They are neither. DEC uses 80pin (not 72 pin) SIMMs in the 5000/20. The
extra pins are for parity. If you are interested I saw a few chips on
ebay for your system...

	Chris

Andrzej Wójkowski wrote:
> 
> Hi fellows!
> 
> I would like to ask, if anyone has any idea about the type of memory
> modules in DECStation 5000/20. Are they normal SIMMs or EDO SIMMs?
> Regards
> 
> Andrzej Wójkowski