I’ve had a look into the Drive .inf’s for 3.3.3.0 and 3.3.5.0 and for all intents and purposes I don’t think it affects anything in a major operational way.
However what is causing problems is I’m having issues on my windows 7 boxes with these November 2022 firmwares coming out of S3 sleep isn’t working even though ASM1166 is supposed to support the power management features, it kind of semi works if you use the Microsoft AHCI driver not the AsMedia one, but if I can’t solve anything I may have to return to the ECS06 firmware as sleep mode is important to me, and the Silverstone ECS06 one is purported to work (although I haven’t tested this yet). Obviously if I dowgrade the firmware back lower then I lose bootable capability and can only operate the card as data drives.
It would be useful to find out other peoples experiences with this. Is sleep and wake mode S3 working for you with these firmwares?
I haven’t tested Windows 10 yet but will at some point, and I might even have to swap in my 1062 and 1061 adapters to see if it’s a 1166 firmware/chip issue or just bugs with asmedia drivers.
My advice is be careful with flashing even though it may be tempting as it’s newer. There’s no change logs to show differences, and you may lose certain functionality that you had previously with no way to get it back, save buying a new one.