2.Uncheck automatic startup of the cache.
•To avoid having problems with
3.Select “Advanced Options:
•Set the Cache control to the next highest Ratio. some set- tings are not available for some card as the setting would result in speeds much too high for the cache.
•Select “OK”
Setting the Cache Ratio for Maximum speed
4.Restart the backside cache
•In the main window, select “Enable Now”
•If you freeze at this point, then you have selected too fast of a setting for your backside cache. It is possible to adjust the CPU settings on the card to a slower setting, then using a higher ratio on the backside cache.
•Your system should be able to run memory tests such as TechTool Pro or DayStar’s PowerControl Testing software overnight consistently to operate at the higher speeds.
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Miscellaneous Performance Notes
•Many factors effect the performance of the CPU card. using high quality expansion products, cables and RAM will ensure that you have a system that can perform much faster with a “tuned” MACh Speed upgrade.
•Any speed can be set for any CPU, but a CPU will gener- ally only operate at 20% more than its manufacturer rated speed.
•Most of the logic boards supported by the MACh Speed have a maximum Bus Speed of around 50 MHz.
•The CPU operating speed and the cache operating speed are linked by the BUS speed on the card. The final oper- ating speed of each is determined by the its Ratio to the card’s BUS speed.
•CPU operating clock speed is determined by: BUS Ratio X BUS Speed = CPU speed in MHz.
•Once the MACh Speed G3 Upgrade Card is installed, the Motherboard Level 2 cache becomes a Level 3 cache. Since the Motherboard cache is smaller than the Level 2 cache, it will not add to the system performance. If possi- ble (as in the 8500/7500), you should remove the mother- board cache.
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