What support can Compaq offer on the Compaq ram?
Even you put non-Compaq ram into Compaq Server/PC, when you request on-site warranty, they will come to fix or replace the bad Compaq component despite of any non-Compaq stuff inside.
If you're the IT manager/support or your company has such person, you or he/she should know how to order a ram from Crucial or Kingston (they have memory selector and have gurantee on the ram to work on the system you specified, and lifetime warranty) and install it.
Even if in the future something goes wrong, Compaq's people came over and find out it's your non-Compaq ram died, you could just take it out and return to Crucial or Kingston.
Recently I bought a Kingston PC133 ecc reg 512M for ML330G2, costed about HK$1600=US$200. Compaq wants HK$5,616=US$700. If mail order from Crucial will be US$90 + $15 international shipping. Since there is local dealer for Kingston ram, so I prefer to pay more to buy local.