850 Evo Slow SSD speeds..

schpen

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Apr 3, 2011
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Okay, i've looked all over, and keep finding different things that can cause this.. so im not sure what exactly to do, i've tried a couple things cant seem to figure it out.. but I just got the Samsung 850 Evo.

> Disk Sequential 64.0 Read 363.15 MB/s 7.9
> Disk Random 16.0 Read 288.08 MB/s 7.9


And these are the speeds im getting. I am using a sata2 cable, thats plugged into the sata 3 port. Not sure if thats matters or not.

http://www.gigabyte.com/products/product-page.aspx?pid=4089#ov

This is my motherboard. I have 2 sata 3 connectors in the middle bottom, and 4 sata 2 on the right bottom. Its currently plugged into the 2nd sata3 cable in the middle bottom. I have all the correct drivers insalled to my knowledge..

One thing I noticed is my motherboard uses Marvel sata controller driver.. I've read that this doesnt work well with getting speeds over 400mb/s.. is this my issue?
 
Solution
One thing I noticed is my motherboard uses Marvel sata controller driver.. I've read that this doesnt work well with getting speeds over 400mb/s.. is this my issue?

This is exactly the issue.
Plug it into one of the Intel SATA ports. SATA2 0/1/2/3

I have one of those drives, plugged into a Marvell controlled port, and get almost exactly that same speed. The sister drive, plugged into a native port, gets the advertised speed.
Both 840 EVO 250GB drives.

Dark Lord of Tech

Retired Moderator



YES , Marvell controllers tend to be slower.

 

USAFRet

Titan
Moderator
One thing I noticed is my motherboard uses Marvel sata controller driver.. I've read that this doesnt work well with getting speeds over 400mb/s.. is this my issue?

This is exactly the issue.
Plug it into one of the Intel SATA ports. SATA2 0/1/2/3

I have one of those drives, plugged into a Marvell controlled port, and get almost exactly that same speed. The sister drive, plugged into a native port, gets the advertised speed.
Both 840 EVO 250GB drives.
 
Solution

schpen

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So I should plug my SSD into the normal Sata ports?
 

USAFRet

Titan
Moderator


Yes.