SSD Write Speed Issue!

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Soldato
Joined
29 Dec 2009
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7,353
Having an issue with that I can't determine if it's SSD or Motherboard..

I've installed all the compatible drivers that are listed under SATA on the ASUS Drivers page here

Samsung 840 500GB SSD
ASUS Maximus VII Hero

SSD is connected to SATA 3 (6Gbps)

With all programs closed, using Samsung Magician I'm getting:
540 Read MB/s
90K Read IOPS
150 Write MB/s
25k Write IOPS

Drive Health Status is "Good"
Total Bytes Written: 53TB
The SSD is 2 years old.

Tried doing a long test using SeaTools - passed, no problem.

Here's the weird bit, I put the SSD in an existing server as a second drive, the OS being on the existing HDD. Benchmarked the SSD using SeaTools and got the full expected 330MB/s and 70K IOPS Write.

I've recently reformatted and re-installed Windows on this drive in an attempt to resolve the issue.
It currently has 380GB in Use, 80GB available.

Any ideas or advice before I try the following?
- Test new SSD on this board, install windows and fill up the drive a bit, then benchmark it.
- Run windows in safe mode and benchmark it.
 
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Don't quote me but SSDs slow down as free space diminishes and if it is being used. I.e your benching the drive and trying to maintain the OS.

Someone else will need to tell you whether the numbers you're getting are representative of what I've just said or whether you have a problem. The fact you've benched it with good numbers as a secondary drive suggests it's ok and benching with the OS is the problem.

Sorry I couldn't be any more help :(

Edit:

You could force TRIM to try to clean the free space.
You could also double check in a friends mobo
Ensure the SSDS is connected into sata 3 (I think you've mentioned that)
 
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Are you usingatest intel rapid storage technology?

I thought SSD's only slowed down a bit after they'd had loads of wear and needed repeated writes to the same cells?

Filling them up doesn't slow them down does it?
 
Yeah, using Intel RST and shows as functioning.

I've tried downloading the Evo restoration but it doesn't detect any drives (as mine isn't Evo :p )

Not sure how to force TRIM?

It's on the latest firmware and ASUS drivers that I could find.

I'll probably get round to testing a new SSD with windows/filled up with games etc next saturday.
 
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