I have a BWG3 400 rev 2, OS 904, 768mb RAM [2 x 256mb, 2 x 128mb]. This machine has a system bus speed 100MHz. 1. Does the requirement to have the RAM DIMM specification "PC 100" have any relation to the system bus speed of 100 MHz or is it coincidence that the two numbers are the same? Now I have questions about two of my 128mb DIMMs. I have checked both DIMMs indidually with TechTool Pro Standard RAM test and they both check out OK. I have also checked them all with Gauge Pro for performance speed and with DIMM First Aid 1.1. It is the last two tests which produce differing results. 2. The first 128mb DIMM has results: from DIMM First Aid: PC100-133. _Has minor problems in that "SPD data revision is old or incorrect"_. Timing is shown as 7.5ns [which accords with the markings on the DIMM]. The Gauge Pro performance speed is shown as 94.7 MB/sec. I understand the DIMM speed rating of 2-2-2,3-3-3, etc but have never before seen 1-3-3. Any ideas what this means? If this is meant to show that the DIMM is faster then why is the Gauge Pro speed lower than the second 128 DIMM? 3.The second 128mb DIMM has results: from DIMM First Aid: PC66 - 222 [altho there are two little white stickers on the DIMM both claimimg PC100 and one of them has a Motorola logo]. Timing is shown as 10.5ns. [No timing marking on the DIMM.] The Gauge Pro performance speed is shown as 101.5 MB/sec I know that my machine will happily use PC100 and PC133 RAM but what about PC66? Why does the timimg speed show 10.5ns? If this a result of the DIMM speed being PC66 then that would suggest that the DIMM is incorrectly labelled as PC100? The DIMM was purchased from a reputable dealer from whom I have previously bought RAM. Why is the Gauge Pro performance speed result different for both DIMMs? All four DIMMs are working fine - memory check on startup is OK, TechTool Pro RAM tests are OK. The computer operates OK. I accept that the human eye [mine anyway] can not distinguish between 7.5 and 10.5 nanoseconds or between 94.7 and 101.5 MB/sec transfer speeds, but I would like to resolve this discrepancy. Any advice here appreciated. I am beginning to think that maybe DIMM refers to me and not the computer! Peter Sealy Victoria, Australia Any speling errors in this document are due to software bugs -- G-List is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- We have Apple Refurbished Monitors in stock! | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> G-List list info: <http://lowendmac.com/lists/g-list.shtml> Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/g-list%40mail.maclaunch.com/> Using a Macintosh? Get free email and more at Applelinks! <http://www.applelinks.com>
