CPU

Intel Celeron

Pentium 3

From 1997

3.3 Volt - can handle up to 3.6Volt

8KB L1 Write back cache

Meant to be used with a 33Mhz BUS speed.

• According to this video the CPU has 16KB L1 Write back cache: https://youtu.be/wm_QoqwQ1hU?t=152

This CPU is a relabeled AM 5x86 with a secret 4x multiplier?

• Use 2X multiplier on the motherboard setting if it does not have 4x

  • So by setting MB to 2X and see if you get a AM 5x86 !!!

• By setting the MB to 40Mhz, and boosting voltage til 3,6 you get 160Mhz. Not tested.

• But a 50Mhz BUS speed and 3x multiplier is maybe the best option - test and see.

From 2000

3.3 Volt

16KB L1 Write Back Cache

Meant to be used with a 33Mhz BUS speed.

Default multiplier is of course 2x on this DX2-66, but if you set it to 3x - according to this video: https://youtu.be/wm_QoqwQ1hU?t=413, you  get AMD 486DX4 Enhanced running at 100Mhz

• Setting the Bus speed to 50Mhz, you get 150Mhz CPU

• vswitchzero managed to get hos PC to run 80Mhz BUS and 161Mhz CPU !

The 486 CPU Era – The Birth of Overclocking. – Part 2 | The CPU Shack Museum 

Picture: Speedsys

2x33Mhz

5 Volt

8KB L1 Write-through cache

3x25Mhz

3.3 Volt (3.1 - 3.6). Tested in a 5V Socket 3, and works. But gets very hot, must use Fan.

16 KB L1 Write-through cache

Copilot: Yes, all Intel 486 DX4-75 (A80486DX4-75) processors are designed to run at a 3x multiplier with a 33 MHz front-side bus (FSB), resulting in an effective clock speed of 99 MHz. This configuration is within the intended operational parameters of the CPU.

• I tested it on a Socket 3 using 5V and 3x33. Did not work.

168pin - Swap out replacement. 

• The similar CPU with 169 pins is the Intel OverDrive ODP (OverDrive Processor). The extra pin in the ODP variant was used for inserting into a special ‘OverDrive’ (Socket 1) socket on some 486 boards, which would disable the existing CPU without needing to remove it

5 Volt - Also works in 3.3 Volt systems.

2x33Mhz

Write-back cache - ordinary DX2-66 has Write-through cache. WB is fastest.

Built-in heatsink and fanless.

Yes, the Intel OverDrive DX2 ODPR 66 is designed to automatically detect and adjust to the appropriate voltage. If the motherboard provides 5 volts, the integrated voltage regulator steps it down to 3.3 volts. If the motherboard already provides 3.3 volts, the processor will operate directly at that voltage without needing to step it down.

20/25Mhz (was written on the box it came in)

Came from a IBM PS/2 original upgrade box - had 2 CPU's in one box.

5 Volt

8KB L1 cache

5 Volt

8KB L1 cache