Cheapest Registered ECC

And yeah, I just used Crucial as an example when pricing it out because the pricing is so readily available. I’d look at Kingston, Corsair and Crucial and pick the cheapest Registered ECC.

Personally, the memory is not something I would skimp on, some low latency PC3200 would be well worth the little extra cost.Sever memory is not like buying memory for your personal desktop.  Memory from all of those manufacturers is high quality and Registered ECC (and Chipkill if we’re talking Serverworks) matters much more than low latency (indeed, it’s usually required).  You may think that just because memory has a lower latency rating means it’s better but this is often not the case, in fact it usually means that the memory will fail faster, as it’s the same chips used for the higher latency stuff just running faster.  This is especially true in a server whose load on memory is much higher than that of a desktop.  Kingston, Crucial and Corsair sell memory for servers that is tested and qualified for the boards and are put through extreme testing cycles.  Crucial is really the best here and their extra cost is due to a more extreme testing regime, but Kingston and Corsair are both very close to that.  Crucial’s parent Micron in fact is the primary supplier to Sun Microsystems.  PNY, et all I would not put in a server - they’re just desktop memory and do not belong in a server.  The remainder of server memory is “generic” - Infineon and so on, rather than retail, and so should only be used by OEMs.

 
Onto latency and performance - the Xeons and especially the HT models couldn’t care less about latency - if they’re waiting for data from memory then they will just process something else.  The Opterons are much more latency sensetive, but of course latency is extreme right now anyway since Windows does not yet take advantage of NUMA except on IA-64.  Once Windows starts taking advantage of NUMA, which may take a while, then you will see Opteron performance skyrocket due to the lowered latency.
 
And finally, I’ll see what 2U’s with SCA I can find.  Windows Server 2003 iAMD64 should be around sometime in 2005 - probably the first half.

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