MRM's Performance
    The 14 Step Program to OverClocking


Pentium Overclocking Table

Clock SpeedMultiplier Bus Speed
Pentium 60
1
x
60 Mhz
Pentium 66
1
x
66 Mhz
Pentium 75
1.5
x
50 Mhz
Pentium 90
1.5
x
60 Mhz
Pentium 100
1.5
x
66 Mhz
Pentium 112.5
1.5
x
75 Mhz
Pentium 120
2
x
60 Mhz
Pentium 125
1.5
x
83 Mhz
Pentium 133
2
x
66 Mhz
Pentium 150
2.5
x
60 Mhz
Pentium 150
2
x
75 Mhz
Pentium 166
2.5
x
66 Mhz
Pentium 166
2
x
83 Mhz
Pentium 187
2.5
x
75 Mhz
Pentium 200
3
x
66 Mhz
Pentium 208
2.5
x
83 Mhz
Pentium 225
3
x
75 Mhz
Pentium 233
3.5
x
66 Mhz
Pentium 250
3
x
83 Mhz
Pentium Pro 166
2.5
x
66 Mhz
Pentium Pro 200
3
x
66 Mhz
Pentium Pro 233
3.5
x
66 Mhz
Pentium Pro 266
4
x
66 Mhz
Pentium II 200
3
x
66 Mhz
Pentium II 233
3.5
x
66 Mhz
Pentium II 266
4
x
66 Mhz
Pentium II 300
4.5
x
66 Mhz
Pentium II 333
5
x
66 Mhz


Basic Overclocking Table

Below is a list of the first and second options when performing a basic overclocking of your CPU (NOTE: the AMD K5 PR/166+ runs using a 1.75x internal clock multiplier and the AMD K6 PR2/233 uses an internal 3.5x clock multiplier):
CPU Bus Speed Clock Multiplier Option 1 Option 2
AMD K5 PR/75+ @ 75MHz 50MHz 1.5x 66 x 1.5 = 100MHz 60MHz x 1.5 = 90MHz
AMD K5 PR/90+ @ 90MHz 60MHz 1.5x 66 x 1.5 = 100MHz N/A
AMD K5 PR/100+ @ 100MHz 66MHz 1.5x N/A N/A
AMD K5 PR/133+ @ 100MHz 66MHz 1.5x N/A N/A
AMD K5 PR/166+ @ ~116MHz 66MHz (Internal) 2.5x N/A N/A
AMD K6 PR2/166MHz 66MHz 2.5x 66 x 3.0 = 200MHz N/A
AMD K6 PR2/200MHz 66MHz 3.0x 66 x 3.5 = 233MHz N/A
AMD K6 PR2/233MHz 66MHz (Internal) 1.5x 66 x 4.0 = 266MHz N/A
Cyrix 6x86 PR90+ @ 80MHz 40MHz 2.0x 50 x 2.0 = 100MHz N/A
Cyrix 6x86 PR120+ @ 100MHz 50MHz 2.0x 55 x 2.0 = 110MHz N/A
Cyrix 6x86 PR133+ @ 110MHz 55MHz 2.0x 60 x 2.0 = 120MHz N/A
Cyrix 6x86 PR150+ @ 120MHz 60MHz 2.0x 66 x 2.0 = 133MHz N/A
Cyrix 6x86 PR166+ @ 133MHz 66MHz 2.0x N/A N/A
Intel Pentium 100MHz 66MHz 1.5x 66 x 2.0 = 133MHz 60 x 2.0 = 120MHz
Intel Pentium 120MHz 60MHz 2.0x 60 x 2.5 = 150MHz 66 x 2.0 = 133MHz
Intel Pentium 133MHz 66MHz 2.0x 66 x 2.5 = 166MHz N/A
Intel Pentium 150MHz 60MHz 2.5x 66 x 2.5 = 166MHz N/A
Intel Pentium 166MHz 66MHz 2.5x 66 x 3.0 = 200MHz 60 x 3.0 = 180MHz
Intel Pentium 180MHz 60MHz 3.0x 66 x 3.0 = 200MHz N/A
Intel Pentium 200MHz 66MHz 3.0x 66 x 3.5 = 233MHz N/A
Intel Pentium 233MHz 66MHz 3.5x N/A N/A
Intel Pentium II - 233MHz 66MHz 3.5x 66 x 4.0 = 266MHz N/A
Intel Pentium II - 266MHz 66MHz 4.0x 66 x 4.5 = 300MHz N/A


