Question Samsung SSD 860 QVO 1 TB extremely slow write speed

Mar 12, 2021
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Hi there,

for the past week or so I have had various performance problems with my computer and have looked everywhere for a fix.
Today, I've run a performance benchmark for my SSD in the Samsung Magician software and noticed my sequential write speed was only 67 MB/s (while my read is around 500 MB/s).
(Random read-write benchmarks at ~34k IOPS read and ~20k IOPS write).
I bought the SSD around 1.5 years ago and have had performance problems multiple times, mostly solving them short-term by plugging into a different SATA3 port on my motherboard every time.
So my first instinct was to check if the drive was plugged into a SATA3 port correctly, so I've switched SATA cables and verified that it's plugged into a SATA3 port.
The SSD is running the newest firmware version.
Currently, there are about 500 GB of free space on the drive and there is a dual boot version of Kali Linux installed on the same SSD.

I'd appreciate any help.

Thanks
Paul
 

Bob.B

Prominent
Feb 8, 2021
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107
590
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Hi there,

for the past week or so I have had various performance problems with my computer and have looked everywhere for a fix.
Today, I've run a performance benchmark for my SSD in the Samsung Magician software and noticed my sequential write speed was only 67 MB/s (while my read is around 500 MB/s).
(Random read-write benchmarks at ~34k IOPS read and ~20k IOPS write).
I bought the SSD around 1.5 years ago and have had performance problems multiple times, mostly solving them short-term by plugging into a different SATA3 port on my motherboard every time.
So my first instinct was to check if the drive was plugged into a SATA3 port correctly, so I've switched SATA cables and verified that it's plugged into a SATA3 port.
The SSD is running the newest firmware version.
Currently, there are about 500 GB of free space on the drive and there is a dual boot version of Kali Linux installed on the same SSD.

I'd appreciate any help.

Thanks
Paul
Run a pass of crystal disk info......post a screen shot of the results.
 
Mar 12, 2021
6
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10
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The only thing I see there is C7.....crc errors.
Reseat the sata cable....both ends.... and see if that number continues to climb.
Thanks for looking into it.
I think I fixed the issue by TRIMming the SSD and enabling RAPID mode, now my Read/Write speeds are >3000 again.
Just if anyone who sees this happens to have a similar issue.
 
The QVO units are optimized for reading and price. Not for write performance.
Once the write buffers are filled continuous writing will have to proceed at the speed of the nand blocks.

What is the nature of your performance issues?
I suspect your problem lies elsewhere.
What is the make/model of all of your parts?
 
Mar 12, 2021
6
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10
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The QVO units are optimized for reading and price. Not for write performance.
Once the write buffers are filled continuous writing will have to proceed at the speed of the nand blocks.

What is the nature of your performance issues?
I suspect your problem lies elsewhere.
What is the make/model of all of your parts?
Hi,

the most obvious performance problem has been sudden computer reboots (mostly during games, but nothing really demanding).
I've also had all-around low frame rates and graphic glitches.

I recently messed around with partitions on my SSD to install dual-boot Kali Linux for work, I have had no errors or problems during that process.

I have already attempted the following:
Swap SATA cables on my SSD
Clean GPU driver reinstall
Full memtest run, no errors
CPU & GPU stress tests that showed no extreme temperature
Plugging GPU into the second PCIe Slot and cleaning my case of any dust

This is my hardware list:
Motherboard - ASRock B450 Pro
GPU - Radeon RX 580
CPU - AMD Ryzen 7 2700
RAM - 2 x 8 GB DDR4-2400 Corsair Vengeance LPX
Drive #1 - Samsung SSD 860 QVO 1 TB
Drive #2 - WD10 1 TB HDD
PSU - 500 W be quiet! System Power 9 Non-Modular 80+ Bronze

Thanks for your help!
 
Last edited:
Games will increase the demand on the rx580 and the consequent need for power.
My guess would be a psu issue.
550w is recommended for the RX580:
http://www.realhardtechx.com/index_archivos/Page362.htm
On this list, your psu is tier 4:

See if you can test with a known good quality psu of at least 550w.
 

Bob.B

Prominent
Feb 8, 2021
878
107
590
12
Hi,

the most obvious performance problem has been sudden computer reboots (mostly during games, but nothing really demanding).
I've also had all-around low frame rates and graphic glitches.

I recently messed around with partitions on my SSD to install dual-boot Kali Linux for work, I have had no errors or problems during that process.

I have already attempted the following:
Swap SATA cables on my SSD
Clean GPU driver reinstall
Full memtest run, no errors
CPU & GPU stress tests that showed no extreme temperature
Plugging GPU into the second PCIe Slot and cleaning my case of any dust

This is my hardware list:
Motherboard - ASRock B450 Pro
GPU - Radeon RX 580
CPU - AMD Ryzen 7 2700
RAM - 2 x 8 GB DDR4-2400 Corsair Vengeance LPX
Drive #1 - Samsung SSD 860 QVO 1 TB
Drive #2 - WD10 1 TB HDD
PSU - 500 W be quiet! System Power 9 Non-Modular 80+ Bronze

Thanks for your help!
....cleaning my case of any dust...
Did you also clean the psu?
 
Mar 12, 2021
6
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10
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Hi all,

thanks for your replies.
I will try to get my hands on a higher-watt PSU and test that out.
Bob, I have not felt confident cleaning the PSU yet since I don't really know how to do that and don't really want to open it. If you have any good advice for how to safely clean it, I would appreciate it.

Thanks
Paul
 

Bob.B

Prominent
Feb 8, 2021
878
107
590
12
Hi all,

thanks for your replies.
I will try to get my hands on a higher-watt PSU and test that out.
Bob, I have not felt confident cleaning the PSU yet since I don't really know how to do that and don't really want to open it. If you have any good advice for how to safely clean it, I would appreciate it.

Thanks
Paul
Don't open it.
Get a can of compressed air and give the psu a few shots from both directions.
You might be surprised how much dust gets blown out.
Perhaps take the screen guard off the fan so you can use a small brush on the fan blades.
 
Hi all,

thanks for your replies.
I will try to get my hands on a higher-watt PSU and test that out.
Bob, I have not felt confident cleaning the PSU yet since I don't really know how to do that and don't really want to open it. If you have any good advice for how to safely clean it, I would appreciate it.

Thanks
Paul
Higher wattage is not as important as higher quality.

A psu normally does not accumulate sufficient dust to require cleaning.
If you do clean, use canned air. When you do, immobilize the psu fan so that it does not spin and damage itself.
 

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