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Green rectangular Dell MH651 motherboard with LGA 775 socket, two DDR2 slots, PCIe x16 slot, ATI LAN chips

DELL

DELL MH651 Intel Motherboard LGA 775 DDR2 4GB

SKU CH-HMEW-2FFM7

LGA 775 desktop board for Pentium 4 or Celeron CPUs with two DDR2 slots supporting up to 4 GB and one PCI Express x16 slot

  • ProcessorPentium 4 / Celeron
  • CPU socketLGA 775
  • Memory slot count2
  • Supported memoryDDR2-533/PC2-4200 DDR2-667/PC2-5300
  • Max supported RAM4 GB
  • PCIe x16 slots1
  • LGA 775 socket fits Pentium 4 and Celeron CPUs
  • Dual-channel DDR2-533/667 memory up to 4 GB capacity
  • Single PCI Express x16 slot for graphics expansion
  • Dual ATI LAN chipsets provide wired network connectivity
  • Genuine Dell MH651 board for OptiPlex GX320 systems

Dell OptiPlex GX320 replacement board

The DELL MH651 is a spare system board built for the OptiPlex GX320 desktop. It accepts Pentium 4 or Celeron processors in an LGA 775 socket and provides two DDR2 memory slots. This board is for technicians or owners restoring a legacy Dell system to working order.

Check your chassis and memory before ordering

Verify that the case is an OptiPlex GX320 so the mounting points and I/O shield align. Confirm you have DDR2-533/PC2-4200 or DDR2-667/PC2-5300 modules; the board supports up to 4GB across the two slots. Ensure the existing power supply uses the Dell proprietary connector used by the GX320.

Thermals noise and power draw in normal use

The board relies on the original GX320 cooling assembly and case airflow; no independent fan headers are described in the data. Power consumption is determined by the installed Pentium 4 or Celeron CPU and the memory configuration. Acoustic output will match the system fan profile of the host chassis.

How it compares

Measured against everything we stock in Motherboards for Intel CPUs, at today’s prices. Recalculated every night.

Price $36.99
Cheaper than about 92% of the 2,965 comparable items (median $97.99).

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Specifications

Product
Brand nameDELL
Processor
ProcessorPentium 4 / Celeron
CPU socketLGA 775
Memory
Memory slot count2
Supported memoryDDR2-533/PC2-4200 DDR2-667/PC2-5300
Max supported RAM4 GB
Connectivity
Ethernet controllerATI
Second LAN controllerATI
Ports & slots
PCIe x16 slots1

Questions about this item

Will this board fit in a standard OptiPlex GX320 case?

Yes, it is the Dell MH651 system board made for the OptiPlex GX320 chassis and mounts directly to the original standoffs.

Which memory modules should I buy for the two slots?

Use unbuffered DDR2-533 (PC2-4200) or DDR2-667 (PC2-5300) DIMMs; the board supports up to 4 GB total across both slots.

What expansion cards can I add to the PCI Express x16 slot?

The single PCI Express x16 slot accepts standard graphics cards or other x16 add-in cards that fit the physical slot and power budget of the GX320.

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