Kingston NV2 250GB

The Kingston NV2 250GB is an entry-level PCIe 4.0 NVMe drive that uses a DRAM-less architecture with Host Memory Buffer (HMB). Its internal bill of materials varies; while it connects as Gen4 x4, the controller is typically a mid-range unit such as the Phison PS5021-E21T or Silicon Motion SM2267XT, and NAND may be either 3D TLC or QLC. The 250GB model has limited write throughput due to reduced die interleaving, and in practice it often performs like a "Gen 3.5" drive: it negotiates a Gen4 link but its sequential speeds (around 3,000 MB/s read) barely saturate PCIe 3.0. Unannounced component revisions mean thermal behavior and sustained write performance after the pseudo-SLC cache is saturated can vary depending on whether a unit uses QLC or TLC.

Key Specifications

• Interface: PCIe 4.0 x4 (NVMe 1.4)
• Controller: Variable (Phison PS5021-E21T, SM2267XT, or equivalent)
• NAND Type: Variable (High-density 3D TLC or QLC)
• Sequential Read: 3,000 MB/s
• Sequential Write: 1,300 MB/s
• DRAM Cache: None (HMB Architecture)
• Form Factor: Single-sided M.2 2280

Hardware Alternatives

• Crucial P3 Plus: Shares the architectural philosophy of pairing QLC NAND with a DRAM-less controller for entry-level PCIe 4.0 connectivity, resulting in similar endurance and sustained write limitations.
• Western Digital WD Blue SN580: A direct competitor in the DRAM-less Gen4 segment with comparable throughput metrics but typically a fixed hardware configuration using BiCS TLC and a proprietary SanDisk controller design.
• TeamGroup MP44L: Often utilizes the same Phison E21T controller found in some NV2 revisions; generally configured with TLC NAND, offering a different endurance profile despite the shared controller logic.