IEI ROCKY-4786: High-Performance Socket 478 PICMG 1.0 CPU Card
The IEI ROCKY-4786 is a strong, full-size PICMG 1.0 Single Board Computer (SBC) that is made for important industrial and marine uses. This board works with the Socket 478 Intel® Pentium® 4 and Celeron® D processors and has an FSB speed of up to 800MHz. It connects high-speed processing with legacy ISA/PCI expandability.
The ROCKY-4786 is built to last in tough conditions and has advanced networking through Gigabit Ethernet and high-speed I/O interfaces like USB 2.0 and SATA. This makes it the best choice for upgrading old industrial control systems without having to replace the backplanes.
Technical Details
| Feature | Specification |
|---|---|
| CPU Socket | Socket 478 (Intel® Pentium® 4 / Celeron® D) |
| Front Side Bus | 400MHz / 533MHz / 800MHz |
| Chipset | Intel® 865G + ICH5 |
| Memory | 2 x 184-pin Dual-Channel DDR 400/333MHz (Up to 2GB) |
| Ethernet | Intel® 82541PI GbE Controller |
| Video Output | Integrated Intel® Extreme Graphics 2 (VGA) |
| Storage | 2 x SATA I (150MB/s), 2 x IDE (Ultra ATA 100) |
| I/O Ports | 4 x USB 2.0, 2 x RS-232, 1 x LPT, 1 x PS/2 |
| Watchdog Timer | Software programmable (1 ~ 255 sec.) |
| Power Supply | AT/ATX Power Support |


Main Features:
- Versatile Processor Support: Supports a wide range of Socket 478 CPUs, allowing for custom performance-to-heat ratios.
- Dual-Channel DDR Memory: Improved memory bandwidth for real-time data processing and industrial automation.
- Legacy Integration: Full PICMG 1.0 compliance guarantees smooth communication with ISA and PCI expansion cards.
- High-Speed Connectivity: Integrated Gigabit LAN and SATA interfaces deliver modern data throughput in a classic design.
- Industrial Grade Stability: Designed with high-MTBF components to withstand continuous 24-hour operation in high-vibration environments.
Marine Engineer’s Guide: How to Put Things Together and Keep Them Running
As an engineer who works in marine and offshore settings, hardware reliability isn’t just a nice-to-have; it’s a safety requirement. The IEI ROCKY-4786 is a workhorse card that is especially useful because it keeps older, proprietary sensing hardware working while also giving you modern data paths.
- How to manage heat in closed racks: The Socket 478 architecture can get very hot. If airflow is limited in marine consoles, I suggest using a high-quality active copper-core heatsink. Make sure to clean the chassis filters every month to keep salt mist and dust from building up. This can cause the PCB to overheat or corrode through electrolytic corrosion.
- Deployment of SATA vs. IDE: The board does support IDE, but I strongly recommend using the SATA interfaces for integrating modern SSDs. This gets rid of the risk of HDDs breaking down in places with a lot of vibration, like engine rooms. If you’re using old DAQ cards with the ISA bus, make sure the I/O address jumpers on your expansion cards don’t interfere with the resources on the ROCKY-4786.
- Setting Up the BIOS and Watchdog: Always turn on the Watchdog Timer in the BIOS for installations that are remote or don’t have anyone there. This means that if the OS freezes because of a power surge or a software bug, the system will automatically restart, which keeps important monitoring stations from being down for long.
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