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Two green DDR3 DIMM sticks, no heat spreaders

Computer Memory Solutions

Computer Memory Solutions 8GB (2x4GB) DDR3 1333 MHz CL9 240-Pin DIMM Dell OptiPlex 780 memory upgrade

SKU CH-YP34-0RSTX

8GB DDR3 1333 MHz dual-channel kit upgrades Dell OptiPlex 780 desktops with two 4GB unbuffered modules

  • Total capacity8 GB (2 × 4 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL9
  • Memory timings9-9-9
  • Rated voltage1.5 V
  • 8GB kit doubles capacity for Dell OptiPlex 780
  • DDR3 1333 MHz CL9 matches system spec
  • 240-pin unbuffered DIMMs install in standard slots
  • 5 V operation keeps power draw low
  • Two 4 GB modules enable dual-channel performance

Dell OptiPlex 780 memory kit

This 8 GB kit contains two 4 GB DDR3 modules built for Dell OptiPlex 780 desktop, mini-tower and small-form-factor systems. The 240-pin DIMMs install directly into the four available slots without adapters. Computer Memory Solutions tests each stick for compatibility with the listed platforms.

Sustained operation at 1333 MHz

Rated at DDR3-10600 with CL9 9-9-9 timings, the modules run at the standard 1.5 V without heat spreaders. Unbuffered, non-ECC organisation and 2Rx8 rank structure keep latency predictable during long workloads. The major-brand chipset maintains stability across extended sessions.

BIOS revision A15 required

The system must run BIOS version A15 before these modules are installed; earlier revisions will not recognise the full 8 GB capacity. Four slots support a maximum of 16 GB total, so this kit leaves two slots open for future expansion. Buyers needing 16 GB in a single kit cannot use this product.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $38.99
Cheaper than about 81% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB (2 × 4 GB)
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $4.87 per GB
Cheaper than about 78% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM5126410600DIMM
Total capacity8 GB (2 × 4 GB)
Product type240-Pin DDR3 SDRAM
Performance
Rated speedDDR3 1333 (PC3 10600)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL9
Memory timings9-9-9
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsDell Optiplex 780 Dt / Mt / Sff Desktops
In the box
Included items2 Memory RAM Sticks

Questions about this item

Does the 1.5V DDR3 kit run hot or loud inside a Dell OptiPlex 780 when the system is under load all day?

These unbuffered DIMMs have no heat spreader and draw only 1.5V, so they add minimal heat and make no noise of their own; the case fans will determine overall thermals.

What BIOS version must the OptiPlex 780 already have before I install these two 4GB modules?

The supplier notes the BIOS should be updated to A15 before fitting the 8GB kit, otherwise the system may not recognise the full capacity.

Can I keep the original 2GB sticks in the other two slots alongside this 2Rx8 kit to reach 12GB total?

The OptiPlex 780 supports four DIMM slots and a 16GB maximum, so mixing the existing modules with this CL9 1333 MHz pair will work as long as the combined total does not exceed 16GB.

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