[SOLVED] HELP! Samsung SSD 850 EVO 500GB - Randomly slowed down drastically

Dec 6, 2018
13
0
20
1
System Info:

CPU: Intel i5-7600 Kaby Lake
MoBo: MSI Z170A Gaming M5 (BIOS updated to Kaby Lake)
GPU: GeForce GTX 1070 Founder's Edition
Store: Samsung EVO 850 500GB
RAM: Corsair Vengeance 2400mhz DDR4 - 8GB x2
OS: Windows 10 Home 64bit
Cool: NZXT Kraken M22
Anti: McAfee Multi Access Anti Virus

I give up... I've tried everything.

About a month ago my SSD just randomly slowed down. I was getting really good speeds. It worked just fine.

My Sequential MB/s and Random IOPS reads were perfect. My computer was running smoothly since I got the SSD back in 2017.

But... now...

Seq. MB/s:
Read - 1,191
Write - 1,090

Random (IOPS):
Read - 20,751
Write - 12,695

I've tried everything. I've taken all the steps that other posts have suggested.

-SSD is only 20% full. (Uninstalled biggest games)
-AHCI is on.
-Rapid Mode is on.
-TRIM is on.
-Firmware is up to date.
-System restore is on.
-Defrag is on.
-Write Caching is on and set to Better Performance
-Power Option set to High Performance
-Boot up set to the correct drive
-Updated windows
-Samsung Magician is up to date.

Like I said. My computer was fine up until about a month ago.
 
Last edited:
Dec 6, 2018
13
0
20
1
Then that would be the second part of Post #19:
"Contact Samsung and see what they say to do. "

Holy sh*!... this whole freakin' time I thought that it was my SSD... It was my FREAKIN' CPU!

It was maxed out at .80ghz

I did everything but look at the damn CPU speeds.

IF YOU HAVE AN MSI BOARD (In my case the Z170a Gaming M5) do this:

Go into BIOS and disable Intel Adaptive Thermal Monitor under:

BIOS>Overclocking>CPU Features

If that doesn't work.

Check your Slow Boot Switch on your actual motherboard (Usually at the bottom of the board) and make sure that its switched to Normal (Left) and not Enabled (Right)
 

Crosslhs82x2

Respectable
Aug 12, 2017
590
64
2,140
38
I just uninstalled and reinstalled samsung magician which now is
Sequential
Read 529
Write 500
Random iops
Read 38330
Write 34423

But to the op why wood his have better seq's and lower on the iops
 
Dec 6, 2018
13
0
20
1
Rapid Mode is a mirage , just cache of memory. Disable it and see if it has really slowed to the true rated speeds of the SSD.
So, I disabled RAPID Mode and now i'm getting these speeds:

Sequential
Read - 532
Write - 513

Random IOPS
Read - 13,671
Write - 12,251

Ugh... Nothing is helping. Ive literally tried everything but completely restoring the system. I don't understand whats wrong. Maybe my SSD is damaged in some way?

Also, i've completely deleted all temporary files, emptied recycle bin and previous windows updates. My SSD is only using 125gb out of 466gb.

Interface is set at SATA 6.0gb/s and i'm using a SATA 3 cable.

It was literally running my IOPS at like 100k read and write speeds just a month ago.

I did a virus scan but it came out clean.

One other thing I was just thinking about is that I kind of remember it slowing down after doing a windows update. But i'm not entirely sure.
 
Last edited:
Dec 6, 2018
13
0
20
1
His numbers are all askew due to RAPID mode being on.
Can't really tell the actual drive performance with that still running.
See my reply to Dark Lord of Tech

I literally cant even open my web browser without it freezing for 10 secs and even as I write this to you my keys lag and freeze for a couple of seconds
 

USAFRet

Titan
Moderator
Mar 16, 2013
111,952
1,627
154,440
18,459
Assuming thisis your OS drive, I would do one of these:

Using Macrium Reflect or similar, create an Image of the whole drive off to some other storage space.
Run the Secure Erase function from Samsung
Boot from a Macrium Rescue USB, and port that Image back to the drive.
See what happens

or

Contact Samsung and see what they say to do.
 
Dec 6, 2018
13
0
20
1
So I went ahead and just reset the computer thorugh Windows since I did not really have much on it that I cared about.

My Random IOPS speeds are the same.............
 
Dec 6, 2018
13
0
20
1
As indicated in my post above, #19.
Yes.

It will absolutely and irrevocably wipe everything on that drive.
It may also return it to full performance.

So I did the Secure Erase...

Didn't work.

Could it just be my SSD? Should I try to go through Samsung to get the warranty?
 

ASK THE COMMUNITY