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Two green DDR3 DIMM sticks, black chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions CM5126412800DIMM 8GB (2x4GB) DDR3 1600MHz CL11 memory upgrade

SKU CH-TPZC-V99FJ

8GB dual-channel DDR3 kit with two 4GB DIMMs at 1600MHz CL11 for compatible Gateway 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 on Gateway SX2855-UR20P, SX2855-UR21P, SX2865-UR26
  • 1600 MHz DDR3 speed matches PC3-12800 spec for responsive desktop performance
  • CL11 11-11-11 timing at 1.5 V delivers stable operation without voltage tuning
  • 240-pin unbuffered non-ECC DIMMs install directly into the two available memory slots
  • Major-brand DRAM chips backed by limited lifetime warranty against manufacturing defects

Compatibility Targeted Upgrade

This 8 GB kit uses two 4 GB DDR3 modules rated at 1600 MHz with CL11 timing. It is built specifically for Gateway SX2855-UR20P, SX2855-UR21P and SX2865-UR26 desktops. The 240-pin DIMMs run at 1.5 V and are unbuffered non-ECC.

Who Should Choose This

Owners of the listed Gateway models who need to reach the 8 GB maximum will find the correct configuration here. Builders working with other platforms or requiring ECC, registered modules or a different voltage should look elsewhere.

Deciding Specification

The modules are DDR3 1600 (PC3 12800) with 11-11-11 latency. If your system demands DDR3 1600 unbuffered non-ECC DIMMs in a two-slot layout, this kit matches that requirement.

How it compares

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

Price $20.99
Cheaper than about 90% 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 $2.62 per GB
Cheaper than about 91% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

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 systemsGateway SX2855-UR20P, SX2855-UR21P, SX2865-UR26
In the box
Included items2 Memory RAM Sticks

Questions about this item

Will the 240-pin DDR3 DIMMs fit the two memory slots in my Gateway SX2855-UR20P?

Yes, the kit is built for the two DIMM sockets in the Gateway SX2855-UR20P, SX2855-UR21P and SX2865-UR26 and matches the 240-pin DDR3 form factor those systems use.

What is the correct way to seat both 4 GB modules so the firmware recognises the full 8 GB?

Power off the PC, open the case, align each module's notch with the slot key, press down firmly until the side clips click on both sticks, then boot to confirm 8 GB appears in BIOS.

When should I expect to replace these CL11 1.5 V sticks?

DDR3 modules have no moving parts and typically last the life of the Gateway SX2855 or SX2865; replace only if memory errors appear or a future upgrade demands more capacity.

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