Socket 5: Tuning Old PC Systems

Test Setup

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Hardware
ProcessorsIntel Pentium 75 MHzAMD K6-2/400
L2 Cache Clock66 MHz
System Bus Clock50 or 66 MHz
Memory Clock66 MHz
MemoryIBM SIMM 48 MB 16 ns
MotherboardsASUS P55TP4XE, Rev. 2.1Bios 14/02/1997
Graphics CardNVIDIA Riva 128, PCIWin98 default drivers
SoundCreative Soundblaster 64
Network3COM 3C905B-TX, 100 MBit/s
Hard DiskMaxtor 850 MB
Software & Settings
OS VersionWindows 98 SE, Service Pack 1
Screen Resolution1024 x 768 x 16 x 85
SYSmark 2000Version 1.0, Patch 4
Quake III ArenaTimedemo 1

Performance Comparison: Basic Model Vs. Tuning

To measure performance, we used the Sysmark 2000 application benchmark from BAPCo as well as the Timedemo1 from the well-known Quake III Arena games benchmark. Both test procedures clearly prove that the total system performance increases considerably by using the fast AMD-CPU in conjunction with the memory upgrade. Originally the processor bus clock of a Pentium 75 is 50 MHz. It is then increased to 66 MHz for an AMD K6-2/400. This influences the overall performance significantly. The L2 cache and the memory are also automatically clocked at a faster rate by increasing the processor bus clock. It's just rather annoying that the processor bus clock for the Intel 430FX chipset can only be adjusted to 66 MHz. Further increase of the processor bus clock to 75 MHz or even 83 MHz (as is offered by some boards with a 430HX chipset) would facilitate a processor core clock of 450 MHz or 500 MHz! And all this on a platform that is more than six years old.