We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
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

  • Capacity4GB
  • Type204-Pin DDR3 Non-ECC SODIMM
  • SpeedDDR3 1600 (PC3 12800)
  • CAS LatencyCL11
  • Voltage1.5V
  • ECCNo
  • 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.

Highlights

  • 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

Specifications

BrandOWC
Part Number1S6D32R804GB
Capacity4GB
Type204-Pin DDR3 Non-ECC SODIMM
SpeedDDR3 1600 (PC3 12800)
CAS LatencyCL11
Voltage1.5V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
Heat SpreaderNo
Compatible SystemLenovo B590

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

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.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.