Adapting ATX PSU to A2000

[AmigaPixel]

OK I know I have been posting a lot about the A2000 but it is the big project I have been looking forward to for some time.
Anyway I will be replacing my failing A2000 PSU with an ATX and the adpater cable from Amgakit soon. Has anyone recently done this? I remember an Amiga user in Norway about two years ago if I recall, stating he had to use a backplate of of an ATX PSU to line up and mark where he needed to drill new mounting holes.

[AmigaPixel]

Yes very good points, come to think of it I have an old ATX sitting in the closet. I will compare it's width with the the Amiga 2000 PSU.

[AmigaPixel]

"If you do this, please take lots of photos & document your process!"

You bet!

[AmigaPixel]

since ATX PSU is smaller, I made 'feets' to fasten it. I also used tick generator (from aminet) instead of jumper and moved power switch.
iirc, some things don't work with jumper, like genlock.
have a look at my photo gallery.

Yes I see I will have to do the same thing, I also noticed that the screw holes on the ATX are slightly smaller than the ones on the Amiga PSU. The Amiga PSU is 6 7/8" wide and 4 1/4" High. Where as the ATX is 5 7/8" wide and 3 3/8" high.

[AmigaPixel]

When I did this back in the day, I just used the A2000 PSU shell and mounted the new PSU's internals in there.

Don't forget to move the tick jumper on the motherboard! :-)

Thanks I might try that.

[AmigaPixel]

You might want to look at:
http://www.ianstedman.co.uk/Amiga/amiga_hacks/Amiga_Power_supplies/amiga_power_supplies.html
The ATX power supply shown has a on/off switch so I think it is an AT supply.

Amiwest

No it is an ATX but an older one from around 2000 that is failing. It came out of HP Pavillion with a 1st gen Pentium 4 socket 423. Some of the older ATX supplies had an on of switch even though you still use Windows to shut it down.

Do all of the new ATX power supplies come with out an external switch? I have not bought one in a long time. I plan on buying a Seasonic from Newegg for $39. If they don't how do you turn the Amiga on/off? Does the adapter cable from AmigaKit have wire for switch?

[AmigaPixel]

The description states that the adapter comes with a switch:
 
http://amigakit.leamancomputing.com/catalog/product_info.php?cPath=39&products_id=998

Yes I just checked the Seasonic 300w at Newegg, I should have done that first. I am not sure about lining the switch up to the hole in the back.
Jope"s idea of moving the ATX components to the Amiga PSU shell sounds interesting but I am not sure I want to risk a chance of damaging the ATX parts.

[AmigaPixel]

Based on all the advice in this thread, moving the components is probably what I'd do. Alternatively if you're able to hack a smaller PSU into that same space I'm sure the case would appreciate the additional airflow around it.

 Good point, I think I will give that a try. I had been thinking of buying a modular psu to remove uneeded cables for better air flow. However if I move it to the Amiga psu shell maybe that isn't an issue. Or it could still be helpful. I might try your idea of a micro ATX PSU. Oh so many choices!