I have got an old SB 150 at home but, alas, without RAM, so I'll need
to get some. However, the Sun System Handbook only says:

,----
| Four DIMM slots, PC133 168-pin JEDEC DIMMs
| 128-, 256-, and 512-MB DIMMs; DIMMs can be mixed and matched
| 2-GB maximum (with four 512-MB DIMMs), error correction SDRAM
`----

which could be taken to mean that /in principle/ all ECC PC133 SD-RAM
DIMMs up to 512MB should work, but I remember that the SB 1[05]0
systems really were quite particular about RAM. Does anyone on this NG
know if

- CL2 is required?

- or else, if not required, will CL2 RAMs actually driven at that
timing if installed? (i.e. will CL2 be faster or just a waste of
bucks?)

- unregistered RAM is right (I would think so, it's a /workstation/
after all...)

- there are any other important contraints to be aware of?

Thank you,
Stefan


--
Stefan Jankowski
s/spambucket//
s/dave\.null/${FORENAME}.${FAMILYNAME}/

Hi,

Stefan Jankowski wrote:
> I have got an old SB 150 at home but, alas, without RAM, so I'll need
> to get some. However, the Sun System Handbook only says:
>
> ,----
> | Four DIMM slots, PC133 168-pin JEDEC DIMMs
> | 128-, 256-, and 512-MB DIMMs; DIMMs can be mixed and matched
> | 2-GB maximum (with four 512-MB DIMMs), error correction SDRAM
> `----
>
> which could be taken to mean that /in principle/ all ECC PC133 SD-RAM
> DIMMs up to 512MB should work, but I remember that the SB 1[05]0
> systems really were quite particular about RAM. Does anyone on this NG
> know if
>
> - CL2 is required?
>
> - or else, if not required, will CL2 RAMs actually driven at that
> timing if installed? (i.e. will CL2 be faster or just a waste of
> bucks?)
>
> - unregistered RAM is right (I would think so, it's a /workstation/
> after all...)
>
> - there are any other important contraints to be aware of?
>
> Thank you,
> Stefan
>
Why not buy it from Crucial, they have it and it works!

It should be atleast CL3, if its faster it should not cause a problem.

But PLS be aware that memorys are identified by a small memory on the
DIMM which the Openboot/BIOS reads and must recognise.

So having the latest Openboot could be important!

Also, the Sun is abit kinky on the DRAM since PC133 only specifies a
maximum of three DIMMs on a single memory bus, Sun has pushed that in
order to have 2GB 4 psc. so not all DIMM may work fine.

/michael