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Power Macintosh 7600/132 Processor Upgrade And Discussion Page - Performance Of Latest G3 & G4 Processor Upgrades

PowerMac 7600/132 Facts at a Glance

  • Processor: 604, 132 MHz
  • Bus Speed: 44 MHz
  • L2 Cache: 256K (Max 1 MB)
  • Installed RAM: 16 MB (Max. 1GB)* 
  • RAM Slots: 8, 168-pin DIMM
  • Min RAM Speed: 70 ns
  • Installed VRAM: 2MB (Max 4 MB)
  • Drive: 1.2GB
  • Internal SCSI: Fast SCSI 10MB per sec
  • CD Drive: 8X
  • Ethernet: AAUI, 10Base-T
  • Slots: 3 PCI
  • Drive Bays: 1 (3.5")
  • Supported MacOS: 7.5.3 - 9.x
  • Introduced: 8/3/96
  • Discontinued: 7/97
  • Initial Retail Price: $3,000
  • Current Price


  • *128MB DIMMs can be used, but have not been tested. 




The 7600/132 released in the summer of 1996 was a slight speed bump from the previous 120Mhz model which was itself the successor model to the popular PowerMac 7500. Aimed primarily at the business market, the 7600 was one of the last PowerMacs to use the 604 processor (which would soon become completely supplanted by the more powerful 604e.) The 132Mhz model was also one of the first Macs to sport the faster 8X CD-ROM drive, which was included in all PowerMacs released at the same time.

The machine also included a 256K L2 cache - expandable to 1MB, 16MB of RAM - expandable to 512MB using the provided 8 DIMM slots and 2MB of VRAM - expandable to 4MB for more colors at higher resolution. A 1.2 GB SCSI drive, on-board AAUI & 10baseT Ethernet and 3 PCI slots, rounded out the machine.

A PC compatibility card was an available option for the 7600/132.








Below you will find the MacBench 4.0 results for the current processor upgrades available for this machine. Results marked in blue  indicate that benchmark results were done by us. All other processor card results were provided by the upgrade manufacturer. The bar graphs below express results as a percentage of improvement over the base machine, which receives a score of 100%. Further down the page you will find a table with the actual MacBench score.

** Note that MacBench does not take advantage of the Velocity Engine (AltiVec instructions) of the G4. For AltiVec accelerated applications you can see a 1.5 to 4 times performance improvement over the G3, depending on the application and the functions you are trying to perform.

For G4 Application specific scores - Click Here

"But I thought that the G4 was so much faster than the G3?" In some cases it is! For G4 Application specific scores - Click Here

MacBench Absolute Scores

Processor Upgrade Card

MacBench 4.0 Processor Score

Power Macintosh 7600/132 251
Sonnet Crescendo G3/375/187/512K 1100
PowerLogix G3/350/175/1MB 1107
NewerTechnology MAXpower G4/350/175/1MB 1118
XLR8 MACh Speed G3/333/222/1MB 1150
Sonnet Crescendo G3/400/200/512K 1173
PowerLogix G4/400/200/1MB 1239
XLR8 MACh Speed G4/400/200/1MB 1259
PowerLogix G3/400/200/1MB 1265
NewerTechnology MAXpower G4/400/200/1MB 1278
Sonnet Crescendo G4/400/200/1MB 1290
Sonnet Crescendo G3/400/200/1MB 1294
XLR8 MACh Speed G3/400/200/1MB 1294
NewerTechnology MAXpower G3/400/200/1MB 1327
XLR8 MACh Speed G3/450/225/1MB 1370
PowerLogix G4/450/225/1MB 1394
XLR8 MACh Speed G4/450/225/1MB 1417
NewerTechnology MAXpower G4/450/225/1MB 1436
Sonnet Crescendo G4/450/200/1MB 1451
PowerLogix G3/500/200/1MB 1462
PowerLogix G4/500/250/1MB 1549
XLR8 MACh Speed G4/500/250/1MB 1574
Sonnet Crescendo G3/500/250/1MB 1617
XLR8 MACh Speed G3/500/250/1MB 1618
NewerTechnology MAXpower G3/500/250/1MB 1642