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Rectangular black metal power supply unit with fan grille and bundled cables visible

Ruth's sister

Ruth's sister L300PM-01 300W ATX internal power cable

SKU CH-V69D-40W3X

A 300W ATX power supply with Active PFC, 24-pin motherboard, 4-pin CPU and four SATA connectors for OptiPlex MT desktops

  • 300 W output powers compatible Dell OptiPlex and Inspiron desktops
  • Active PFC improves efficiency across 100-264 V input range
  • Four SATA connectors supply multiple drives from one unit
  • Fixed 24-pin ATX and 4-pin CPU cables simplify installation
  • CE certified for European safety compliance

Product identity

The Ruth's sister L300PM-01 is a 300W ATX power supply with active PFC and a non-modular design. It delivers a 24-pin motherboard connector, a 4-pin CPU connector and four SATA power ports for desktop or server builds.

Replacement guidance

This unit replaces Dell part numbers L265AM-00, HU265AM-00, HU275AM-00, L275AM-00 and AC275AM-00 in OptiPlex 390, 790, 990, 3010, 7010 and 9010 MT chassis as well as Inspiron 660 systems. The upgrade is worthwhile when the original supply has failed or when a direct 300W replacement with the same connector layout is required.

Compatibility checklist

Verify that your chassis accepts a 150 × 140 × 86 mm ATX supply and that the motherboard uses a 24-pin main power socket plus a 4-pin CPU socket. Confirm the system runs on 100-264 V input and that no PCIe power connectors are needed for the installed graphics card.

How it compares

Measured against everything we stock in Internal PSU & Riser Cables, at today’s prices. Recalculated every night.

Price $47.99
Pricier than about 82% of the 7,839 comparable items (median $14.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Will the 150 × 140 × 86 mm L300PM-01 fit my OptiPlex 7010 MT chassis?

The unit measures 150 × 140 × 86 mm and is listed for OptiPlex 390 790 990 3010 7010MT large chassis, so it matches the 7010 MT form factor.

Which cables must I connect during installation, and which step is often missed?

Connect the 24-pin motherboard cable (30 cm), the 4-pin CPU cable (17 cm) and up to four SATA drives; the 4-pin CPU connector is the one builders most often forget.

When should I plan to replace the non-modular L300PM-01 in a desktop running daily?

With active PFC and 80 PLUS Other certification, a typical desktop unit lasts five to seven years; replace it if fan noise rises, voltages drift or the system becomes unstable.

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