocks |
| 9 | Power On Hours Count | 4046 | Hours |
| 12 | Power Cycle Count | 4178 | Power Cycles |
| 171 | Program Fail Count | 0 | NAND Page Program Failures |
| 172 | Erase Fail Count | 0 | NAND Block Erase Failures |
| 173 | Block Wear-Leveling Count | 227 | Erases |
| 174 | Unexpected Power Loss Count | 144 | Unexpected Power Loss events |
| 180 | Unused Reserved Block Count | 100 | Blocks |
| 183 | SATA Interface Downshift | 0 | Downshifts |
| 184 | Error Correction Count | 0 | Correction Events |
| 187 | Reported Uncorrectable Errors | 0 | ECC Correction Failures |
| 194 | Enclosure Temperature | 44 | Current Temperature (C) |
| 196 | Reallocation Event Count | 0 | Events |
| 197 | Current Pending ECC Count | 0 | ECC Counts |
| 198 | SMART Off-line Scan Uncorrectable Errors | 0 | Errors |
| 199 | Ultra-DMA CRC Error Count | 1 | Errors |
| 202 | Percentage Lifetime Remaining | 85 | % Lifetime Remaining |
| 206 | Write Error Rate | 0 | Program Fails/MB |
| 210 | RAIN Successful Recovery Page Count | 0 | TUs successfully recovered by RAIN |
| 246 | Cumulative Host Sectors Written | 42712426257 | 512 Byte Sectors |
| 247 | Host Program Page Count | 1334763320 | NAND Page |
| 248 | FTL Program Page Count | 1582626976 | NAND Page |
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9020917
You can use a free software called crystal disk mark to measure the READ & WRITE performance of your SSD. To check if it matches the specs advertised by the manufacturer.
This is the diagnostic report of my GIGABYTE ssd, 1.5 years old. If you analyse the report you will notice the WRITE performance of this SSD is poor (maybe even faulty) , but it still works.
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9020923
shraaj wrote:Drive0 - Good Health
CT240BX500SSD1 - CRUCIAL SSDDo you think my ssd is healthy ?
Current Firmware: M6CR013
ID Description Attribute Data Units 1 Raw Read Error Rate 0 Errors/Page 5 Reallocated NAND Block Count 0 NAND Blocks 9 Power On Hours Count 4046 Hours 12 Power Cycle Count 4178 Power Cycles 171 Program Fail Count 0 NAND Page Program Failures 172 Erase Fail Count 0 NAND Block Erase Failures 173 Block Wear-Leveling Count 227 Erases 174 Unexpected Power Loss Count 144 Unexpected Power Loss events 180 Unused Reserved Block Count 100 Blocks 183 SATA Interface Downshift 0 Downshifts 184 Error Correction Count 0 Correction Events 187 Reported Uncorrectable Errors 0 ECC Correction Failures 194 Enclosure Temperature 44 Current Temperature (C) 196 Reallocation Event Count 0 Events 197 Current Pending ECC Count 0 ECC Counts 198 SMART Off-line Scan Uncorrectable Errors 0 Errors 199 Ultra-DMA CRC Error Count 1 Errors 202 Percentage Lifetime Remaining 85 % Lifetime Remaining 206 Write Error Rate 0 Program Fails/MB 210 RAIN Successful Recovery Page Count 0 TUs successfully recovered by RAIN 246 Cumulative Host Sectors Written 42712426257 512 Byte Sectors 247 Host Program Page Count 1334763320 NAND Page 248 FTL Program Page Count 1582626976 NAND Page
READ & WRITE speed test results not present in this report.
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9020944
This is the READ & WRITE test report from my ANT Esports SSD ( one of the cheapest ssd drives available online at the moment ) their performance report matches what is advertised by the company. Value for money. Performs better on tests, compared to the other branded overpriced SSD drive I am having.
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9020965
Only speed which matters is boot speed, baki are additional. Vu for this post paji
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9020967
teriab33 wrote:How much is cruciap bx and mx series speed compared to this? And what is price and storage size of ur ssd?This is the READ & WRITE test report from my ANT Esports SSD ( one of the cheapest ssd drives available online at the moment ) their performance report matches what is advertised by the company. Value for money. Performs better on tests, compared to the other branded overpriced SSD drive I am having.
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9020968
teriab33 wrote:Not doing rma paji?You can use a free software called crystal disk mark to measure the READ & WRITE performance of your SSD. To check if it matches the specs advertised by the manufacturer.
This is the diagnostic report of my GIGABYTE ssd, 1.5 years old. If you analyse the report you will notice the WRITE performance of this SSD is poor (maybe even faulty) , but it still works.
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9020975
Now, Tell me i am more confused?😞
Product Specifications
| SSD series - BX500 |
| Interface - SATA (6Gb/s) |
| Capacity - 240GB |
| Form factor - 2.5-inch (7mm) |
| Sequential Read - 540 MB/s |
| Sequential Write - 500 MB/s |
| SSD Endurance (TBW) - 80TB |
Warranty - Limited 3-year
|
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9020977
teriab33 wrote:You can use a free software called crystal disk mark to measure the READ & WRITE performance of your SSD. To check if it matches the specs advertised by the manufacturer.
