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Green rectangular circuit board with gold edge connector and black memory chips on both sides

OWC

OWC 1S6D32R804GB 4GB DDR3 1600 CL11 2Rx8 204-pin 1.5V SODIMM memory upgrade

SKU CH-SPSQ-7ZQW4

4GB DDR3 1600 CL11 204-pin SODIMM module upgrades Lenovo B590 laptop memory

  • Total capacity4 GB
  • Rated speedDDR3 1600 (PC3 12800)
  • CAS latencyCL11
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • Boost responsiveness with 4GB DDR3 1600MHz upgrade
  • JEDEC-standard module ensures warranty-safe compatibility
  • CL11 latency and 1.5V voltage match OEM specs
  • 204-pin SODIMM fits Lenovo B590 laptops directly
  • Unbuffered non-ECC design installs as easy DIY project

Compatible upgrade for Lenovo B590

This 4 GB DDR3 SODIMM is built specifically for the Lenovo B590 laptop. It delivers a straightforward memory increase for owners of that model who need more capacity for everyday multitasking. The module follows the exact specification required by the system.

JEDEC-standard 204-pin unbuffered design

The stick uses a standard 204-pin DDR3 SO-DIMM form factor with no heat spreader, so it fits the slim memory slots found in the B590 and similar compact systems. Unbuffered, non-ECC operation at 1.5 V matches the platform's native electrical requirements without extra configuration.

Single 4 GB module tested in-house

OWC validates every module in its own lab and backs it with a limited lifetime warranty plus free technical support. The package contains only the memory stick itself; no tools, cables or software discs are included, keeping the upgrade simple for a DIY installation.

How it compares

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

Price $19.99
Cheaper than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $5.00 per GB
Cheaper than about 77% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number1S6D32R804 GB
Total capacity4 GB
Product type204-Pin DDR3 Non-ECC SODIMM
Performance
Rated speedDDR3 1600 (PC3 12800)
Memory
CAS latencyCL11
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsLenovo B590

Other versions of this model

5 more in the same range

Questions about this item

Does the DDR3 1600 (PC3-12800) interface cap real-world bandwidth?

The module is rated at DDR3 1600 with CL11 timing, and the JEDEC-standard PC3-12800 rating defines its maximum transfer rate.

What physical slot and clearance does the 204-pin SODIMM need in a Lenovo B590?

It fits a standard 204-pin DDR3 SODIMM socket and has no heat spreader, so it clears the factory retention clips in the B590.

Which step do DIY installers most often miss when seating this module?

Press the module in at the correct angle until both side clips snap shut automatically; a partial seat leaves the system unbootable.

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