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Genuine Dell Intel 945G Express Socket 775 Motherboard For Optiplex GX520 Desktop Systems Part Numbers: RJ291
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Genuine Dell Intel 945G Express Socket 775 Motherboard For Optiplex GX520 Desktop Systems Part Numbers: RJ291

Bottom line: The Genuine Dell Intel 945G Express Socket 775 Motherboard is a specs-and-price decision rather than a crowd-consensus one in the retro motherboards category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ Genuine Dell Motherboard For Optiplex GX520 Desktop Systems

Cons

  • ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
  • ✗ Used and vintage listings vary by seller and condition — check the listing photos, description and return terms before buying

Manufacturer description

Genuine Dell Motherboard For Optiplex GX520 Desktop Systems. This is for motherboard ONLY, and does not include processor, memory, heatsinks, or heatsink retainers. Motherboard Information: Chipset: Intel 945G Express; Processor: Socket 775, Intel Smithfield Pentium D, Intel Prescott Pentium 4, Intel Celeron; Memory: 2x 400/533 MHz DDR2 SDRAM, 4 GB Max Total; Audio: Integrated 2.1 AC'97 Sound; Video: Integrated Intel GMA 950; Expansion Capabilities: 1x PCI 32bit, 1x PCI 32/64bit; Peripheral Interfaces: 1x SATA Connector, 1x VGA Monitor Connector, 1x Serial Connector, 1x Parallel Connector…

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SpecPicks Verdict

SpecPicks scored Genuine Dell Intel 945G Express Socket 775 Motherboard using a rating × review-volume × price-fit model applied to published specs and reviews across the retro motherboards category. Dell's retro motherboards lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for retro motherboards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • Genuine Dell Motherboard For Optiplex GX520 Desktop Systems
  • Chipset: Intel 945G Express; Processor: Socket 775, Intel Smithfield Pentium D, Intel Prescott Pentium 4, Intel Celeron; Memory: 2x 400/533 MHz DDR2 SDRAM, 4 GB Max Total
  • Audio: Integrated 2.1 AC'97 Sound; Video: Integrated Intel GMA 950
  • Expansion Capabilities: 1x PCI 32bit, 1x PCI 32/64bit
  • Peripheral Interfaces: 1x SATA Connector, 1x VGA Monitor Connector, 1x Serial Connector, 1x Parallel Connector, 1x RJ45 Ethernet/LAN Port, 6x back-panel USB 2.0–compliant connectors, 3x back panel audio connectors

Full Specifications

AudioIntegrated 2.1 AC'97 Sound; Video: Integrated Intel GMA 950
BrandDell
Weight945g
ConnectivityUSB
Expansion Capabilities1x PCI 32bit, 1x PCI 32/64bit

Ready to buy?

Genuine Dell Intel 945G Express Socket 775 Motherboard For Optiplex GX520 Desktop Systems Part Numbers: RJ291 is vintage hardware; the used and vintage market on eBay carries most of the live inventory. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. It also has an Amazon listing — check it for current price and availability. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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Genuine Dell Intel 945G Express Socket 775 Motherboard For Optiplex GX520 Desktop Systems Part Numbers: RJ291
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