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PNY CS3250 4TB specifications and in-depth review

PNY CS3250 4TB

Manufacturer: PNY

The PNY CS3250 4TB is a high-capacity M.2 NVMe solid-state drive built around the PCIe 5.0 interface, offering sequential read speeds of up to 14900 MB/s. It comes without an integrated heatsink or RGB lighting, keeping the design straightforward and focused on storage performance. The drive carries a five-year warranty and uses HMB (Host Memory Buffer) caching in place of dedicated DRAM.

Under the hood, the CS3250 4TB is powered by the Phison PS5028-E28-86 controller, which operates across 8 channels and manages 4000GB of TLC NAND flash storage. Sequential write performance reaches up to 14000 MB/s, and the NVMe protocol ensures low-latency communication over the PCIe 5.0 lane. These specifications reflect a drive designed to take full advantage of the latest generation of M.2 slots available on compatible platforms.

Pros
  • Sequential read speed of 14900 MB/s and sequential write speed of 14000 MB/s indicate strong throughput for large file transfers
  • PCIe 5.0 interface allows the drive to utilize the latest generation of M.2 slots for maximum bandwidth
  • The Phison PS5028-E28-86 controller operates across 8 channels, supporting efficient data handling across the full 4TB capacity
  • 4000GB of storage capacity provides substantial space for large workloads, game libraries, or media collections
  • A five-year warranty period offers long-term coverage for the drive
Cons
  • No integrated heatsink, which may require users to source a separate cooling solution when sustained workloads are expected
  • Relies on HMB (Host Memory Buffer) rather than dedicated DRAM, which can affect performance consistency under certain workload patterns
  • TLC NAND, while common in high-capacity drives, generally offers lower endurance per cell compared to MLC-based alternatives
Who is this for?

This drive is well-suited to users who need high-throughput storage for large file operations, such as video editors, data engineers, or content creators regularly moving multi-gigabyte files. The PCIe 5.0 interface combined with 4TB capacity makes it a strong fit for workstations or gaming rigs built on platforms that support the latest M.2 specification, where the full bandwidth of the connection can be utilized. Those who want long-term storage reliability will also appreciate the five-year warranty backing the drive.

Who is this NOT for?

Users building systems on older motherboards without PCIe 5.0 M.2 slots will not be able to take advantage of the drive's peak sequential speeds, making it a poor match for legacy platforms. Since the drive lacks an integrated heatsink, it is less suited to compact or thermally constrained builds where sustained workloads could lead to throttling without an aftermarket cooling solution. Additionally, workloads that demand consistent random I/O performance at high queue depths — such as enterprise-grade database operations — may find the HMB-based caching architecture less reliable than a dedicated DRAM buffer design.

Read speed:

sequential read speed 14900 MB/s

The PNY CS3250 4TB reaches a sequential read speed of 14900 MB/s, reflecting the throughput available when reading large, contiguous blocks of data under optimal conditions.

Write speed:

sequential write speed 14000 MB/s

The PNY CS3250 4TB supports a sequential write speed of 14000 MB/s, representing the sustained throughput achievable when writing large, contiguous data streams under optimal conditions.

Benchmarks:

General info:

type M2
SSD cache HMB (Host Memory Buffer)
Is an NVMe SSD ✓
internal storage 4000GB
controller Phison PS5028-E28-86
SSD storage type TLC
PCI Express (PCIe) version 5
Controller channels 8
warranty period 5 years
Has an integrated heatsink ✕
has RGB lighting ✕

The PNY CS3250 4TB is an M.2 NVMe SSD with 4000GB of internal storage formatted using TLC NAND flash. It connects via PCIe 5.0 and is managed by the Phison PS5028-E28-86 controller operating across 8 channels. Instead of dedicated DRAM, the drive relies on HMB (Host Memory Buffer) caching to assist with data management. The unit ships without an integrated heatsink and has no RGB lighting. A five-year warranty is included.

Final Verdict

The PNY CS3250 4TB is a high-capacity M.2 NVMe drive built specifically for platforms that can harness the full potential of PCIe 5.0 bandwidth, delivering sequential read and write speeds that place it firmly in the upper tier of consumer storage solutions. With 4TB of TLC-based storage managed by an 8-channel Phison controller and backed by a five-year warranty, it offers a compelling combination of capacity and throughput for demanding workloads. That said, users should be mindful of its reliance on HMB caching and the absence of an integrated heatsink, both of which call for careful system planning. For those with a compatible, well-cooled platform and a need for sustained large-file performance, the CS3250 4TB represents a focused and capable storage option.

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