Question about using an ATX PSU

OldFoo · Post by **OldFoo** » Tue Dec 12, 2006 6:40 pm

Hi guys! So, I'm working on getting a Naomi setup and I'm considering using a micro-ATX PSU for now (since I won't have a cabinet for a long while). Anyway, I was just wondering if there are any specifications I should be looking at when picking out a PSU? Does wattage matter at all?

Would it be easier to rewire the power supply with the correct wiring and JST connectors, or should I just get one of the conversion wire harnesses mentioned around here?

I would prefer to have a small PSU with a built in power switch, so if anyone has any recommendations, feel free to post here or send me a PM! (By the way, I am located in the US.)

Thanks in advance!

OldFoo · Post by **OldFoo** » Tue Dec 12, 2006 8:02 pm

I use a conversion harness & a 300 watt ATX & its runs my Naomi 2 GD-Rom set-up fine.

OldFoo · Post by **OldFoo** » Tue Dec 12, 2006 8:16 pm

RGP wrote:I use a conversion harness & a 300 watt ATX & its runs my Naomi 2 GD-Rom set-up fine.

Thanks for the reply, RGP! Did you make your own harness, or did you purchase it somewhere? Does your PSU have a power switch or, if not, how do you deal with that? By the way, if you have any pics of your set-up, I'd love to see 'em!

OldFoo · Post by **OldFoo** » Tue Dec 12, 2006 9:05 pm

I got 1 of the 1's thats on ebay UK, the PSU comes on when power is inputted into it, no switch.

http://cgi.ebay.co.uk/Sega-NAOMI-PC-ATX ... dZViewItem

OldFoo · Post by **OldFoo** » Tue Dec 12, 2006 9:44 pm

So how do you power the GD-ROM drive? I only see the connectors for the Naomi mainboard...

Regarding the power supply itself: I don't need to worry about too much wattage--it's too little that would be a problem right? For example, a 500w power supply won't damage the system, will it?

I'm thinking of picking up one of these--I like the modular design so I don't have a bunch of cables hanging off of it: http://www.ultraproducts.com/product_de ... ductID=158

I found this one online for about $60. I could do without the chrome look, but oh well. I think they offer a 400w version as well that I would get if I can find it cheaper. Opinions?

OldFoo · Post by **OldFoo** » Tue Dec 12, 2006 9:50 pm

The GD-Rom kit should come with the "Y" lead.

OldFoo · Post by **OldFoo** » Tue Dec 12, 2006 10:28 pm

RGP wrote:The GD-Rom kit should come with the "Y" lead.

Is this the lead you're referring to? http://www.sega-naomi.com/forum/viewtopic.php?t=517

I was going to buy a full Naomi w/GD-ROM kit from ECL, do you (or anyone else) know what cables they include?

OldFoo · Post by **OldFoo** » Tue Dec 12, 2006 10:36 pm

Thats not the official lead but a custom job it should come with the 1 in the kit, like this 1 here:

OldFoo · Post by **OldFoo** » Tue Dec 12, 2006 11:59 pm

Ah... I see. Thanks for all your help!

OldFoo · Post by **OldFoo** » Wed Dec 13, 2006 12:13 am

brumma wrote:Regarding the power supply itself: I don't need to worry about too much wattage--it's too little that would be a problem right? For example, a 500w power supply won't damage the system, will it?

No, you don't have to worry about that. The official SUN psu is rated at 163w and it powers a full setup no problem. I think that if you get a 200w or 300w, that will be more than enough. Plus, at the 200w range, the psu's can be alot smaller. You won't get the small size with a 500w. I recommend an MATX (Micro ATX) type which are in the 200-300w range.

Check out the difference between SUN and MATX: