Intel DX4
IntelDX4 is a
continued using the i486 naming convention.Intel produced IntelDX4s with two
i486 OverDrive editions of IntelDX4 had locked multipliers, and therefore can only run at 3× the external clock speed. The 100-MHz model of the processor had an iCOMP
rating of 435, while the 75-MHz processor had a rating of 319. IntelDX4 was an OEM-only product, but the DX4 Overdrive could be purchased at a retail store.
The IntelDX4 microprocessor is mostly
80486, but requires a lower 3.3-V supply. Normal 80486 and DX2 processors use a 5-V supply; plugging a DX4 into an unmodified socket will destroy the processor. Motherboards lacking support for the 3.3-V CPUs can sometimes make use of them using a voltage regulator module
(VRM) that fits between the socket and the CPU. The DX4 OverDrive CPUs have VRMs built in.
Specifications
| Processor speed (MHz) | Input clock (MHz) and multiplier | Voltage (nominal) (V) | Voltage range (V) | Part number | Sspec number |
|---|---|---|---|---|---|
| 75 | 25 × 3 | 3.3 | 3.1–3.6 | FC80486DX4-75 | SK052, SX883 |
| 75 | 25 × 3 | 3.3 | 3.1–3.6 | A80486DX4-75 | SK047, SX884 |
| 75 | 25 × 3 | 3.3 | 3.1–3.5 | A80486DX4WB-75 | SK102 |
| 75 | 25 × 3 | 3.3 | 3.1–3.5 | FC80486DX4WB-75 | SK100 |
| 100 | 33 × 3 | 3.3, 3.45 | 3.1–3.6 | FC80486DX4-100 | SX906 |
| 100 | 33 × 3 | 3.45 | 3.3–3.6 | A80486DX4-100 | SK051, SX900 |
| 100 | 33 × 3 | 3.45 | 3.3–3.6 | A80486DX4WB-100 | SK096 |
| 100 | 33 × 3, 50 × 2 | 3.45 | 3.3–3.6 | FC80486DX4-100 | SX876 |
| 100 | 33 × 3, 50 × 2 | 3.3, 3.45 | 3.1–3.6 | FC80486DX4-100 | SK053 |
| 100 | 33 × 3, 50 × 2 | 3.45 | 3.3–3.6 | A80486DX4-100 | SX877 |
| 100 | 33 × 3, 50 × 2 | 3.3 | 3.1–3.6 | A80486DX4-100 | SK050 |
| 100 | 33 × 3, 50 × 2 | 3.3 | 3.1–3.6 | A80486DX4WB-100 | Limited availability |
| 100 | 33 × 3, 50 × 2 | 3.3 | 3.1–3.6 | FC80486DX4WB-100 | SK099 |