bloodem wrote on 2022-06-06, 12:12:
As for the PSU, not sure what "custom-rebuilt" means, but I would seriously consider going with a modern PSU + AT adapter. Those old PSUs were already very poorly designed + cheaply built, so after 20+ years they're just ticking timebombs waiting to go "KABOOM, RICO, KABOOM!". And when they do, other components (like the MB) are part of the usual collateral damage. 😀
Electrically it's an ESSUN branded PSU inside, not the original ASTI, which was much more crappier.
What I have done to it:
-replace all big caps - main caps, entire secondary side also replaced, all with newer caps - Rubycon mostly, though I had to resort to using some slightly less than ideal "Yang Chun" (Saturn logo) 470uF 16v caps in about two places because of the capacitor placement being a bit of an issue.
-upgrade rectifiers
-oiled the fan using bicycle oil -
-replaced most of the crummy molex wiring with new wires from two discarded Premier LC-C400ATX units
-upgraded secondary sillicon from the puny 8A on 12v and 16A on 5v - 5v now has 20A rectifier (would have gone with 30, but the silkscreen on the mobo and the holes don't allow for it.), and 12v has a 12A fast recovery rectifier.
So all in all, while not very substantial upgrades, I guess I have given it at least 10-15 more years worth of service. The only things I haven't done is upgrade the AC filtering side - I am out of safety approved Y capacitors (the disc kind of caps that go on the AC filtering) and I'm a bit confused as to how the common mode choke is currently wired - I want to change that one primarily because it's literally a candy coloured common mode choke that I doubt is very efficent. The only thing that's been changed was replacing the polypropylene film capacitor that was used as a X2 capacitor with an ACTUAL yellow X2 cap, and nothing else besides that.
This one was in a batch of about three PSUs that I had to fix. The third one still awaits parts, but the other two (this one and a Premier LC-8500BTX) I legitimately have spent about 6 hours or so (give or take) to completely make them decent units, especially the LC-8500BTX.
"Enter at your own peril, past the bolted door..."
Main PC: i5 3470, GB B75M-D3H, 16GB RAM, 2x1TB
98SE : P3 650, Soyo SY-6BA+IV, 384MB RAM, 80GB