IBM PS/2 Model 95

Comparative benchmarks between the Type 3 486DX-50 and Type 4 Pentium 60 processor complexes.

This page is my attempt to answer the question of which is faster, a "stock" T4 Pentium 60/66 or a T3 50 MHz complex fitted with an AMD 5x86 clocked at 150 MHz (x3 multiplier).

Sysbench 0.9.1d benchmark results

Operating system: IBM OS/2 Warp 4.0
Test Conditions: test platform was a PS/2 Model 95xp 486 8595-0xF, 48 MB parity RAM, OS/2 timeslice-32,32.
Benchmarks were run on the known stable Type-3 processor complex that had been in service for several
months in this box. The T3 was then removed and replaced with a Type-4 Pentium 60 complex, and
benchmarks re-run.  No changes were made to the operating system or other system hardware.

CPU Integer tests

CPU Brand/Board Cache Dhrystone Hanoi Heapsort Sieve CpuI-marks
AMD 5x86-133 
@ 150 MHz		 IBM/8595 256 K 29.861 8.721 23.694 24.445 23.820
Pentium 60 IBM/8595 256K 49.604  39.171  27.145  48.708  42.973 

CPU Floating Point tests

CPU Brand/Board Cache LinPack Flops FFT CpuF-marks
AMD 5x86-133 
@ 150 MHz		 IBM/8595 256 K 4.512 7.641 5.516 6.348
Pentium 60 IBM/8595 256K 4.210 9.308 6.074 7.255

DIVE tests

CPU Vid Bus Vid Card Vid Mem Video Bus Bandwidth DIVE fun M->S DD 1.00:1 Dive-marks
AMD 5x86-133 
@ 150 MHz		 MCA XGA-2 1 MB 7.430 26.562 25.323 9.554
Pentium 60 MCA XGA-2 1 MB 6.997 24.514 23.849 8.963

Video tests

1024x768x256

CPU Vid Bus Vid Card Vid Mem BitBlt S->S Copy BitBlt M->S Copy Filled Rect. Pattern Fill Vert. Lines Horiz. Lines Diag. Lines Text Render PM-marks
AMD 5x86-133 @ 150 MHz MCA XGA-2 1 MB 13.815 4.246 13.041 36.546 2.734 4.810 3.476 6.947 10.133
Pentium 60 MCA XGA-2 1 MB 13.855 3.592 13.059 35.946 2.778 4.955 3.534 6.725 9.982

Disk tests

CPU Brand/Board Bus Controller Drive Avg. Data Access time Cache/Bus xfer Avg. Transfer Disk use CPU load DiskIO-marks
AMD 5x86-133 @ 150 MHz IBM/8595 
Type 3		 MCA IBM SCSI/Cache w/2 MB IBM 0661 
379 MB		 35.100 2.950 1.417 11.000 12.164
Pentium 60 IBM/8595 
Type 4		 MCA IBM SCSI/Cache w/2 MB IBM 0661 
379 MB		 34.900 2.826 1.503 15.000 12.439
AMD 5x86-133 @ 150 MHz IBM/8595 
Type 3		 MCA IBM SCSI/Cache w/2 MB IBM 0661 
305 MB		 36.400 2.955 1.127 9.000 10.611
Pentium 60 IBM/8595 
Type 4		 MCA IBM SCSI/Cache w/2 MB IBM 0661 
305MB		 35.900 2.830 1.183 5.000 10.983
AMD 5x86-133 @ 150 MHz IBM/8595 
Type 3		 MCA IBM SCSI/Cache w/2 MB IBM 62RW100 
817 MB		 32.100 2.951 1.299 12.000 11.653
Pentium 60 IBM/8595 
Type 4		 MCA IBM SCSI/Cache w/2 MB IBM 62RW100 
817 MB		 32.200 2.825 1.325 6.000 11.845
 

Memory
 
Type 3 AMD 5x86-133  
@ 150 MHz		 Type 4 Pentium 60
5       kB copy  20.839    MB/s 201.613    MB/s
10     kB copy  20.915    MB/s 102.513    MB/s
20     kB copy  20.905    MB/s 57.969    MB/s
40     kB copy  20.889    MB/s 54.342    MB/s
80     kB copy  20.887    MB/s 53.934    MB/s
160   kB copy  20.480    MB/s 42.553    MB/s
320   kB copy  13.698    MB/s 16.247    MB/s
640   kB copy  10.131    MB/s 10.891    MB/s
1280 kB copy  10.101    MB/s 10.878    MB/s
5       kB read 135.141    MB/s 73.366    MB/s
10     kB read 127.885    MB/s 63.951    MB/s
20     kB read 69.618    MB/s 59.476    MB/s
40     kB read 69.623    MB/s 59.217    MB/s
80     kB read 69.254    MB/s 59.260    MB/s
160   kB read 53.862    MB/s 58.331    MB/s
320   kB read 33.396    MB/s 33.221    MB/s
640   kB read 24.125    MB/s 26.372    MB/s
1280 kB read 24.127    MB/s 26.388    MB/s
5       kB write 21.003    MB/s 75.102    MB/s
10     kB write 20.974    MB/s 75.020    MB/s
20     kB write 20.973    MB/s 75.188    MB/s
40     kB write 20.993    MB/s 75.038    MB/s
80     kB write 20.998    MB/s 74.847    MB/s
160   kB write 20.956    MB/s 59.260    MB/s
320   kB write 20.998    MB/s 23.049    MB/s
640   kB write 20.998    MB/s 16.903    MB/s
1280 kB write 20.992    MB/s 16.875    MB/s
Total 28.180 Mem-marks 45.619 Mem-marks
 

 
Landmark "Speed" (DOS) Benchmark results

Disclaimer: In today's world of blinding fast multi-cached CPU's and multi-tasking operating systems, Landmark Speed numbers are virtually useless for quantifying a system's real-world performance.  They are presented here only as a relative indicator of CPU core performance when excecuting multiple timed loops in a single-tasking environment.  The operating system used was IBM PC-DOS 2000, loaded in a "pure" configuration with no memory managers or device drivers loaded.
 
Type 3 5x86-133 @ 150 MHz
Type 4 Pentium @ 60 MHz

 
Speed v2.0
Speed v6.0 
CPU 225.49 MHz 495.96 MHz
FPU 807.69 MHz 580.20 MHz
Video 3963 Chr/mS 3947.95 Chr/mS
 
 
Speed v2.0
Speed v6.0 
CPU 346.5 MHz 625.9 MHz
FPU 1177.37 MHz 1002.70 Mhz
Video 3963 Chr/mS 3963 Chr/mS
 
 
Micro2000 "Microscope" v6.5 Benchmark results

Micro2000 uses their own custom kernel to run the Microscope diagnostic program.  I don't know a whole lot about it, but I present it here as yet another set of numbers to confuse the issue.
 
Type 3 5x86-133 @ 150 MHz
Type 4 Pentium @ 60 MHz

 
Instructions/Second
MHz
CPU 66225 K 134
NPU 27405 K 148
 
System Memory 5771.9 KBPS
Text Mode 145.0 KBPS
CGA 106.1 KBPS
EGA 220.0 KBPS
 
 
Instructions/Second
MHz
CPU 68015 K 76
NPU 30959 K 60
 
System Memory 6765 KBPS
Text Mode 189 KBPS
CGA 85 KBPS
EGA 142 KBPS
 

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