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Two green circuit boards with gold contacts and black chips

Computer Memory Solutions

Computer Memory Solutions 8GB (2x4GB) DDR3 1333MHz SODIMM Lenovo B590

SKU CH-49ZE-ZEGR5

8GB DDR3 kit with two 4GB SODIMM modules rated at 1333MHz CL7 for Lenovo B590 notebooks

  • Total capacity8 GB (2 × 4 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL7
  • Memory timings7-7-7
  • Rated voltage1.5 V
  • 8GB kit lets Lenovo B590 handle more tasks
  • DDR3 1333 MHz speed matches system spec
  • CL7 timing keeps data flowing smoothly
  • Two 4 GB sticks fill both slots
  • 5 V unbuffered modules install without changes

Lenovo B590 DDR3 SO-DIMM Kit

This 8GB kit contains two 4GB DDR3 SO-DIMM modules built for the Lenovo B590 series. Each stick uses a 204-pin interface and runs at 1333MHz with CL7 timing. The unbuffered, non-ECC design suits standard laptop memory slots. Buyers needing higher capacity or a different DDR generation should look elsewhere.

Low-Voltage Unbuffered Operation

The modules operate at 1.5V without a heat spreader, drawing minimal power inside a thin-and-light chassis. Unbuffered signalling keeps electrical load low on the memory controller. Silent passive cooling produces no audible noise during typical workloads. Systems limited to 32-bit operating systems will only address 4GB of the installed 8GB.

1333MHz CL7 Speed Grade

The decisive specification is the DDR3-1333 (PC3-10600) rating with 7-7-7 latency. This exact speed and timing must match the B590 memory controller for stable operation. Faster or slower modules may not post or could force down-clocking. Verify the 1333MHz CL7 requirement before purchase.

How it compares

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

Price $35.99
Cheaper than about 82% 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 $4.50 per GB
Cheaper than about 81% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM5126410600SODRH
Total capacity8 GB (2 × 4 GB)
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL7
Memory timings7-7-7
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsLenovo B590 Series
In the box
Included items2 Memory RAM Sticks

Questions about this item

How do I install the 204-pin DDR3 SODIMM modules into the Lenovo B590, and what step is often missed?

Power off the laptop, remove the battery if accessible, open the memory compartment, insert each module at an angle until the gold contacts disappear, then press down firmly until both side clips click — the click is the step people skip, leaving the stick loose.

What maintenance or replacement will the CM5126410600SODRH kit need over time?

No routine maintenance is required; the unbuffered non-ECC modules have no heat spreader or moving parts, so replacement is only necessary if a stick fails or you upgrade beyond the two-slot, 8 GB maximum supported by the B590.

What limit appears first when the B590 runs sustained workloads with this 1333 MHz CL7 memory?

The memory controller caps bandwidth at the DDR3-10600 rate, so throughput plateaus there; latency stays at 7-7-7 timing, and the 1.5 V supply prevents higher speeds without instability.

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