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Samsun 840 Pro Slow After Win 8 Install

post #1 of 4
Thread Starter 
Bought this SSD about 2 months ago. When I first installed it I did a bench with AS SSD and posted it on Samsung thread:



Yesterday I had to reinstall my OS Win 8 and ran the bench again with score around 750.

I ran WEI today and received a lower score :


What could have happened? Any ideas?

I followed Sean's Win 8 SSD install guide.

Thanks !
post #2 of 4
Download and install Samsung Magician V4. Then check to see if you've latest firmware installed. Then run the over-provisioning wizard and use at least 10% of available space. Then run the Optimize OS and Optimize SSD wizards.
Also check you have latest mobo drivers installed. When using the iaStor drivers they are very hit-n-miss. You might consider using the MS AHCI drivers instead.
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The Money Trap
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post #3 of 4
Your reinstall of Win 8, what did you do to prepare the 840 first?

Your new installation likely has caused:

Windows Write caching to be disabled, which seems to be a bug with IRST. Find your 840 in Device Manager, and in the Policies tab, uncheck Write caching and click OK. Go right back in and check Write caching and click Ok.

Using the same power plan with the new installation?

Optimized the OS with the Magician software?

Same Windows indexing settings?

CPU speed and power saving options were identical for both benchmark tests?

How full is your 840? How much free space? Same amount of Over Provisioning on the SSD, if used?

A SSD's performance will not remain the same throughout its life. It will decline at a rate depending upon its usage, more writing done, more performance decrease. Usually seen more in write performance, which we see is your case. The only way to temporarily reset a SSD's performance is with a Secure Erase.

I wouldn't worry about the new firmware, which is available, it's not a performance enhancement.

The AHCI driver in Win 8 is new, called storahci. I'm not saying it's better than IRST.
post #4 of 4
Thread Starter 
Quote:
Originally Posted by parsec View Post

Your reinstall of Win 8, what did you do to prepare the 840 first?

Your new installation likely has caused:

Windows Write caching to be disabled, which seems to be a bug with IRST. Find your 840 in Device Manager, and in the Policies tab, uncheck Write caching and click OK. Go right back in and check Write caching and click Ok.

Using the same power plan with the new installation?

Optimized the OS with the Magician software?

Same Windows indexing settings?

CPU speed and power saving options were identical for both benchmark tests?

How full is your 840? How much free space? Same amount of Over Provisioning on the SSD, if used?

A SSD's performance will not remain the same throughout its life. It will decline at a rate depending upon its usage, more writing done, more performance decrease. Usually seen more in write performance, which we see is your case. The only way to temporarily reset a SSD's performance is with a Secure Erase.

I wouldn't worry about the new firmware, which is available, it's not a performance enhancement.

The AHCI driver in Win 8 is new, called storahci. I'm not saying it's better than IRST.

Thanks for your reply. smile.gif I had done everything you said. I then resulted to updating firmware which improved things :


Still not there though, but close smile.gif


Edited by windowszp - 2/10/13 at 6:09am
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