GU083 / 0GU083 - Dual Socket LGA771 Motherboard / System Board for Precision Workstation 490

This GU083 motherboard is a replacement system board for compatible Precision Workstation 490 desktop and tower configurations. Built around the Intel 5000X chipset, it provides two processor sockets, eight DDR2 ECC Fully Buffered memory slots, integrated SATA storage connectivity, Gigabit Ethernet, and a combination of PCI Express, PCI-X, and PCI expansion slots.

Designed for workstation repairs and component transfers, this board supports the Precision 490 platform’s processor, memory, storage, and cooling architecture. Match the original board identification and processor configuration before ordering.

Technical Specifications

• Product Type: Motherboard / system board / mainboard
• Primary Part Number: GU083
• Alternate Part-Number Format: 0GU083
• System Application: Precision Workstation 490
• Board Layout: System-specific Precision 490 chassis layout
• Chipset: Intel 5000X
• Processor Sockets: Two LGA771 sockets
• Processor Configuration: Single-processor or matched dual-processor operation
• Processor Families: Xeon 5100 series dual-core; Xeon 5300 series quad-core support requires confirmation of board revision and BIOS
• Front-Side Bus: 1066MHz or 1333MHz with supported Xeon 5100 and 5300 processors
• Memory Slots: Eight DIMM sockets
• Memory Type: DDR2 ECC Fully Buffered DIMM / FB-DIMM
• Memory Speeds: 533MHz and 667MHz
• Memory Class: PC2-4200F and PC2-5300F
• Supported Module Capacities: 512MB, 1GB, 2GB, and 4GB
• Documented Maximum Memory: 32GB using eight 4GB modules
• Memory Architecture: Quad-channel with correctly matched sets of four modules
• Storage Interface: Integrated SATA 3.0Gb/s
• Integrated SATA RAID: RAID 0, 1, and 5
• Networking: Integrated 10/100/1000 Ethernet
• Audio: Integrated high-definition audio with STAC9200 codec
• Graphics Interface: PCI Express x16 for a separate graphics card
• RTC Battery Type: CR2032 3V lithium coin cell

Expansion Slots

• Graphics Expansion: One PCI Express x16 slot
• Additional PCI Express: Two physical x8 slots, each wired for a maximum x4 link
• Legacy Workstation Expansion: Two 64-bit 100MHz PCI-X slots
• Legacy PCI Expansion: One 32-bit 33MHz PCI slot
• Total Expansion Slots: Six

Available card length and clearance depend on whether the chassis is configured in desktop or tower orientation. Select expansion cards that fit the installed cooling assemblies, drive layout, and power configuration.

Ports and Internal Connections

Rear I/O connections:

• USB: Five USB 2.0 ports
• Network: One RJ-45 Ethernet port
• Serial: Two 9-pin serial ports
• Parallel: One 25-pin parallel port
• Keyboard / Mouse: Two PS/2 ports
• Audio: Line-in and line-out / headphone connections

Internal connections:

• SATA: Five 7-pin SATA connectors
• IDE / PATA: One 40-pin connector
• Floppy Drive: One 34-pin connector
• Internal USB: One 10-pin connector for the optional FlexBay media-card reader
• Power: Main and secondary board power connections
• Cooling: Front-fan, card-cage-fan, and memory-fan connections
• Chassis: Front-panel, internal-speaker, and chassis-intrusion connections

The original front-panel assembly provides two additional USB 2.0 ports, a microphone connection, and a headphone connection. Front-panel hardware and cables are separate components.

Interchangeable / Replacement Part Numbers

Direct part-number references:

✔️ GU083
✔️ 0GU083
✔️ CN-0GU083 — identification prefix found within longer board-label strings

These formats identify the same base part number. Match the complete board label and revision when replacing an existing assembly.

⭐➕ Compatible Processor Available Separately

A Xeon 5160 processor option is available for supported dual-core configurations:

BX805565160A — Xeon 5160 3.00GHz 1333MHz 4MB LGA771 Dual-Core Processor

For dual-processor installations, select a matching processor pair and confirm the supported stepping, BIOS, and cooling configuration.

