At 03:35 PM 8/3/00 -0500, PaulT wrote:
>What I am wondering is what is the fastest CPU I could put in my ol' uVax 
>3300
>w/o having to buy new memory, etc...
>I've got a KA640-AA right now, I'd like to move up a VUP (without selling all
>the silver cups..arrghhh!)
>
>Anybody have a good source for data on this sort of thing?

That's easy, the best you can do is a KA660 (aka a VAX 4000/200 CPU). Not 
only does this CPU take you from 2.4 to 5 VUPs (more than double the 
speed), it uses the exact same cabinet kit (cab kit) and memory so you can 
just swap it out. It will address more memory however so a 4000/200 with 
64MB of memory really rocks. Once you get above the KA660 the CPU card is 
on a non-Q-bus connector. I'm fortunate in that I have both a BA440 with 
the 4000/200 back plane (all Q-bus) and one with the 4000/300 backplane 
(m-bus slots on the right).

Its still slower than the 4000/VLC (6 VUPS)

Unfortunately, everyone that has a Q-bus based VAX this is their best hope 
to make it as fast as possible before they retire it so KA660 cards are 
somewhat in demand. I found this out when I tried to buy one on the 
"dealer" market and was looking at $650 in no time. Fortunately I lucked 
into one.

--Chuck