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

[mcastro199]

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.

 

[digitalgriffin]

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.

When you run performance monitor is the drive activity showing as 100%?

Could you have possibly changed NCQ (Native Command Queuing) which would affect what happens changes IOPS performance when multiple commands get queued? This setting is found in UEFI BIOS

Could it be anti virus interfering? I know for a fact that slows down my PCs as files get deep inspected.

 

[mcastro199]

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)