First post, by Hatta
wrote:The difference between modern systems and the Socket A machines of yore is that current machines take the power for the CPU from one of the +12V rails, while Socket A boards use +5V instead.
PSU designs have changed accordingly over the years: A good PSU from 10 years ago can deliver >30 Amps on +5V, modern ones usually max out at about 20 Amps, which is barely enough to power a 70W CPU plus all the other stuff running from +5V.
So what does one do when replacing a power supply on a Socket A machine? I have one that needs a new PSU. It's got an XP 2800 in it, which would meet that 70W draw. Plus I have a 6600GT in there that needs Molex power. Not sure if that draws 5V or 12V.
Is it better to try and source a vintage power supply for these machines? Would a modern PSU with 25A on 5V be OK? Should I try and repair my current PSU? For all I know it may just need a recap. Would it be crazy to use the 12V supply with a voltage regulator?