02.10.2003 | 23:29
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Note on Early G5 Shipments and Problems with OEM + 3rd Party RAM Mixing - In a follow-up to the previous posting on 3rd party RAM issues (i.e. if no CL3 timing in the SPD) mentioned in Monday's news, a reader sent a note:
"Apple has sent a tech note to european resellers telling them about the RAM in the first units delivered in Europe, as described below. It seems it functions as is, but that when 3rd party RAM is added KPs (kernel panics) ensue.
I got it from a french web site (Macbidouille) who got it from a german web site( Macnews.de). Just thought you should know, since you have reported such problems (with CAS latencies) that might be related. Maybe we can have dual G5s running CAS 2 RAM !
Affected units
* 1.8GHz product serial number below CK339yyyPAZ, CK339yyyQ66, CK339yyyQ6Z, CK339yyyPB2, or CK339yyyQ68
* 1.8GHz CTO configuration product serial number below CK339yyyNVA
* 2.0GHz product serial number below CK339yyyPB0
* 2.0GHz CTO configuration product serial number below CK339yyyNVB
Units with serial number greater than CK339xxxxxx are not affected.
Units with serial number starting with YMxxxxxxxx are not affected.
The Dual G5 (USA shipment on 9/15) here has a S/N of "XB337...", so I wonder if this one is affected (i.e. is the letter prefix or just the first 3 numbers a key factor - the numbers I'd assume.) However it's working fine so far with two 3rd-party CL3 512MB PC3200 Dimms (no kernel panics to date but I don't get to use it as often as I like.) Apple has a kbase doc on locating the G5 S/N for those that want to check - remove the cover and it's on the lower area where the door mates to the case - Apple system profiler will also report it.
I wonder is this really an issue with the RAM shipped in them or the system/firmware of the early units? The boot rom version in this Dual G5 (s/n XB337...) per Apple System Profiler is: 5.0.2f2 (If anyone has later or different G5 boot rom version let me know.)
On a related note - a recent email from a G5 buyer said his Apple order listing shows "DDR440" memory instead of the usual "DDR400" listing. (Not that the memory bus is going to run at the higher speed.)