Want to switch from AHCI to IDE in Windows 10

osanna098 · Jan 5, 2016

I recently bought the Samsung 850 EVO 250GB and migrated my OS from the old HDD.
Then I did the registry hack and switched to AHCI. Since then I've noticed a considerable decrease in performance (in terms of boot up and running average applications). So I want to go back to using IDE.
I tried the registry hack again but this time it's not working.

rujoesmith · Jan 5, 2016

Normally you use the bios to switch between AHCI and IDE. I would revert the changes you made in the registry and consult your motherboard manual to find where the option is in the bios. On mine it is under Integrated Peripherals.

osanna098 · Jan 6, 2016

rujoesmith :

Thanks but i already Know that. The problem is when i change the value of the registry To setup for IDE (under pciide) and then restart, go to bios and switch From ahci to ide: it does not work, i get the BSOD.

CountMike · Jan 6, 2016

Something is wrong there, probably bad drivers for AHCI. IDE is no good for SSDs, AHCI should be faster and on IDE performance will start getting worse with time.

osanna098 · Jan 6, 2016

Ok that's something i didn't hear anywhere else. I've been googling a lot. I found out with ahci there are mainly 3 advantages: Hot plugging, ncq, trim. I don't need the first one and neither am i that hyped about ncq (helps with multi tasking as far as i know) but i need trim. So far i have not found any exact reference but im pretty sure windows 10 supports trimming ssd's in ide mode. So if trimming can be accomplished in ide then would the performance get worse with time?

CountMike · Jan 7, 2016

Yes trim is most important of all of those. If you are set as IDE now check disk optimizer and see if it's recognized as SSD.
You can also check if trim is anabled like this:
In command prompt type: fsutil behavior query DisableDeleteNotify
Results could be:
DisableDeleteNotify = 0 : TRIM is already enabled and working in Windows
DisableDeleteNotify = 1 : TRIM is not enabled
If it's 1 than you can try this:
To enable SSD TRIM support in Windows
fsutil behavior set DisableDeleteNotify 0
May have to reboot after.

osanna098 · Jan 7, 2016

I secure erased the ssd and used the hdd as the primary drive to boot with the ssd connected aswell in sata port 2. Went to optimiser and windows10 recognizes it as ssd and also i was able to trim it in ide mode. I'll try the other tests once i get back home. Thank you for the information.

Do i need to worry about any other problem associated with ssd in ide mode?

CountMike · Jan 7, 2016

If everything works right there's nothing else. Give it another test few month from now and in mean time see if proper AHCI driver for MB show up.
If it's AMD platform it will always be somewhat slower than on Intel which seems that all SSD manufacturers base their banchmarks on.

osanna098 · Jan 7, 2016

CountMike :

Yes I got DisableDeleteNotify = 0 in ide mode, it was already enabled. BTW I got the benchmarks of the ssd considerably higher in AHCI than IDE but then again in IDE mode the boot time and response time of all the applications is considerably better( it's really snappy!!). Therefore according to my point of view I don't see the use of higher benchmarks if I'm not actually satisfied with the everyday performance. Thanks again! and please let me know if you come to know about any other side effects to an ssd operating in IDE mode.

CountMike · Jan 7, 2016

Benchmark for 4K is most important for snappiness.

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