>>It was for a cache module DS. >> >Since the Mach 5 machines had cache on the processor card, they did not have the cache >socket installed on the motherboard. > > >The ROM SIMM socket was, however, installed on the motherboard, although it was never used. > >That brown socket is for the ROM SIMM.
The 8600 motherboards, *both* early and late, are "printed" for 10 DIMM positions: 1: DIMM 2: DIMM 3: DIMM 4: Cache DIMM 5: DIMM 6: DIMM 7: DIMM 8: DIMM 9: DIMM 10: ROM DIMM (*Never used*) All 10 are "stuffed" for early machines. Position 4 is not "stuffed" for late machines. If a socket is present here, the motherboard necessarily must be a /233 or slower. If a socket is *not* present here, the motherboard necessarily must be a /250 or faster. The "artwork" appears to be the same, although we know the processor slots are not identical, therefore there must be some subtle differences. A similar situation exists for the 9600s, except the cache is in chips soldered to the motherboard, not in a DIMM. These chip positions are not "stuffed" for late machines. If chips are present, the motherboard necessarily must be a /233 or slower. If chips are *not* present, the motherboard necessarily must be a /250 or faster. Mach 5 motherboards support /250, /300, /350 and /400, but /400 was never made. Because of the procesor card design, the bus runs at 50 on these machines. -- 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! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.shtml> --> AOL users, remove "mailto:"; 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/> iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
