@Franko:
I'll tell you about my experiences...
I have several "naked" A1200 motherboards. In my test, I power the A1200 motherboard through a 300W AT power supply converted to Amiga power plug. I have a hitachi 40gb 2.5" drive as well as a Seagate 80gb 2.5" drive which I both tried using on all of the A1200 motherboards. I use the standard short 2.5" cable to connect the hard drive.
The results vary...
In most cases, I need to hook up an extra 5V power feed to the floppy connector in addition to the regular power, in order for the drive used to spin up. If an accelerator is connected, then I definitely need to.
It's a hit and miss with various motherboards used for the test, but I think that these newer hard drives definitely require a bit more juice.
Funny thing is, I have no isses when using a standard A500 power supply with the above setup(s). It seems to provide sufficinet power always, no matter what revision of the motherboard I try with those hard drives, with or without an accelerator card attached.
