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Poor 840 Pro Performance

Last response: in Storage
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April 7, 2013 9:39:27 AM

Hi,

Recently installed an 256 GB 840pro to replace a dead Kingston V100.
Clean install of Windows 7 home premium.
CPU: i7: 3820 @4GHz
MB: Asus P9X79 Pro
Memory : 16GB @ 1600 CAS 9
GFX : 480 GTX

The SSD is about half full, AHCI enabled in bios. But the speed test results are a lot lower than I was expecting, Random read : 52000 IOPS, Seq Write 184, Random Write : 28303

The writes are especially low (I did turn of AV before testing). It is plugged into 6Gb SATA connection. Trim enabled. Samsung magician set to performance. Can this just be down to the disk being 1/2 full? The write performance I get is not significantly higher than the Kingston drive which is 4 years old nearly.

Every other thread I've searched for its usually AHCI not enabled or plugged into a SATA 2 connector.

Any ideas?


Best solution

a c 529 G Storage
April 7, 2013 12:30:10 PM

Your motherboard has 4 SATA 3 (6Gb/s) ports.
Make sure your SSD is connected to one of the Intel 6Gb/s ports (SATA6G_1 or SATA6G_2).

If it is currently in SATA6G_1 then switch to SATA6G_2 and retest.
If it is currently in SATA6G_2 then switch to SATA6G_1 and retest.

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April 12, 2013 1:08:33 AM

Can't believe it was such an easy fix. Performance has now doubled. Stupid Marvell controller!
Thanks for the help.
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May 18, 2013 4:25:45 AM

apriest said:
Can't believe it was such an easy fix. Performance has now doubled. Stupid Marvell controller!
Thanks for the help.



Hello apriest,

I have the same ring with same problem !

What is the solution finally?
Which driver should I take?

Thank you in advance

Telmo

My result :-/

https://imageshack.us/scaled/medium/534/capturesamsung....
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May 19, 2013 2:19:20 AM

Dereck47 said:
Your motherboard has 4 SATA 3 (6Gb/s) ports.
Make sure your SSD is connected to one of the Intel 6Gb/s ports (SATA6G_1 or SATA6G_2).

If it is currently in SATA6G_1 then switch to SATA6G_2 and retest.
If it is currently in SATA6G_2 then switch to SATA6G_1 and retest.



Hello,

In my case, i have 2 ssd
one vertex2 3gb/s and one samsung 840 pro 6gb/s

in this case how proceed ?

See here the difference result:


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a c 529 G Storage
May 19, 2013 10:16:38 AM

What is your motherboard model?
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May 19, 2013 10:52:28 AM

Asus P9X79 Pro
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May 19, 2013 2:48:35 PM

OK now its good !

Just update Intel RST driver (iata_cd.exe) and software RST

Result:
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!