Do SATA PCIe cards benefit from IDE > AHCI mode conversion?

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PANDA125

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Feb 12, 2014
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Hello,

I just cloned my C:/ HD to SSD. During my research for different SSDs i ran into some topics about changing my SATA mode from IDE to AHCI for better performance. I checked my bios and my SATA settings are currently on IDE. Since this is my work computer, i'd love to squeeze out any performance improvements.

From what i understand, its s simple as modifying a registry value > Change SATA settings in Bios > Restart but, this is for your mobo's internal SATA, correct?

What about for SATA PCIe cards? Will i see any improvements there? I ditched my ,mobo SATA for the PCIe card because my mobo is from 2009 and doesnt support 6gbps speeds, the add-on card does.

Any helpful advise or suggestions for this process?

What i want to dot: Windows 7 > Change to AHCI mode from IDE mode:
http://www.overclock.net/t/1227636/how-to-change-sata-modes-after-windows-installation
https://www.youtube.com/watch?v=cY0vA4eOrS0

My system:
- Windows 7 / 64bit
- Samsung Evo 850

- ASUS P6T Deluxe Motherboard (Discontinued)
https://www.asus.com/us/Motherboards/P6T_Deluxe/
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131346

- SYBA / IOCrest SI-PEX40057 PCI-Express Card
http://www.newegg.com/Product/Product.aspx?Item=N82E16816124060&cm_re=si-pex40057-_-16-124-060-_-Product


Regards,
 
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SchizTech

SchizTech

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Jan 16, 2011
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Settings in the motherboard's BIOS wouldn't affect the mode run by the add-in card. Unless that has it's own BIOS setting utility at boot-up it would probably run in AHCI mode by default. The motherboard BIOS only affects drives plugged into it's ports.
 
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Solandri

Solandri

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Jan 4, 2012
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You want to run SSDs in AHCI mode. AHCI enables NCQ, which allows the drive to process multiple requests simultaneously. In IDE mode it handles one request at a time. With small file read/writes, the drive can find the data faster than it can send it back to the computer, so IDE mode results a max of 30-70 MB/s read/writes. With NCQ enabled, if the computer makes multiple simultaneous small file requests (queue depth of 2 or more), it can usually hit 200-300 MB/s.

So yeah, figure out a way to get that SATA connector card to operate in AHCI mode. My guess would be that it's always in AHCI mode.
 
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PANDA125

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Feb 12, 2014
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Thanks guys!

I have Storage opened right now on Speccy but i dont see anything that says "AHCI" anywhere.

I dont know if this means anything but under "ATA Standard", i see "ACS2". Under "Interface", i see SATA.

Where should i be looking?


 
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