> Apple lists the 7500 as having a 64 bit data path with a 50 MHz bus > speed, giving a theoretical data throughput of 50 MHz * 64 bits _ > 8bits/byte = 400 MB/sec. So by your reckoning, the RAM in these PCI > Macs was 1/3 the speed that the bus could have achieved, even with > the DIMMs interleaved? That's rather disappointing, but enlightening > for me. I always wondered why the numbers were so much lower than > the theoretical 400 MB/sec.
That's what the cache slot was for. The Power PC makes good use of cache, and 1M of 50 MHz RAM in front of the DIMMS did wonders for performance. Just like the 1M of 200 MHz RAM in front of the 50 MHz system bus on this Crescendo does... -- Unsupported OS X is sponsored by <http://lowendmac.com/> Support Low End Mac <http://lowendmac.com/lists/support.html> Unsupported OS X list info <http://lowendmac.com/lists/unsupported.html> --> 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/unsupportedosx%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
