There a lot of benchmarks of NCQ drives at http://www.storagereview.c
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Dell Dimension 8400, Windows XP Pro, AHCI vs ATA
I have a Dell Dimension 8400, which came with Windows XP Home pre-installed. I wiped it, and installed my own copy of Windows XP Pro, but to do so I had to change the BIOS disk (SATA) settings from "RAID Autodetect / AHCI" to "RAID Autodetect / ATA". If I remember correctly (it was about a year ago) the Windows setup would keep crashing until I changed it to ATA.
My question is: does this have a negative performance impact on disk performance, or is it just a different interface. Thanks.
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by: garycasePosted on 2006-12-10 at 09:18:10ID: 18111195
The AHCI (Advanced Host Controller Interface) enables the SATA hot plugging and NCQ (Native Command Queuing) features => but makes NO difference in the data rate between the controller and the drive. So there's most likely NO performance difference on your system. The exception is if you have an NCQ drive => and even then the difference in performance on a typical desktop is unlikely to be noticeable.
... Bottom Line: You're fine the way you've set it up :-)