====== Amiga 1200 - Tower case PSU fan replacement ======

I've had this [[https://amigakit.amiga.store/|AmigaKit]] tower converted 1200 for a long time now; probably at least 10 years. I went off using it for a bit as the power supply that was included (a very, very basic ATX style thing) was horrendously noisy.

Finally, after [[blog:personal_diy_computer_shelving|properly sorting out]] the new [[blog:personal_diy_office|office]], I decided to do something about it in August 2020.


===== Case =====

It's a fairly basic case, obviously a modified AT design, with panel cut-outs for old fashioned serial and parallel ports, absolutely minimal cable management features, etc.

Still, there's plenty of room inside:

{{:blog:img_1684.jpg?400|}} {{:blog:img_1685.jpg?400|}} 

In there we have:

   * Blizzard 1260 68060 accelerator running at 72MHz
   * Blizzard SCSI IV 
   * Reset fix board
   * PS2 keyboard module
   * USB keyboard module
   * MicroMys PS2 module
   * 3.1 ROMS
   * CF to IDE reader in a 3.5" bay
   * Amiga floppy in the 3.5" floppy bay
   * HP 32x SCSI CD-ROM
   * Seagate Cheetah 18.1GB SCSI SCA drive with SCA to 8-bit adapter

{{:blog:img_1686.jpg?400|}} {{:blog:img_1688.jpg?400|}}
===== Power Supply =====

There's nothing special about it; it's a generic PC style ATX power supply, but a very cheap one. Not that an Amiga 1200 needs anything remotely special.

{{:blog:img_1689.jpg?400|}} {{:blog:img_1690.jpg?400|}} 

It's a very cheap power supply as it //doesn't even have a fan header// - it's soldered directly to the PCB. That will need some connectors adding.

{{:blog:img_1691.jpg?400|}}

.. and that's the fan. Yet again it's a bog standard 80x80x25mm 12v DC fan. There's all sorts of things to replace it with, but I'll probably stay with something like a basic Coolink or Noctua - nothing expensive.

===== New Fan =====

It's still not silent, due to the horrible design of the fan grill and the not-quite-cut-out-the-right-shape hole in the case for the PSU, but it's much better:

{{:blog:img_1717.jpg?400|}} {{:blog:img_1718.jpg?400|}}

===== Replacement PSU =====

**[Update - August 11th, 2020]**

Wasn't happy with the noise coming from the replacement fan, so I swapped the power supply with a Corsair CS450M instead:

{{:blog:cp-9020075-na-csm450_02.png?400|}}

With the 120mm fan and almost no load from the Amiga compared to the average PC, it's totally silent.