| Microprocessor information |
|---|
| Type | Microprocessor |
| Introduction date | 06/24/1991 |
| Manufacturing process | 1 micron
1.2 million transistors |
| Data bus width | 32 bit |
| Package | 168-pin Pin Grid Array
1.75" x 1.75" (4.45 cm x 4.45 cm) |
| Speed (MHz) | 50 |
| Bus frequency (MHz) | 50 |
| Specification numbers | SX408 SX409 SX518 SX546 SX547 SX705 SX710 |
| On-chip peripherals | Memory management unit |
| Physical memory (GB) | 4 |
| Virtual memory (TB) | 64 |
| Level 1 cache size | 8 KB 4-way set associative unified code and data cache |
| Floating Point Unit | Integrated |
| V core (V) | 5 ± 5% |
| Min/Max operating temperature (°C) | 0 - 85 |
| Typical/Max power dissipation (W) | 4 / 5.25 |
Problems with 50MHz 486
From what I can remember, the first batch of 50MHz 486DX chips had some serious heat issues, and I believe intel issued a recall. I am pretty certain Intel switched production of the 50MHz part over to a smaller die size to fix the problem.
50MHz parts were only popular with ISA and EISA systems. It was very hard to build a 50MHz VLB or PCI system. Therefore the 50MHz DX/2s are far more common.