Hi, all you Mac experts, Thanks to the six or seven of you who responded to my original memory problem of a few days ago, especially for the suggestion from several to turn off the "Startup Memory Tests" in the memory control panel (apparently a new feature in OS 8.6). Doing this cleared up my startup difficulties. Despite the probable differences in refresh rates (1k vs 4k?) between my preexisting 32 MB DIMMs and the new 128s, I installed the two 32s in slots A4 and B4 slots and the six 128s in the remainder slots, thus allowing interleaving. Other than some unusual whirring and high RPM sounds that first day, I've since experienced flawless performance and an apparently quiet and happy machine. RAMometer also reports nothing amiss, so it appears that I will keep these new DIMMs after all.
Other than increased memory, this PowerMac 7500 is "stock," with its PowerPC 601 putting along at 100 MHz, with 256k of external L2 cache. What upgrade(s) might now be considerd for this computer? I also have a Performa 6400/200, but use this slower but more stable 7500 as my primary Mac for editing music MIDI files. Now I would be interested in upping the speed to perhaps 250 MHz. Is that even advisable, especially with my nonstandard mix of 128 and 32 DIMMs? I also still wonder if it is a good idea to have the startup memory tests permanently disabled, or should one periodically (i.e., every six months or so) enable them for a quick test? Perhaps a monthly RAMometer's test is sufficient. After some period of stability, I may replace those last two 32s with 128s, thus upping the RAM out at 1024. While that seems downright gluttonous to me, I've always been told by the experts to "max out the RAM!" Once again thanks for the helpful advice. Keep it coming. I need all I can get! Greenfield __________________________________________________ Do You Yahoo!? Yahoo! Health - your guide to health and wellness http://health.yahoo.com -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | SPECIAL LIST PRICES - Apple PCI Video Cards from $19.99, MacOS 8.5 CD $79.99 Replacement Parts IN STOCK, Apple CDROMs from $19.99 <mailto:[EMAIL PROTECTED]> Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.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/pci-powermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
