Slow SSD drive after two days????

I bought a new motherboard (p67) and a brand new x25-m Intel ssd drive. I installed it with RST drivers and ran ASSSD test and SandraSisoft. Both showed nice results (0.0.6ms, 258MB/s).

Two days later - access time 1ms, speed 248MB :/

trim is enabled (got 0 after typing the query command).

1. When I go to device manager in Windows, it shows Microsoft ahci drivers, even though RST is running in the background and e.g. As SSD recognizes that it is an Inter driver??? might it be the reason???

2. All I did in the last 2 days was SP1 for Win7

3. I have more thatn 50GB of free space on this HDD and ran 'quick check' using intel toolbox - no improvement...

I am worried that it will get worse and worse...

Any suggestions pls??? Thx!
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Duncan MeyersCommented:
It's the awful truth of SSDs. They go like stink when they're new and get progressively slower over time until they stabilize at their true performance. A quality SSD (read: expensive) will reach their true performance after between  3 and 8 hours of benchmarking. The time it takes for the performance to drop to steady state depends on the drive type (SLC v MLC) and the amount of reserve area. Curiously, the type and order of benchmark tests will affect results. That is; you'll get different results if you run random I/O teats then sequential tests as against sequential flowed by random. Wacky.

SNiA has some very interesting atticles about SSD performance at Go to the Education links.

You can also check this for yourself by resetting the drive which will restore the perfoamce.

Bottom line with SSDs is that you *really* get what you pay for.

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Duncan MeyersCommented:
Steady state performance will probably be around 50% of the initial performance.
m1979Author Commented:
Thx Meyersd, what about the driver? I think it is NOT ok, that I put RST and in device manager I can still see MS drivers?
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noxchoGlobal Support CoordinatorCommented:
Did you install Intel latest matrix storage driver during OS installation?
Go to Device Manager - right click on controller - update driver and point it to your latest driver.
m1979Author Commented:
No, it is Windows 7.

I installed Intel RST drivers after the installation of Windows to replace MS AHCI drivers...
noxchoGlobal Support CoordinatorCommented:
Try to use Update Driver option via Device Manager and point it to RST driver.
I don't really understand where you see a problem...

According to Anandtech's review (this one for example : ) you should have your X25-M g2 160GB reach about 255MB/s
==> 3% less performance means you may have some concurrent processes slightly using your SSD in the background. Regarding the 1ms latency, this is more sensitive...but I would suggest to redo your test
m1979Author Commented:
Thx, it stays on this level, so you were right Meyersd
Duncan MeyersCommented:
Thanks! Glad I could help.
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