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Two green DDR3 DIMM sticks, 240-pin, no heat spreader

Computer Memory Solutions

Computer Memory Solutions CM5126412800DIMM 8GB (2x4GB) DDR3 1600MHz Dell Optiplex 790 memory upgrade

SKU CH-48M0-N9S4Q

8GB dual-channel DDR3 1600 MHz kit with two 4 GB unbuffered DIMMs for Dell Optiplex 790 desktops

  • Total capacity8 GB (2 × 4 GB)
  • Rated speedDDR3 1600 (PC3 12800)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL11
  • Memory timings11-11-11
  • Rated voltage1.5 V
  • 8GB dual-channel kit boosts multitasking headroom with two matched 4GB modules
  • 1600 MHz DDR3 speed delivers responsive desktop performance at PC3-12800 bandwidth
  • CL11 11-11-11 timing ensures low-latency data access for everyday workloads
  • 5 V unbuffered non-ECC design matches Dell OptiPlex 790 MT/DT/SFF specifications
  • 240-pin DIMM form factor fits the four available slots up to 32 GB total capacity

Dell Optiplex 790 upgrade kit

This two-module kit adds 8 GB of DDR3 memory to Dell Optiplex 790 MT, DT and SFF desktops. Each stick is a 4 GB unbuffered DIMM running at 1600 MHz with CL11 timings. The modules are non-ECC and operate at the standard 1.5 V for DDR3.

8 GB capacity with room to grow

The Optiplex 790 supports up to 32 GB across four slots, so this kit occupies half the sockets and leaves headroom for further expansion. Everyday office workloads and multitasking run comfortably within the 8 GB provided. Memory-intensive applications or large datasets may exceed the available capacity.

Two matched sticks for dual-channel operation

The pair is tested together to enable dual-channel bandwidth on the Optiplex 790 platform. No heat spreaders are included, keeping the modules low-profile for small-form-factor chassis. The kit contains only the two DIMMs; no additional cables, software or documentation are bundled.

How it compares

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

Price $21.99
Cheaper than about 89% 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 $2.75 per GB
Cheaper than about 91% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM5126412800DIMM
Total capacity8 GB (2 × 4 GB)
Product type240-Pin DDR3 SDRAM
Performance
Rated speedDDR3 1600 (PC3 12800)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL11
Memory timings11-11-11
ECC supportNo
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsDell Optiplex 790 Mt/Dt/Sff Desktops
In the box
Included items2 Memory RAM Sticks

Questions about this item

Will these two 4 GB DDR3 1600 modules run with the 4 GB sticks already in my OptiPlex 790?

Yes, they are built to the same 1.5 V, CL11 11-11-11 DDR3 1600 spec the 790 expects, so they will operate alongside existing modules at the system's default speed.

How can I confirm the kit is running at 1600 MHz with CL11 timings after installation?

Open Task Manager's Performance tab or run CPU-Z; both will show each stick at 1600 MHz with 11-11-11 latency when the system is using the full 8 GB kit.

The box lists two 240-pin DIMMs — do I need any extra brackets or cables for the OptiPlex 790 SFF?

No, the 240-pin DIMMs seat directly into the motherboard slots; the 790 SFF uses standard desktop memory sockets so nothing else is required.

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