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Intel SSD 520 Series 120GB Problem

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Last response: in Storage
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I have run the Intel 520 120GB as my OS drive(Win7 64bit) for a couple of months.

Recently, I've just tested it with Crystal Disk Mark 3.0.1, and the results showed that it only runs at 300MB read/write, which I believed that it is considered as very low since this Intel 520 should be in at least around 500MB.

Here's the screen shoot of the test results.

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My mobo is Asus Rampage Extreme 3 and I'm running the SSD on 6Gbps Sata in AHCI mode. (I've double check in the BIOS).

I've tried to change a new SATA cable and re-test it, but it doesn't change anything though.

May I know what caused this poor performance? Do I need to RMA my SSD ?

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cin19 said:
This is same as other X58 MB which use the Marvell SATA III port. It is slower SATA III that like a SATA II so that it limits SSD has high performance.

Check the link you will see what is going on. http://forum.crucial.com/t5/Solid-State-Drives-SSD/M4-o...

So you want to use the intel SATA II or upgrade your CPU/MB. But I will recommend to use the intel SATA II.


I see. Thanks for the information.

Btw, If I'm currently connecting my SSD (OS) to the Marvell 6Gb/s port with AHCI mode, can I just switch it to the Intel SATA 2 port instead of re-install windows? Will it crash? My SATA 2 is currently on IDE mode.
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cin19 said:
If you have been changed the AHCI in the BIOS, you just switch to the SATA II and it will work fine, because the BIOS controls all the functions of the MB.


So, it means I can just directly switch it to SATA 2 ( IDE Mode) without any issues ?

This means,

AHCI - > IDE = No Issue
IDE - > AHCI = Issue

Am I right?

When you set the AHCI in the BIOS, all the SATA port will be in the AHCI mode. There is no problem switch any SATA port.

I don't know what your means SATAII in IDE mode? Do you just set the AHCI for the onboard SATA6G controller? Or do you set the AHCI in the storage configuration?

If you switch from IDE to AHCI, the PC will not boot. And you can check the MSFT website for how to fix it.
http://support.microsoft.com/kb/922976

I don't know what your means SATAII in IDE mode? Do you just set the AHCI for the onboard SATA6G controller? Or do you set the AHCI in the storage configuration? said:
I don't know what your means SATAII in IDE mode? Do you just set the AHCI for the onboard SATA6G controller? Or do you set the AHCI in the storage configuration?

Yup. I mean I have set AHCI in the SATA6G controller.
So, it means I can just switch it to any other SATA2 port ?
Just to re-confirm.

If you switch from IDE to AHCI, the PC will not boot. And you can check the MSFT website for how to fix it.
http://support.microsoft.com/kb/922976 said:
If you switch from IDE to AHCI, the PC will not boot. And you can check the MSFT website for how to fix it.
http://support.microsoft.com/kb/922976

So, it means this will only affect the OS drive? If it is just a storage drive, then should be no problem when switching to each other?
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