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Review: Newer Tech's iMAXpowr G4/433 CPU Upgrade
G4 CPU Upgrade for iMac 233 - 333MHz models
By Mike
Published: 7/19/2000
Hardware Features/Specifications/Compatibility
Intro | Benchmarks  | Appl/Game Tests | Software Controls  | Installation | Specs/Design | Summary
iMAXpowr G4 433MHz CPU Upgrade Technical Details

iMAXpowr G4 CPU Upgrade module

Hardware Details:

An original iMac CPU module is modified to use a replacement CPU and cache:

  • Motorola G4/450MHz CPU stepping 2.9
  • 1MB of Sync. Pipeline Burst SRAM L2 Cache running 216.5MHz
    Samsung KM736V799T-40 (4.0ns cycle time) x 2

Note: The G4 CPU is a 450MHz rated chip, but is running 433MHz in the iMac (the next speed up with the iMac's 66MHz bus speed would be 466MHz). Newer stated they underclocked the CPU to stay within the iMacs power/thermal budget.

Compatibility: (repeated from the front page)

The iMAXpowr G4 is compatible with the following iMac versions:

  • Apple iMac rev A through D (233Mhz, 266MHz and 333MHz models)

OS Version Compatibility:

Altivec support requires Mac OS 8.6 or later (OS 9.04 preferred). Newer Tech also notes the iMAXpowr is OS X compatible (they have beta tested it under OS X).

Test System Hardware Summary

  • Apple iMac rev A (G3/233)
  • 192MB RAM
  • Stock 4GB IDE hard drive (95% full)
  • Original CDROM drive
  • ATI RageII onboard video (6MB SDRAM)
  • iMac Game Wizard Voodoo2 card (using 3dfx B5 drivers)
  • All OS 9 Altivec extensions were enabled for G4 CPU tests
  • OS 9.04, VM off, QT 4.1,OpenGL 1.1.3, [No Libmoto]

The next page contains a summary and final comments on the product.

Index of Newer Tech iMAXpowr G4 433MHz Review

Intro | Benchmarks | Appl/Game Tests | Software Controls  | Installation | Specs/Design | Summary

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