I have a total of 4 boards that I want to see how far they can go with bus speed. So far, I have only tested one (a 7300/200). I will test the 8600/250 next, and once I do something about a PSU, I can test the 7600 and 9500.
Currently still working with the 7300. All memory slots are filled, and memory is interleaved. All RAM is 60ns EDO RAM. CPU is a ZIF carrier with under-clocked G4 and oversized heatsink. Here are my observations so far:
60 MHz - No boot
58 MHz - Boot not guaranteed
57 MHz - Always boots, but usually get data read errors using Stuffit Expander
55.6 MHz - Seemed fine until I went to install Mac OS 9 (from one ZuluSCSI partition to another). I got an error 'problems were encountered reading the source file "Installation Tome". Installation cannot continue'
54 MHz - Same as above
53 MHz - Made it further into the install, but got a different data read error
52 MHz - Works great
So here are my questions:
1) Are these valid correlations I have made?
2) If so, is there a memory tester for OS 9 that works as well as running the OS installer?
3) Should I worry about individual 60ns EDO modules not being able to handle up to 60MHz bus speeds?
4) Should I worry about PCI cards or SCSI devices restricting bus speed?
I might try un-interleaving the RAM, but I really don't want to go as far as testing individual memory modules unless I am convinced that they are not keeping up with whatever they are spec'd to.
Currently still working with the 7300. All memory slots are filled, and memory is interleaved. All RAM is 60ns EDO RAM. CPU is a ZIF carrier with under-clocked G4 and oversized heatsink. Here are my observations so far:
60 MHz - No boot
58 MHz - Boot not guaranteed
57 MHz - Always boots, but usually get data read errors using Stuffit Expander
55.6 MHz - Seemed fine until I went to install Mac OS 9 (from one ZuluSCSI partition to another). I got an error 'problems were encountered reading the source file "Installation Tome". Installation cannot continue'
54 MHz - Same as above
53 MHz - Made it further into the install, but got a different data read error
52 MHz - Works great
So here are my questions:
1) Are these valid correlations I have made?
2) If so, is there a memory tester for OS 9 that works as well as running the OS installer?
3) Should I worry about individual 60ns EDO modules not being able to handle up to 60MHz bus speeds?
4) Should I worry about PCI cards or SCSI devices restricting bus speed?
I might try un-interleaving the RAM, but I really don't want to go as far as testing individual memory modules unless I am convinced that they are not keeping up with whatever they are spec'd to.