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Green rectangular motherboard with LGA 775 socket two DDR2 slots and PCI Express x16

DELL

DELL CU395 System Board OptiPlex GX320 LGA 775 DDR2

SKU CH-583S-MW91F

Replacement system board for OptiPlex GX320 desktops with LGA 775 socket, two DDR2 slots supporting up to 2GB, one PCI Express x16 slot and dual ATI LAN chipsets

  • CPU Socket TypeLGA 775
  • CPU TypePentium 4 / Celeron
  • Number of Memory Slots2
  • Memory StandardDDR2-667/PC2-5300 DDR2-533/PC2-4200
  • Maximum Memory Supported2GB
  • PCI Express x161
  • Genuine Dell replacement keeps an OptiPlex GX320 running
  • LGA 775 socket accepts Pentium 4 or Celeron CPUs
  • Two DDR2 slots support 667 MHz or 533 MHz modules
  • Maximum 2 GB memory capacity for legacy workloads
  • Single PCI Express x16 slot for graphics expansion

Dell OptiPlex GX320 replacement board

The DELL CU395 system board is a direct replacement for the OptiPlex GX320 desktop. It uses an LGA 775 socket supporting Pentium 4 and Celeron processors. Two memory slots accept DDR2-533 or DDR2-667 modules up to a total of 2GB. A single PCI Express x16 slot and dual ATI LAN chipsets are integrated.

Upgrading a failed or faulty GX320 motherboard

This board replaces a damaged original unit in an existing OptiPlex GX320 chassis. The jump is worth it when the current board has failed and the system must stay on the LGA 775 platform. It restores the original specification without requiring a move to a newer socket or memory standard. No CPU or RAM upgrade path beyond the listed limits exists on this board.

Installation fits the original GX320 chassis

The board mounts directly into the OptiPlex GX320 case using the stock standoffs and I/O shield. Front-panel headers, power connectors and the CPU cooler retention bracket align with the original layout. The most common issue is sourcing matching DDR2-533 or DDR2-667 memory, as newer DDR generations are physically incompatible and will not fit the slots.

Highlights

  • Genuine Dell replacement keeps an OptiPlex GX320 running
  • LGA 775 socket accepts Pentium 4 or Celeron CPUs
  • Two DDR2 slots support 667 MHz or 533 MHz modules
  • Maximum 2 GB memory capacity for legacy workloads
  • Single PCI Express x16 slot for graphics expansion

Specifications

BrandDELL
CPU Socket TypeLGA 775
CPU TypePentium 4 / Celeron
Number of Memory Slots2
Memory StandardDDR2-667/PC2-5300 DDR2-533/PC2-4200
Maximum Memory Supported2GB
PCI Express x161
LAN ChipsetATI
Second LAN ChipsetATI

Questions about this item

Will this board fit inside a Dell OptiPlex GX320 chassis?

Yes, it is the CU395 system board built for the OptiPlex GX320 small-form-factor case and uses the standard mounting points.

What memory modules are compatible with the two DDR2 slots?

The board accepts DDR2-533 (PC2-4200) or DDR2-667 (PC2-5300) unbuffered DIMMs up to a total of 2 GB.

Which processors can be installed in the LGA 775 socket?

Supported CPUs are Pentium 4 and Celeron models that use the LGA 775 package and match the board’s power and thermal limits.

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