Advanced Overclocking Table

Below is a list of the first and second options when performing an advanced overclocking of your CPU (NOTE: the AMD K5 PR/166+ runs using a 1.75x internal clock multiplier and the AMD K6 PR2/233 uses an internal 3.5x clock multiplier):
CPU Bus Speed Clock Multiplier Option 1 Option 2
AMD K5 PR/75+ @ 75MHz 50MHz 1.5x 75 x 1.5 = 113MHz 66 x 1.5 = 100MHz
AMD K5 PR/90+ @ 90MHz 60MHz 1.5x 75 x 1.5 = 113MHz 66 x 1.5 = 100MHz
AMD K5 PR/100+ @ 100MHz 66MHz 1.5x 75 x 1.5 = 113MHz N/A
AMD K5 PR/133+ @ 100MHz 66MHz 1.5x 75 x 1.5 = 113MHz N/A
AMD K5 PR/166+ @ ~116MHz 66MHz (Internal) 2.5x N/A 75 x 1.5 = 112.5MHz
AMD K6 PR2/166MHz 66MHz 2.5x 83 x 2.5 = 210MHz 83 x 2.0 = 166MHz
AMD K6 PR2/200MHz 66MHz 3.0x 83 x 2.5 = 210MHz 75 x 3.0 = 225MHz
AMD K6 PR2/233MHz 66MHz (Internal) 1.5x 83 x 3.0 = 250MHz 75 x 3.5x = 262.5MHz
Cyrix 6x86 PR90+ @ 80MHz 40MHz 2.0x 50 x 2.0 = 100MHz N/A
Cyrix 6x86 PR120+ @ 100MHz 50MHz 2.0x 55 x 2.0 = 110MHz N/A
Cyrix 6x86 PR133+ @ 110MHz 55MHz 2.0x 60 x 2.0 = 120MHz N/A
Cyrix 6x86 PR150+ @ 120MHz 60MHz 2.0x 66 x 2.0 = 133MHz N/A
Cyrix 6x86 PR166+ @ 133MHz 66MHz 2.0x 75 x 2.0 = 150MHz N/A
Cyrix 6x86 PR200+ @ 150MHz 75MHz 2.0x 83 x 2.0 = 166MHz N/A
Intel Pentium 100MHz 66MHz 1.5x 83 x 1.5 = 125MHz 75 x 1.5 = 112.5MHz
Intel Pentium 120MHz 60MHz 2.0x 83 x 1.5 = 125MHz 66 x 2.0 = 133MHz
Intel Pentium 133MHz 66MHz 2.0x 83 x 2.0 = 166MHz 75 x 2.0 = 150MHz
Intel Pentium 150MHz 60MHz 2.5x 83 x 2.0 = 166MHz 75 x 2.0 = 150MHz
Intel Pentium 166MHz 66MHz 2.5x 83 x 2.5 = 208.3MHz 83 x 2.0 = 166MHz
Intel Pentium 180MHz 60MHz 3.0x 83 x 2.5 = 208.3MHz 83 x 2.0 = 166MHz
Intel Pentium 200MHz 66MHz 3.0x 83 x 3.0 = 250MHz 83 x 2.5 = 210MHz
Intel Pentium 233MHz 66MHz 3.5x 83 x 3.0 = 250MHz N/A
Intel Pentium II - 233MHz 66MHz 3.5x 66 x 4.0 = 266MHz N/A


486 Overclocking Table

486 CPU Table (in MHz)
Current Clock RateProbable Success at:Possible Success at:
1620-
202533
253340 or even 50
334050
4050-
6680-
100120-