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

OWC

OWC 4GB DDR3 1600 CL11 204-pin SODIMM memory upgrade for Dell XPS 14 L421X 15 L521X

SKU CH-V1M1-1Z8GB

4GB DDR3 1600 CL11 SODIMM upgrades Dell XPS 14 L421X and 15 L521X laptops

  • Capacity4GB
  • Type204-Pin DDR3 Non-ECC SODIMM
  • SpeedDDR3 1600 (PC3 12800)
  • CAS LatencyCL11
  • Voltage1.5V
  • ECCNo
  • 4GB DDR3 1600 SODIMM boosts multitasking on Dell XPS 14 L421X and 15 L521X
  • CL11 latency at 1600MHz keeps data flowing smoothly during heavy workloads
  • 5V unbuffered design meets JEDEC standards for stable, warranty-safe operation
  • Single 4GB 1Rx8 module installs easily in 204-pin laptop slots
  • ROHS compliant build tested to exceed OEM specifications for long-term reliability

Dell XPS 14 L421X and 15 L521X memory upgrade

This OWC 4GB DDR3 SODIMM module is built specifically for the Dell XPS 14 L421X and 15 L521X laptops. It delivers a JEDEC-standard PC3-12800 CL11 specification at 1.5V for a warranty-safe installation.

Replaces slower or smaller factory DDR3 SODIMMs

The jump is worth it when your current 1600MHz memory is limited to 4GB or less and multitasking causes frequent swapping. A single 4GB 1Rx8 stick adds immediate headroom for larger files and concurrent applications without changing voltage or latency.

Verify your laptop model

Confirm the service tag matches the XPS 14 L421X or XPS 15 L521X exactly, as other XPS generations use different pinouts or voltages. Check how many 204-pin SODIMM slots are free; this module is unbuffered non-ECC and will not work in systems requiring registered or ECC memory.

Points forts

  • 4GB DDR3 1600 SODIMM boosts multitasking on Dell XPS 14 L421X and 15 L521X
  • CL11 latency at 1600MHz keeps data flowing smoothly during heavy workloads
  • 5V unbuffered design meets JEDEC standards for stable, warranty-safe operation
  • Single 4GB 1Rx8 module installs easily in 204-pin laptop slots
  • ROHS compliant build tested to exceed OEM specifications for long-term reliability

Caractéristiques

BrandOWC
Part Number1S6D31R804GB
Capacity4GB
Type204-Pin DDR3 Non-ECC SODIMM
SpeedDDR3 1600 (PC3 12800)
CAS LatencyCL11
Voltage1.5V
ECCNo
Buffered/RegisteredUnbuffered
Rank1Rx8
Heat SpreaderNo
Compatible SystemDell XPS 14 L421X
Dell XPS 15 L521X

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Questions sur cet article

Will this 204-pin SODIMM fit the memory slot in a Dell XPS 14 L421X?

Yes, the module uses the standard 204-pin DDR3 SODIMM form factor required by the XPS 14 L421X and XPS 15 L521X.

What is the correct orientation when inserting this 1Rx8 DDR3 module?

Align the notch on the gold edge connector with the key in the slot, press firmly until the side clips click, and verify the 1.5V DDR3 1600 speed in BIOS.

Does this non-ECC SODIMM require any firmware updates or periodic cleaning?

No firmware updates are needed; the JEDEC-standard module runs maintenance-free, and only a rare reseat is required if the system fails to POST.

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