This is the diagnostic report of my GIGABYTE ssd, 1.5 years old. If you analyse the report you will notice the WRITE performance of this SSD is poor (maybe even faulty) , but it still works.
Have you checked if other users also reported the same issue or not? I hope it's not a case of bait-and-switch. It's possible that your unit is faulty. I had put down the poor sustained performance of my Silicon Power NVMe SSD down to sub-par thermals in my Acer laptop but the replacement turned out to be as good as the expert reviews suggested.
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9020981
shraaj wrote:Now, Tell me i am more confused?😞
Product Specifications
SSD series - BX500 Interface - SATA (6Gb/s) Capacity - 240GB Form factor - 2.5-inch (7mm) Sequential Read - 540 MB/s Sequential Write - 500 MB/s SSD Endurance (TBW) - 80TB Warranty - Limited 3-year
Weird results as the BX500 is a SATA drive and can't exceed 600MB/s. Is there another NVMe SSD in the system?
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9020995
shraaj wrote:If you repeat such benchmark test within a short time or due to certain system factors/setting the test uses cached data instead of actual read write from the disk resulting in such anomaly. A good way to avoid this is by using a 8GiB test file size with 3-4 passes.Now, Tell me i am more confused?😞
Product Specifications
SSD series - BX500 Interface - SATA (6Gb/s) Capacity - 240GB Form factor - 2.5-inch (7mm) Sequential Read - 540 MB/s Sequential Write - 500 MB/s SSD Endurance (TBW) - 80TB Warranty - Limited 3-year
@LIMBO
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9021003
shraaj wrote:For ssd health, software like crystaldiskinfo are not much useful typically except in some rare circumstances where due to some firmware bug one see unusual write activity/wear level indicator value increase. It is much more useful for hdd where crystaldiskinfo is usually able to show signs of future trouble.Drive0 - Good Health
CT240BX500SSD1 - CRUCIAL SSDDo you think my ssd is healthy ?
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9021011
Expand
LIMBO wrote:The poor write speed on this ssd has not affected my day to day activities for which i use that laptop for, so not bothered with getting this GIGABYTE ssd replaced.Have you checked if other users also reported the same issue or not? I hope it's not a case of bait-and-switch. It's possible that your unit is faulty. I had put down the poor sustained performance of my Silicon Power NVMe SSD down to sub-par thermals in my Acer laptop but the replacement turned out to be as good as the expert reviews suggested.
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9021018
shraaj wrote:This is nothing but a "trick" to use system ram as a sort of cache to achieve a lage boost in short term read/write speeds & most likely the reason behind your bx500 anomalous result. Same kind of anomalous result can be achieved on samsung ssd by enabling their RAPID mode.
- Enable the Momentum Cache feature and make many SSD operations up to 10x faster?
is it useful?
@LIMBO
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9021194
teriab33 wrote:There are only 4 companies which make ssd chips, micron/crucial, samsung, sk hynix & kioxia. All other brands just use chips from one of these 4 companies.This is the READ & WRITE test report from my ANT Esports SSD ( one of the cheapest ssd drives available online at the moment ) their performance report matches what is advertised by the company. Value for money. Performs better on tests, compared to the other branded overpriced SSD drive I am having.
@kukdookoo
List of solid-state drive manufacturers - Wikipedia
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9021308
Expand
guest_999 wrote:When are you starting the 5th one,guessung?
There are only 4 companies which make ssd chips, micron/crucial, samsung, sk hynix & kioxia. All other brands just use chips from one of these 4 companies.
@kukdookoo
List of solid-state drive manufacturers - Wikipedia
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9021368
Expand
guest_999 wrote:
For ssd health, software like crystaldiskinfo are not much useful typically except in some rare circumstances where due to some firmware bug one see unusual write activity/wear level indicator value increase. It is much more useful for hdd where crystaldiskinfo is usually able to show signs of future trouble.
Now, its looking acceptable ! Thanks @guest_999
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9021390
After a long time find something good on dd.
Vu+kg
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9021402
It's not only the "written" speed you check in SSD.
Good post for newbies. But very little information hence misleading content.
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9021455
Excellent explanation
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9021577
👍
https://www.desidime.com/discussions/ssd-speeds-of-2000-3000-7000mbps-explained-why-they-are-misleading?page=1#post_9021670
Very informative 
and yes it's quite similar to
1.Putting Higher octane / Premium fuel in a vehicle with low compression engine.
2.Using 4K TV with a HD set top box.
3.Using USB 3.0 Flash drive with a device having USB 2.0 port.
and yes it's quite similar to1.Putting Higher octane / Premium fuel in a vehicle with low compression engine.
2.Using 4K TV with a HD set top box.
3.Using USB 3.0 Flash drive with a device having USB 2.0 port.
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@kukdookoo
List of solid-state drive manufacturers - Wikipedia
🔥🔥🔥🔥
This is the READ & WRITE test report from my ANT Esports SSD ( one of the cheapest ssd drives available online at the moment ) their performance report matches what is advertised by the company. Value for money. Performs better on tests, compared to the other branded overpriced SSD drive I am having.