Is it good for you?
You do not had it full do you,you should only have SSD about 75% full as anything past that and they tend to really slow down.
Can you try it in another pc maybe you have a bad cable.Have you had any power outages or sudden shut downs as those can give ssd issues and cause corruption.
You might have to run a check on the disk as there could be some corruption
http://mashtips.com/ssd-health-test-and-performance-monitor-tools/
Also make sure you do these things as it will help your drive last a lot longer ..
https://www.maketecheasier.com/12-things-you-must-do-when-running-a-solid-state-drive-in-windows-7/
Also it could just be a bad cable or it could be a port,see if you can test it on another pc,again if you live in area with power issues you might want to get a UPS ..as power failures can really raise hell with an SSD.
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I have a 840 evo, works just fine not as fast as my other ssd but it is in no way slow
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I can't even use Samsung Magician
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I'm using 840 EVO on my MacBook since more than a year, always keeping it updated with latest firmware, and it's still working great.
Now I'm also using an 850 EVO on my Win10 PC and it's perfect here too. :)
840 EVO BTW had a bug were the speed will be decreasing over time if you don't update the fw. ;)
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i'm using a 850 evo and I HATE THEIR SOFTWARE !!! using windows 10 too so that's why
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I'm using SSD 840 EVO 120GB from over a year and I have NEVER encoutered any problems with it. It's flawless.
Also I don't know what is Samsung Magician, I never used it :P
EDIT: I mean really, this thread made me courious. The only think I did with my SSD was pluging it, installing Windows 7 64 and that's all. I never had anything like Samsung Magician on my PC and I don't bother myslef with their software or firmware upgrades :P
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I have a 850 evo on my pc and on my sister's notebook, no problems at all :3
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My old Samsung SSD 840 EVO 250 GB, have problem, it become very slow (to the point that you think it can't read some data written).
I upgraded to Samsung 850 Pro 256 GB (Brand New), I think less than a month,
just today I have problem reading a file (same as 840 EVO), until I restarted the PC.
How about your experience with Samsung SSD?
Solved Thanks to Tzaar : The problem is SATA cable, I changed it then it works, the speed back to normal.
Samsung Magician still error though, I'm using Windows 10 and Samsung Magician 4.7
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