Why my new samsung ssd 850 evo slow ?

[congthanhgiong]

Dear all,

I have a new samsung 850 SSD evo 128 gb with windows server 2008 r2. I tried some speed test with HDTUNE and

http://thesz.diecru.eu/content/parkdale.php

All only give me a seq read @155 mb/s and 179mb/s for seq write. Why is it way slower than on other site performance tests ?

SSD should give at least 400 mb/s for read/write, shouldn't it ?

Do i have to tweak something on windows server 2008 R2 to get a better performance ?

Thanks all.
Nam Vo

 

[Elixer]

What is the motherboard, SATA II or SATA III?
Sounds like SATA II.
Also, are you in AHCI mode?

 

[Cerb]

http://www.anandtech.com/show/8747/samsung-ssd-850-evo-review/2

Write's about fine, really, but read may be slow. What happens with test programs like AS-SSD, or CrystalDiskMark? Even 3Gbps SATA should give a sequential read of 250MBps or more.

 

[r0n]

How old is the data on that drive? 840 EVOs have a tendency to chock down on a data that is few months old. I hope 850 evos are not having the same issue. I wont be surprised if they are. I don't trust TLC drives.

 

[congthanhgiong]

it's slow because the mainboard is old which only supports sata2. Now i switch to new mainboard, CrystalDiskMark shows dramatically faster

seq read: 510 mb/s, seq write: 511 mb/s

Happy happy now.

Thanks all.