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System 7.6.0 benchmarks

We have benchmarked the effect of L2 cache size on a 6100 using System 7.6.0 in a Power Macintosh 6100. The results are given below. Using Ziff-Davis' MacBench® Ver. 3.0, our L2 Company 256K and 1024K cache cards gave the following results in a 6100/60 running System 7.6.0:

Speed increase over same machine with no cache installed:

                          256K     1024K
_______________________________________

Processor:                38%       75%
Graphics Mix:             33%       65%
Publishing Graphics Mix:  36%       90%

QuickDraw Routines:       
Copy Bits:                43%       72%
Text:                     58%       95%
Lines:                    45%      109%
The above results were obtained with the following configuration, and should be repeatable:

CPU: Power Macintosh 6100/60, L2 256K or 1024K cache installed, 16 MB DRAM, disk cache set to 96KB (default), VM 17MB, 730 MB Quantum Lightning hard drive, monitor = 14" Macintosh Color display, using standard DRAM motherboard video, set to "thousands" of colors (16 bit), using a freshly installed System 7.6.0.


As can be seen by the above benchmarks, a 1024K cache can substantially outperform a 256K cache in many operations, especially graphics. This is because in machines using DRAM based video, a 1024K cache can store the 600K of DRAM used for screen memory for higher speed screen redraws, and still have 400K "left over" for instructions and data.


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