2 Samsung EVO 840's SSDs running super slow

makeshiftdan

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Dec 16, 2014
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It seems I'm having some major issues with my 2 drives. (see tests below) I've done a lot of research into this and seems a lot of people were able to fix it in ways I am not. I've installed the latest firmware update from Samsung that "fixes" poor performance on older files. (Samsung Performance Restoration) I've checked to make sure the drive is hooked up to the correct sata ports. I've checked my bios to make sure the drive is in the correct mode. I've even put on of the drives on a separate controller (marvel controller) and still no luck. I've installed various drivers like "Intel Rapid Storage Tech" (crashed my computer) I feel like i've tried everything with no luck. Anyone have any ideas?

*Update*
One thing I did notice is that when i'm in safe mode the drive seems to perform MUCH better.


Computer info:
Windows 8.1
Asus Z9PED8 WS motherboard
2x INTEL, Xeon® E5-2650

Benchmarks:

AS SSD:
http://imageshack.com/a/img537/2283/xVJOLX.png
http://imageshack.com/a/img537/1896/bvaX4T.png

Samsung Magician:
http://imageshack.com/a/img537/8088/bvwA7V.jpg
http://imageshack.com/a/img905/8672/mXzt8u.jpg

Thanks so much for your help!
-Dan
 
Solution
I figured out a fix for mine.

Restart your pc
Enter Bios
Change the SSD Configuration from ACHI to IDE
Save & restart.

Let me know if that works for you as well.
Your Read speeds are decent; 86.8% of advertised on your 500GB EVO and 85% of advertised on your 1TB EVO. It's your Write speeds that are pretty poor.

Do you have the latest ASUS Win8.1 drivers installed (C600 Intel RAID version 3.8.0.110x)?
http://www.asus.com/Motherboards/Z9PED8_WS/HelpDesk_Download/


Also, your motherboard has a Server-grade motherboard/chipset, so it's possible the C602 chipset can't maximize the Read/Write speeds of current generation consumer-grade SSDs.

Also go into Device Manager, right-click on your drive, select "Properties", click on the "Policies" tab, and verify if "Enable write caching on the device" is checked.
 

makeshiftdan

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Dec 16, 2014
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Yup got all that covered. I've read some stuff about the motherboard having issues with Win 8. Might try a clean install of 7, but its a shame ill never know the issue :(
 

ZN2012

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Apr 2, 2013
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I figured out a fix for mine.

Restart your pc
Enter Bios
Change the SSD Configuration from ACHI to IDE
Save & restart.

Let me know if that works for you as well.
 
Solution