Corsair Force 3 SSD runs at half speed (180MB) in iMac mid 2011

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I made a screenshot of system profiler:

I have the latest 1.9 EFI firmware for iMac mid 2011.

Also have the latest 1.3.3 Corsair Force 3 180GB SSD firmware.

The SSD was upgraded in Apple service. They have no idea why is it so slow, neither Corsair support...

I have tryed to do PRAM, because I read that it helped someone. Not to me...

The SSD is good, I tested on PC's SATA 3 port. The speed test punched my face with amaizing 550 MB/s speed.

I used ATTO Disk benchmark on PC, and Blackmagic Disk Speed Test on lion.

Any idea?

iMac (21.5-inch Mid 2011), Mac OS X (10.7.3)

Posted on Apr 10, 2012 5:30 PM

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Answer 1

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Hey! I reinstalled the system and ran some test again. I made clean install.

First I installed Lion on external drive, than I booted up and erased my Corsair SSD.

I ran speed test on external drive's Lion to avoid that test failure with read/write permission problems.

I used lloyd Disk Tester, because it was recommended by OWC.

I works fine, and has 501 MB/s on sequential read, and 480 MB/s on sequential write.

Blackmagic disk tester's results are misleading! Run lloyd Disk Tester if you want to get correct results.

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