Head to head

Western Digital WD Black SN7100 2 TB vs WD_BLACK SN8100 1TB (without heatsink)

Our pick

Western Digital WD Black SN7100 2 TB

M.2 NVMe SSDs

Why this one

Choose the 2TB SN7100 for a larger file collection in a compatible M.2 2280 PCIe Gen4 slot.¹
It combines five-year warranty coverage with a 1,200TB rated write allowance; check the exact warranty terms against your expected writes.¹²

Read the review

Product photographs. Not to scale.

What WD_BLACK SN8100 1TB (without heatsink) offers

The 1TB SN8100 is the smaller-capacity choice in this range for a compatible M.2 2280 NVMe slot. Allow clearance for its 2.38mm bare-module height. Its limited warranty ends after five years or the 600TB write allowance, whichever comes first.³⁴

What differs

Specification	Western Digital WD Black SN7100 2 TB	WD_BLACK SN8100 1TB (without heatsink)
Capacity	2,000 GB¹	1,000 GB³
PCIe generation	Gen4¹	PCIe® GEN 5X4 NVMe™ 2.0³
DRAM cache	No¹	Yes³

More details

Specification	Western Digital WD Black SN7100 2 TB	WD_BLACK SN8100 1TB (without heatsink)
Sequential read speed	7,250 MB/s¹	Not published
Endurance	1,200 TB²	600 TB (Workload: Projected values using JEDEC client workload JESD219, as specified in manufacturer technical sheet)⁴
Sequential write speed	6,900 MB/s¹	Not published
Flash cell type	Tlc¹	Tlc³
Random read	1,000,000 IOPS¹	Not published
Warranty	5 years¹	5 years (Duration: 5 years or Max Endurance TBW limit, whichever occurs first; region-specific terms)³
M.2 form factor	M.2 2280¹	M.2 2280³