Crucial T705 4000GB

The Crucial T705 represents the maturation of the PCIe 5.0 NVMe ecosystem, utilizing the Phison PS5026-E26 controller paired with Micron’s 232-layer B58R 3D TLC NAND. It increases the NAND interface transfer rate to approximately 2400 MT/s, allowing the hardware to nearly saturate the theoretical bandwidth of the PCIe 5.0 x4 bus. The 4TB variant utilizes a dedicated LPDDR4 DRAM cache to manage the expanded logical-to-physical mapping table, essential for maintaining random I/O consistency at this density. Thermal management is the critical operational constraint for the T705; the Phison E26 controller has a high thermal design power relative to the M.2 form factor and can rapidly reach thermal throttle points (typically around 81°C) without substantial heatsinking or active cooling. The drive is DirectStorage optimized, and the 4TB model is double-sided, which may present clearance issues in ultra-thin laptops or recessed M.2 slots.

Key Specifications

• Capacity: 4000GB
• Interface: PCIe 5.0 x4, NVMe 2.0
• Controller: Phison PS5026-E26 (12nm process)
• NAND Flash: Micron 232-Layer 3D TLC (B58R)
• NAND interface transfer rate: ~2400 MT/s
• Max Sequential Read: 14,100 MB/s
• Max Sequential Write: 12,600 MB/s
• DRAM Cache: Yes (LPDDR4, dedicated on 4TB variant)
• Encryption: TCG Opal 2.01 support
• Physical Layout: M.2 2280, Double-sided PCB (4TB variant)

Hardware Alternatives

• Crucial T700 4000GB: The direct architectural predecessor using the same controller and NAND hardware but with a slower flash interface (~2000 MT/s), yielding lower peak sequential speeds (around 12,400 MB/s).
• Corsair MP700 PRO SE 4000GB: A hardware relative based on the same Phison E26 ecosystem offering similar peak performance, with manufacturer firmware tuning that may affect thermal throttling curves and sustained write behavior.
• Samsung 990 PRO 4000GB: A competitor with a proprietary architecture limited to PCIe 4.0; it has lower sequential speed ceilings but competes on random 4K latency and power/thermal efficiency, often showing better thermal management.