Hopefully he didn't expect to get 2 MB (+512k on board) out of that configThe 700, 900, and 950 can "use" 512k modules, but will only read 256k of reach one.
According to the Apple Memory Guide, very few of the Quadra/Centris line utilize 512k modules, but a IIvx/vi can?? 605/475 also do. I read somewhere this was a limitation within the ROM, but you'd think as the 90s went on higher on-board color density at "desktop publishing" resolutions might've been desired, especially on the flagship or higher end machines that could handle it... But maybe there's another technical limit the
I picked up a non-functioning, yellowed, but clean looking Quadra 630, not sure yet the extent of it’s issues but it’s motherboard def looked like the capacitors have leaked, looks better after an ultrasonic cleaner bath:
On to replacing with tantalums...