⭐➕ Compatible Memory Available Separately

The following memory matches the required 4GB DDR2-667 ECC Fully Buffered specification:

MT36HTF51272FDY-667G1D6 — 4GB PC2-5300F ECC Fully Buffered Memory

Order matched modules and confirm full-length heat spreaders are fitted. The Precision 490 requires full-length heat spreaders for 667MHz DIMMs.

⭐➕ Compatible Replacement Power Supplies

Replacement 750W power supplies listed for the Precision 490 are available separately:

JK933 — 750W Power Supply for Precision 490
KK617 — 750W Power Supply for Precision 490
H750E-00 — 750W Power Supply for Precision 490
N750E-00 — 750W Power Supply for Precision 490

Match the original power-supply connections, harness, and chassis mounting before ordering.

⭐➕ Recommended Thermal Paste

Apply fresh thermal paste when transferring or reinstalling the processor heatsinks:

Shin-Etsu G751 High-Performance Thermal Grease / Thermal Paste for CPU Processors

Clean the old compound from the processor and heatsink contact surfaces before applying fresh paste. Each installed processor requires its own compatible heatsink and thermal interface.

✅ Confirmed Compatibility

Supported system application:

✔️ Precision Workstation 490
✔️ Precision 490 in desktop orientation
✔️ Precision 490 in tower orientation
✔️ Configurations originally equipped with a matching GU083 / 0GU083 system board

Xeon 5100 series dual-core processor options:

✔️ Xeon 5110 — 1.60GHz
✔️ Xeon 5120 — 1.86GHz
✔️ Xeon 5130 — 2.00GHz
✔️ Xeon 5140 — 2.33GHz
✔️ Xeon 5150 — 2.66GHz
✔️ Xeon 5160 — 3.00GHz

Xeon 5300 series quad-core configurations:

The Precision 490 platform was also offered with Xeon 5300 series processors. Confirm the specific GU083 board revision, BIOS, and intended processor before selecting a quad-core configuration. Platform-level support does not establish compatibility with every board revision or processor stepping.

Memory configurations:

✔️ DDR2-533 PC2-4200F ECC Fully Buffered DIMMs
✔️ DDR2-667 PC2-5300F ECC Fully Buffered DIMMs with full-length heat spreaders
✔️ Matched pairs installed in the prescribed slot order
✔️ Matched sets of four for quad-channel operation
✔️ Up to 32GB using eight compatible 4GB modules

☑️ Key Features

☑️ Replacement system board for Precision Workstation 490
☑️ Two LGA771 processor sockets
☑️ Intel 5000X workstation chipset
☑️ Eight ECC Fully Buffered memory slots
☑️ Supports up to 32GB of documented memory capacity
☑️ Six expansion slots for graphics and workstation peripherals
☑️ Five SATA connections with integrated RAID support
☑️ Integrated Gigabit Ethernet and high-definition audio
☑️ Legacy serial, parallel, PS/2, IDE, and floppy connectivity
☑️ Processor, memory, power-supply, and thermal-paste options linked above

⚙️ Fit Notes

• Confirm GU083 / 0GU083 and the original board revision before ordering.
• Use the original Precision 490 chassis mounting arrangement, front-panel connections, power harness, and cooling hardware.
• Install a single processor in the primary socket marked CPU_0.
• Dual-processor installations require a compatible matching pair and appropriate cooling for both processors.
• Verify BIOS support before changing the processor family or stepping.
• Use ECC Fully Buffered DDR2 memory. The Fully Buffered designation is required; ECC alone is insufficient.
• Install matched memory pairs in DIMM_1 and DIMM_2, followed by DIMM_3 and DIMM_4, continuing in numbered order.
• For quad-channel operation, install matching sets of four in DIMM_1–DIMM_4, then DIMM_5–DIMM_8. Match capacity, rank, and organization within each set.
• Keep the memory fan, airflow guides, and required DIMM heat spreaders installed.
• A suitable 64-bit operating system is needed to use the full capacity of larger memory configurations.
• Display connections are provided by the installed graphics card.
• SAS drives require an appropriate SAS controller and cables.
• Reapply thermal paste whenever a processor heatsink is removed.
• Confirm included components separately; linked accessories are sold separately.