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Green rectangular M.2 2280 SSD with black label and gold contacts

HP

HP L18845-001 256GB M.2 2280 PCIe 3.0 x4 internal SSD

SKU CH-1EGQ-YGGEH

256 GB M.2 2280 internal SSD with PCIe 3.0 x4 interface and WD SN520 controller

  • Device TypeInternal Solid State Drive (SSD)
  • Form FactorM.2 2280
  • Capacity256GB
  • InterfacePCI-Express 3.0 x4
  • ControllerWestern Digital
  • 256 GB capacity for fast boot and app loads
  • PCIe 3.0 x4 interface delivers high sequential throughput
  • M.2 2280 form factor fits standard laptop slots
  • NVMe protocol reduces latency for responsive performance
  • WD SN520 controller optimises power efficiency for mobile use

HP L18845-001 256GB M.2 2280 PCIe 3.0 x4 Internal

This HP L18845-001 is a 256GB internal solid state drive built for laptops and desktops with an M.2 2280 slot. It uses a Western Digital PC SN520 controller to deliver solid-state speed for everyday workloads. The drive installs directly into the motherboard without cables. It suits system builders and upgraders who need reliable capacity in a compact form factor.

PCIe 3.0 x4 interface limits

The drive connects through a PCI Express 3.0 x4 interface, so its maximum throughput is bounded by that generation's lane bandwidth. If the host platform only provides PCIe 2.0 or a x2 electrical link, the SSD will operate at the slower link speed. The M.2 2280 form factor fits the standard keyed slot, but the slot must support PCIe signalling rather than SATA only. NVMe is the protocol used over this PCIe link.

Capacity decides fit

The single specification that determines whether this is the right part is the 256GB capacity. That figure fixes the total addressable space for the operating system, applications and user data. Choose this drive only when 256GB matches the storage budget for the target build. The model identifier SDAPNUW-256G-1006 confirms the capacity and controller pairing.

Highlights

  • 256 GB capacity for fast boot and app loads
  • PCIe 3.0 x4 interface delivers high sequential throughput
  • M.2 2280 form factor fits standard laptop slots
  • NVMe protocol reduces latency for responsive performance
  • WD SN520 controller optimises power efficiency for mobile use

Specifications

Device TypeInternal Solid State Drive (SSD)
Form FactorM.2 2280
Capacity256GB
InterfacePCI-Express 3.0 x4
ControllerWestern Digital

Questions about this item

Should I pick the 256GB version or is there a larger capacity available?

This drive is offered in a single 256GB capacity so there is no larger option to select from the same listing

What does the PCIe 3.0 x4 label mean for everyday read and write speeds?

PCIe 3.0 x4 sets the maximum theoretical bandwidth at about 4 GB/s so real world sequential transfers will top out near that ceiling

Is this M.2 2280 drive NVMe or SATA and what does that limit in practice?

The drive uses the NVMe protocol over PCIe 3.0 x4 so it is not limited by the SATA 6 Gbps bottleneck that affects M.2 SATA modules

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