Naw...Most "servers" require ECC. Most servers accept ECC registered.
SOME servers required ECC registered. Of course, I am bundling in
all dual processor boxes that are putatively sold as "servers"
as servers. If you limit yourself to hardcore true server boxes
(you know what I'm talking about), then yes, most required registered
memory.
On the other hand, most personal use PCs will accept ECC memory
but ignore the ECC functionality. And most home PCs will NOT
accept registered memory...
Kwad