First post, by ratfink
- Rank
- Oldbie
I have gathered some parts to put together an old 486. The motherboard I have does not of course have an ATX adapter so I'm interested in adapting an ATX PSU.
Of the 4 ATX PSUs I have, the oldest is a kobian-branded cheapie that came with a [new] cheap case. AFAIK this is the only one with all the ATX leads [it has a -5v rating on the label]..
I had three of these kobian's but only this one remains - one stopped working, and another became erratic... not a good sign but they were probably being over-challenged in the systems I had them in. The remaining one is rated at 280w so ought I think to run a 486.
Questions I have:
- This ATX PSU has been running a K6/3 system, using a GA5AX. Is that motherboard going to be OK with a more recent ATX PSU or would it need the -5v?
- I have a couple of extension cables for AT-AT and ATX-ATX. I was thinking of cutting these up and using a connector block to wire the AT-out to ATX-in plugs, so I can connect the PSU to the board. Obviously the voltages need to be correctly matched, but does the order of cables matter in any way [ie. any red 5v can go to any red 5v]? I was going to use these diagrams: http://pinouts.ru/Power/MotherboardPower_pinout.shtml and http://pinouts.ru/Power/atxpower_pinout.shtml
- What do I do about the orange "power good" 5v on the AT connector? Just a red 5v from the ATX supply?
Grateful for advice.