The manual specifies Jumper JMP1 for CMOS reset:
| Jumper Position | Mode | |----------------|------| | Pins 1-2 (default) | Normal operation | | Pins 2-3 | Clear CMOS / Reset BIOS |
Procedure for Rev 1.02a:
Note: Some Rev 1.02a boards lack a physical jumper and use a "CLR_CMOS" solder pad – short the two pads with a screwdriver tip for 5 seconds.
The official manual lists only the CPUs Acer sold with the system. But after years of testing, the Rev 1.02a supports:
| CPU | Core | TDP | Requires BIOS version | Notes | |-----|------|-----|-----------------------|-------| | Core 2 Quad Q6600 (G0 stepping) | Quad | 105W | R01.B0 (or later) | Maximum recommended | | Core 2 Duo E8400 | Dual | 65W | R01.B0 | Best performance/watt | | Pentium Dual-Core E5800 | Dual | 65W | Any | Stable and cool | | Celeron E3500 | Dual | 65W | Any | Budget option | | Not supported: Core 2 Extreme QX9650 (130W TDP) or Xeon mods (LGA 771 to 775 adapters often fail on this board due to VRM limitations). Acer Ipimb-ar Rev 1.02a Manual
By following the guidelines and information provided in this manual, users can maximize their experience with the Acer Ipimb-ar Rev 1.02a, ensuring optimal performance and longevity of the device.
The Acer IPIMB-AR (also known as the Rev 1.02a) is a specialized Micro-ATX motherboard frequently found in Acer Aspire and Gateway desktop systems, such as the Acer Aspire AM3985 or AT3985 series. Because this is an Original Equipment Manufacturer (OEM) board produced by Pegatron, a standalone retail manual can be difficult to find.
This guide serves as a comprehensive technical reference for the Acer IPIMB-AR Rev 1.02a, covering its specifications, layout, and pin configurations to help you with upgrades or repairs. 🛠️ Technical Specifications
Understanding the hardware limits of this board is essential before purchasing upgrade components. Chipset: Intel B75 Express.
Socket: LGA 1155 (Supports Sandy Bridge and Ivy Bridge CPUs). Overview — Acer IPIMB-AR Rev 1
Memory: 4 x DDR3 DIMM slots (Dual Channel, up to 32GB total, 1333/1600 MHz). Form Factor: Micro-ATX (approx. 24.4 cm x 24.4 cm). Expansion Slots: 1 x PCI Express x16 (Blue). 3 x PCI Express x1. 1 x Mini PCI Express (often used for Wi-Fi cards). Storage: 1 x SATA III (6.0 Gb/s) — usually the black or red port. 5 x SATA II (3.0 Gb/s). 🔌 Front Panel Header Pinout
The most common reason users search for this manual is to connect the power button, reset switch, and LEDs when moving the board to a new case. The front panel header (usually labeled F_PANEL) is typically color-coded but follows this standard layout: Pin Number Assignment Pins 1-3 Hard Drive Activity LED Pins 2-4 Pins 5-7 Reset Switch Pins 6-8 Power Button Pin 9 Reserved (Leave empty) ⚡ Power and Cooling Connections
To ensure system stability, verify these connections are seated firmly: Main Power: 24-pin ATX Power Connector.
CPU Power: 4-pin 12V Connector (Located near the CPU socket). CPU Fan: 4-pin PWM header (Labeled CPU_FAN). System Fan: 3-pin or 4-pin header (Labeled SYS_FAN). 🖥️ Rear I/O Ports
The Rev 1.02a provides a standard array of ports for peripheral connectivity: 2 x USB 3.0 ports (Blue). 4 x USB 2.0 ports (Black). 1 x HDMI port. 1 x VGA (D-Sub) port. 1 x RJ-45 Ethernet port (Gigabit). 3 x Audio Jacks (Line-in, Line-out, Mic-in). ⚠️ Important Installation Notes Form factor & use: Laptop motherboard used in
BIOS Limitations: As an OEM board, the BIOS is often "locked." It may not support high-end overclocking or specific high-performance RAM profiles (XMP).
UEFI vs Legacy: This board generally supports UEFI, which is necessary for booting from drives larger than 2TB and running Windows 11 (though the CPU might not be officially supported by Microsoft).
Clear CMOS: If the system fails to boot after a hardware change, locate the CLR_CMOS jumper. Move the jumper from pins 1-2 to 2-3 for 10 seconds, then return it to the original position to reset the BIOS settings.
| Type | Speed | Max per slot | Max total | Registered/ECC? | |------|-------|-------------|-----------|------------------| | DDR2 (non-ECC) | 533 / 667 / 800 MHz | 2GB | 4GB | No ECC support |
Important manual omission: Rev 1.02a does not support dual-sided 4GB modules (2Rx8). Use 1Rx8 or 2Rx8 2GB sticks only. High-density RAM (16-chip modules made for AMD) will not POST.
The BIOS on the IPIMB-AR is the definition of "locked down."