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2 Bronze
2 Bronze
73632

what is the speed rate of Dell SSD ?

Hi Team,

I got a chart of Dell for SSD speed rate as below:

Capture.JPG

from here you can see the rate is calculated by K, so how can i convert it to Mb/s ?

 

Thanks

 

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10 Diamond
73629

Class 10 vs 20 vs 30 vs 40 vs 50     2100K = 2.1 Meg

Posting Pictures Doesnt work All we see is a Triangle

The answer is not a one size fits all nor is it a sound byte.

Class

Sequential RW

Random  RW

Interface

10 Value

520K/320K

30K/10K

Sata

20 Mainstream

500K/300K

80K/60K

Sata

30 Performance

550K/350K

90K/75K

Sata

40 Performance

1500K/350K

200K/80K

PCI-E NVME

50 Performance

2100K/1200K

300K/100K

PCI-E CARD X4

 

Sequential = Boot, hibernate,  daily power up and down

Random = tasks such as file search:KIOPS

Typical SATA 2 speed is 250K

Typical SATA 3 speed is 500K

The faster speeds are usually 2 NVME drives in parallel RAID 0

X16  PCI-E cards can Get 8000K sequential speed.

https://www.seagate.com/files/www-content/datasheets/pdfs/nytro-5910-nvme-ssdDS1953-3-1801US-en_US.p...

 Sequential Read (MB/s) Sustained, 128KB                        8,150,000
Sequential Write (MB/s) Sustained, 128KB                          4,800,000
Random Read (IOPS) Sustained, 4KB QD64                          975,000
Random Write (IOPS) Sustained, 4KB QD64                          132,000
Random 70/30 R/W (IOPS) Sustained, 4KB QD64                  369,000

 


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Replies (6)
10 Diamond
73630

Class 10 vs 20 vs 30 vs 40 vs 50     2100K = 2.1 Meg

Posting Pictures Doesnt work All we see is a Triangle

The answer is not a one size fits all nor is it a sound byte.

Class

Sequential RW

Random  RW

Interface

10 Value

520K/320K

30K/10K

Sata

20 Mainstream

500K/300K

80K/60K

Sata

30 Performance

550K/350K

90K/75K

Sata

40 Performance

1500K/350K

200K/80K

PCI-E NVME

50 Performance

2100K/1200K

300K/100K

PCI-E CARD X4

 

Sequential = Boot, hibernate,  daily power up and down

Random = tasks such as file search:KIOPS

Typical SATA 2 speed is 250K

Typical SATA 3 speed is 500K

The faster speeds are usually 2 NVME drives in parallel RAID 0

X16  PCI-E cards can Get 8000K sequential speed.

https://www.seagate.com/files/www-content/datasheets/pdfs/nytro-5910-nvme-ssdDS1953-3-1801US-en_US.p...

 Sequential Read (MB/s) Sustained, 128KB                        8,150,000
Sequential Write (MB/s) Sustained, 128KB                          4,800,000
Random Read (IOPS) Sustained, 4KB QD64                          975,000
Random Write (IOPS) Sustained, 4KB QD64                          132,000
Random 70/30 R/W (IOPS) Sustained, 4KB QD64                  369,000

 


Report Unresolved Customer Service Issues
here

I do not work for Dell. I too am a user.

The forum is primarily user to user, with Dell employees moderating
Contact USA Technical Support


Get Support on Twitter @DellCaresPro


Diagnostics & Tools

8 Platinum
73620

Can't see your pic, but typically you divide by 8 (8 bits in a byte).


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73605

So it means for example:

 

20 Mainstream

500K/300K

 

 

 

-> The sequential rate is ~ 0.5Mb/s / 0.3 Mbps ?

Thanks

73570

Yes thats the typical SATA 3 speed for onboard controller.   Faster requires Raid where more than one drive at a time is running and typically  X2 X4 X8 X16 PCI-E.

Apricorn Velocity Solo X1 card is 500K max for example.

The Serial ATA (SATA) interface was designed primarily for interfacing with hard disk drives (HDDs), doubling its native speed with each major revision: maximum SATA transfer speeds went from 1.5 Gbit/s in SATA 1.0 (standardized in 2003), through 3 Gbit/s in SATA 2.0 (standardized in 2004), to 6 Gbit/s as provided by SATA 3.0 (standardized in 2009)

https://www.bhphotovideo.com/c/product/887344-REG/Apricorn_vel_solo_x1_Velocity_Solo_x1_SSD.html

PCIe 2.0 x1 slot with two SATA III (6 Gbps)

(backwards compatible with PCIe 1.0 x1 slot and SATA II & I)

 


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here

I do not work for Dell. I too am a user.

The forum is primarily user to user, with Dell employees moderating
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2 Bronze
2 Bronze
48715

If anyone is interested I benchmarked my Dell Class 35 (mainstream) 128GB NVMe drive in a 3070 micro and got the following:-

Dell Class 35 128GB SSD.jpg

It's definitely faster than a SATA SSD but also noticeably slower (higher latency and lower throughput) than top end NVMe drives I've used.

Full model number = KBG40ZNS128G NVMe KIOXIA 128GB and it uses Toshiba NAND chips.

27152

Class-35 appears to be DRAM-less SSDs, likely using QLC chips.  Tehy are PCIe, gen 3, and likely top our around the ~2200MB/s in the 512GB/1TB versions.

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