x86 CPU Performance Comparision
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General Notices:

  • I use the Intel 486DX-33MHz processor as a reference, because it was (in my opinion) the first x86 processor, that could give the performance to run Microsoft Windows 3.1x with not just having pain.
  • In Win 3.1x or Win95, the general performance is related very closely to the CPU integer performance. However, special tools (like arbitrary image rotation) can be determined by mainly the FPU!
  • Recent and upcoming 3D games (like Quake) use so intensively floating point calculations, that the general performance is determined by only the FPU! Therefore the FPU performance can be almost treated as "Quake performance". (The average frame/sec in Quake (at 640x480 VESA 2.0 resolution) can be obtained if the FPU/DX33 ratio is multiplied by 0.8 .)

    In NOT Socket 7 compatible MotherBoard
    PROCESSOR: EXT_Freq INT_Freq CPU/DX33 FPU/DX33 Notice:
    Pentium-II-200 100 MHz 200 MHz 13 25
    Pentium-II-233 115 MHz 233 MHz 15 29.5
    Pentium-II-266 133 MHz 266 MHz 17.5 33
    Pentium-II-300 150 MHz 300 MHz 20 37.5
    P6/512kB-200 200 MHz 200 MHz 13 25.5
    P6/512kB-233 233 MHz 233 MHz 15 30
    P6/512kB-266 266 MHz 266 MHz 17.5 34
    Cx MediaGX-PR120 40 MHz 120 MHz 6.5 6 only for $50!
    Cx MediaGX-PR133 33 MHz 133 MHz 7 6.5 only for $63!
    Cx MediaGX-PR150 50 MHz 150 MHz 8 7.5 only for $75!
    Cx MediaGX-PR166 55 MHz 166 MHz 9 8.5 only for $88!
    Cx MediaGX-PR180 60 MHz 180 MHz 9.5 9 only for $121!
    MediaGX-MX-PR200 40 MHz 200 MHz 10.5 9.5 not available!

    In P55C (Pentium with MMX)-ready dual voltage MotherBoard
    PROCESSOR: EXT_Freq INT_Freq CPU/DX33 FPU/DX33 Notice:
    Cx 6x86MX-PR166 60 MHz 150 MHz 12 12 SlowPCI!-$190!
    Cx 6x86MX-PR200 66 MHz 166 MHz 13 13 $240!
    Cx 6x86MX-PR233 75 MHz 188 MHz 15 15 FastPCI!-$320!
    Cx 6x86MX-PR250 66 MHz 200 MHz 16 16 not available !
    Cx 6x86MX-PR266 75 MHz 225 MHz 18 18 not available !
    Cx 6x86MX-PR300 75 MHz 260 MHz 21 21 not available !
    Cx 6x86MX-PR360 83 MHz 290 MHz 23 23 not available !
    AMD K6-PR2-166 66 MHz 166 MHz 10.5 13.5
    AMD K6-PR2-200 66 MHz 200 MHz 12.5 16.5
    AMD K6-PR2-233 66 MHz 233 MHz 14.5 19 3.2/3.3 V!
    AMD K6-PR2-266 75 MHz 266 MHz 16.5 21.5 not available !
    AMD K6-PR2-300 83 MHz 290 MHz 18 23.5 not available !
    P55C-166 66 MHz 166 MHz 10 16.5
    P55C-200 66 MHz 200 MHz 11.5 17.5
    P55C-233 66 MHz 233 MHz 13.5 20
    P55C-266 75 MHz 266 MHz 15.5 23 not available !

    In P54C (Pentium) MotherBoard
    PROCESSOR: EXT_Freq INT_Freq CPU/DX33 FPU/DX33 Notice:
    AMD K5-PR75 50 MHz 75 MHz 5 3 slow FPU!
    AMD K5-PR90 60 MHz 90 MHz 6 4.5 slow FPU!
    AMD K5-PR100 66 MHz 100 MHz 6.5 5.5 slow FPU!
    AMD K5-PR120 60 MHz 90 MHz 6 5 slow FPU!!!
    AMD K5-PR133 66 MHz 100 MHz 6.5 5.5 slow FPU!!!
    AMD K5-PR166 66 MHz 133 MHz 8.5 7.5 2nd series
    Cx 6x86-P100+ 40 MHz 80 MHz 5.5 5 slow FPU/PCI!
    Cx 6x86-P120+ 50 MHz 100 MHz 6.5 6 slow FPU/PCI!
    Cx 6x86-P133+ 55 MHz 110 MHz 7.5 6.5 slow FPU/PCI!
    Cx 6x86-P150+ 60 MHz 120 MHz 8 7 slow FPU!
    Cx 6x86L-P166+ 66 MHz 133 MHz 9 8
    Cx 6x86L-P200+ 75 MHz 150 MHz 10 9 FAN!
    P54C-100 66 MHz 100 MHz 5 8.5
    P54C-120 60 MHz 120 MHz 6 10.5
    P54C-133 66 MHz 133 MHz 6.5 11
    P54C-150 60 MHz 150 MHz 7.5 13
    P54C-166 66 MHz 166 MHz 8.5 14.5
    P54C-180 60 MHz 180 MHz 9 15.5
    P54C-200 66 MHz 200 MHz 10 17.5

    In 486 MotherBoard
    PROCESSOR: EXT_Freq INT_Freq CPU/DX33 FPU/DX33 Notice:
    Am 486DX4-120-SV8B 40 MHz 120 MHz 3.5 4
    Am 5x86-133 (P75) 33 MHz 133 MHz 4 5
    Am 5x86-150 (P75+) 50 MHz 150 MHz 4.5 5.5
    Cx 5x86-100 (P75) 33 or 50 MHz 100 MHz 4 5 3.6 V
    Cx 5x86-120 (P90) 40 MHz 120 MHz 5 6 3.6V

    E-mail to DcsabaS E-mail # Last Mod: Fri, 23 May 2014 00:06:16 GMT Hungary Balaton Budapest iNDEX MTA KFKI MFA Alag3