My A1200 is doing great but I really want to squeeze in some more Fast RAM.

I'm thinking about either an ACA1221ec or an ACA1233n (because 128MB why not). I've heard the stock PSU may have issues powering an accelerator. Is that true? Are there are recommended third-party PSUs available up to the task?

(Ideally a US version for my PAL Amiga, but I have a step-converter so no big deal)

Last edited by remotenemesis on 30-Jun-2018 at 04:31 AM.

@remotenemesis

Power can be an issue I had to swap to using a 300W PSU on my old A1200 once I had a few extras attached to my motherboard. If you are using the accelerator on its own however I would be more worried about having adequate ventilation as I had to keep removing the trap door to let some air in. With the trapdoor cover shut I found my ACA1231 card locked up the system.

One of those laptop cooler mats will help here or a small mini fan to expel some air out

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@remotenemes

A500's PSU would be better than original A1200 PSU.

There shouldn't be power problems with 68030 cpu, at least if you are using CF card as hard drive.

@remotenemesis

Hi

We can assemble a high wattage PSU for you. Send us an email and we can look into it,

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@thread

Thanks for the advice. My planned setup is a stock A1200 with an Indivision, a CF as a hard-drive, PCMCIA CF adapter and one of the accelerators I mentioned.

I'll try this config and see if I have any problems.

@amigakit

Good to know! I'll definitely be in touch if I need a souped-up PSU. Thank you.

@remotenemesis

A1200 with Indivision AGA and ACA1221 card runs here on 3.0 A original PSU without issues. However when I've tried to connect a CD-ROM drive, power was insufficient.

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@remotenemesis

Ah !! Those were the days. I recall one Christmas back in 1995 when I first tried to install a 1GB 3.5 drive inside my A1200 with the GVP 030. The machine just refused to run the drive and I had to give up. I was advised to get an A500 heavy brick which has been attached to the computer ever since. She has the Blizzard Turbo 030 now SCSI KIT and the internal modest 2.5". I only ever really had a problem with the 3.5" drive and an Apollo 060... for that I used a Goliath.

The only issue I have with trapdoors is the ability to close the things with some of the cards. I've never had an issue just leaving it off, other than forgetting I had done so and had the thing hanging out the bottom when moving the Amiga.

scuzz

@scuzz

Hah good times.

Hope the New Forest is treating you well, I've spent much time there.

I Have a A1233n and it runs fine on standard A1200 PSU the heavy version. I also have run it with indivision card as well with no issues. I went of the indivision card as it is such a dog to configure right. Video to scart lead and a my Samsung TV do just as good a job. Only plus of indivision is 1024 x 768 but that really does need a 060 to be smooth.

Also switching screen modes on indivision in Pinball games for multiball is to slow.

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@remotenemesis

I had my A1200 with a Blizzard 1260+SCSI running with standard PSU for some time. Then I'd put some SCSI HDD in a AT tower, and took the advantage of more space to use an AT PSU to power it, using the original PSU cable -easier to carry one big box with all things inside instead several different boxes: PSU, HDD, CDRW, etc.-

Prior to this, I had a Blizzard A1230-IV @ 50Mhz, again with the original PSU, again no problems.

So I'd say it's safe to use the original PSU with the accelerators you mention…

Saluditos,

Ferrán.

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@remotenemesis

A1200, Blizzard 1230-IV, Indivision AGA mk2 (with fan), IDE-CF adapter, PCMCIA-CF adapter... all has been fine for years with the stock PSU here. As others have also said, there shouldn't be issues with this kind of setup with the original PSU. The problem comes when you try to add more drives (second HD, CD-ROM) to the setup.

Last edited by jPV on 05-Jul-2018 at 11:44 AM.

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Thanks everyone.

@remotenemesis

What I did before moving to a tower was what everyone then did, which was to convert an atx PSU and use that. I also provided power tonthr motherboard through a secondary input via the original floppy PSU power jumper. This meant that not all the power to the motherboard was through just one set of rails. This was for an 040 accelerator that used plenty of extra juice.

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Quote:

remotenemesis wrote: Thanks for the advice. My planned setup is a stock A1200 with an Indivision, a CF as a hard-drive, PCMCIA CF adapter and one of the accelerators I mentioned.

The A1200 PSU was constructed for a hard drive and an accelerator.

So if you are using a CF card and a 'weak' accelerator (no 040 CPU or PowerUP) you have lots of reserves.

@OneTimer1

Correction. It was designed for a 2.5 inch laptop drive and a ram expansion in the trapdoor. Only around 25W. A modest 030 accelerator card and 3.5 inch drive pushes it.

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Looking good! Thanks for the advice everyone.

Last edited by remotenemesis on 14-Jul-2018 at 06:08 AM.