WESTERN DIGITAL SN740 256gb 512GB 1TB 2TB WESTERN DIGITAL SN 7100 500GB Hard Drive M.2 2230 NVMe PCIe Gen 4×4 Solid State Drive for Pc Laptop & Desktop

WESTERN DIGITAL SN740 256gb 512GB 1TB 2TB WESTERN DIGITAL SN 7100 500GB Hard Drive M.2 2230 NVMe PCIe Gen 4×4 Solid State Drive for Pc Laptop & Desktop

Here’s a comparison table for the Western Digital SN740 (256GB, 512GB, 1TB, 2TB) and the Western Digital SN7700 (500GB):

Specification	WD SN740 256GB	WD SN740 512GB	WD SN740 1TB	WD SN740 2TB	WD SN7700 500GB
Form Factor	M.2 2230/2280	M.2 2230/2280	M.2 2230/2280	M.2 2230/2280	M.2 2280
Interface	PCIe Gen4 x4 (NVMe)	PCIe Gen4 x4 (NVMe)	PCIe Gen4 x4 (NVMe)	PCIe Gen4 x4 (NVMe)	PCIe Gen4 x4 (NVMe)
Sequential Read	~3,500 MB/s	~5,150 MB/s	~5,150 MB/s	~5,150 MB/s	~6,000 MB/s
Sequential Write	~2,000 MB/s	~4,850 MB/s	~4,850 MB/s	~4,850 MB/s	~4,000 MB/s
Random Read (4K)	~340K IOPS	~550K IOPS	~800K IOPS	~800K IOPS	~500K IOPS
Random Write (4K)	~450K IOPS	~600K IOPS	~1,000K IOPS	~1,000K IOPS	~700K IOPS
DRAM Cache	No (HMB)	No (HMB)	No (HMB)	No (HMB)	Yes
NAND Type	TLC	TLC	TLC	TLC	TLC
Endurance (TBW)	~200 TBW	~300 TBW	~600 TBW	~1,200 TBW	~300 TBW
Power Consumption	Low (Active: ~4W)	Low (Active: ~5W)	Low (Active: ~5W)	Low (Active: ~6W)	Moderate (~5.5W)
Use Case	OEM/Embedded	OEM/Embedded	OEM/Embedded	OEM/Embedded	Consumer/Prosumer

Western Digital SN740 (OEM/Embedded SSD) – 256GB, 512GB, 1TB, 2TB

The WD SN740 is a high-performance PCIe Gen4 NVMe SSD designed for OEM and embedded systems, making it a popular choice for ultrabooks, handheld gaming devices (like the Steam Deck), and industrial applications.

Key Features:

✅ PCIe Gen4 x4 NVMe – Delivers fast sequential speeds up to 5,150 MB/s read and 4,850 MB/s write (for 512GB+ models).
✅ Compact Form Factor – Available in M.2 2230 (30mm) and M.2 2280 (80mm) sizes, ideal for space-constrained devices.
✅ DRAM-less (HMB Support) – Uses Host Memory Buffer (HMB) for efficient performance without a dedicated DRAM cache.
✅ Low Power Consumption – Optimized for battery-powered devices, making it great for laptops and portable gaming.
✅ TLC NAND – Balances performance and endurance with 200 TBW (256GB) up to 1,200 TBW (2TB).

Best For:

• • • Handheld gaming PCs (Steam Deck, ASUS ROG Ally)
    • Ultrabooks & business laptops
    • Industrial/embedded storage solutions

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Western Digital SN7700 500GB (Consumer SSD)

The WD SN7700 is a consumer-focused PCIe Gen4 SSD with higher peak speeds and DRAM cache, making it a better choice for desktop PCs and power users.

Key Features:

🔥 Faster Sequential Speeds – Up to 6,000 MB/s read and 4,000 MB/s write, outperforming the SN740 in raw throughput.
🔥 DRAM Cache – Improves sustained performance and responsiveness compared to DRAM-less SSDs.
🔥 M.2 2280 Only – Designed for standard desktop/laptop slots (not compact 2230).
🔥 Higher Endurance – 300 TBW (for 500GB model), suitable for heavy workloads.
🔥 TLC NAND – Reliable and efficient for everyday computing and gaming.

Best For:

• • • Gaming PCs & workstations
    • Content creators & power users
    • General desktop/laptop upgrades

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Which One Should You Choose?

• • For handhelds/small devices → WD SN740 (due to 2230 size & efficiency).
  • For desktops/high-speed needs → WD SN7700 (better peak speeds & DRAM).