Sequential read (up to MB/s): MZ-76E4T0 lists 550; MZ-77Q4T0 lists 560.
Manufacturer limited warranty: MZ-76E4T0 lists 5 years or TBW limit, whichever comes first; MZ-77Q4T0 lists 3 years or TBW limit, whichever comes first.
Sequential write (up to MB/s): MZ-76E4T0 lists 520; MZ-77Q4T0 lists 530.

A larger cache, higher RPM or higher advertised sequential speed alone does not establish which drive is better for your workload.

Specifications side by side

Show differences only

Manufacturer specifications for MZ-76E4T0 and MZ-77Q4T0
Specification	MZ-76E4T0	MZ-77Q4T0
Manufacturer	Samsung	Samsung
Product family	860 EVO	870 QVO
Model number	MZ-76E4T0	MZ-77Q4T0
Capacity (TB)	4	4
Interface	SATA 6 Gb/s	SATA 6 Gb/s
Form factor	2.5-inch	2.5-inch
Endurance (TBW)	2400	Not recorded
Sequential read (up to MB/s)	550	560
Manufacturer limited warranty	5 years or TBW limit, whichever comes first	3 years or TBW limit, whichever comes first
Sequential write (up to MB/s)	520	530

Compatibility and buying checks

Sequential speeds are manufacturer maxima, not measured game load times. Check your PCIe generation, M.2 dimensions and cooling clearance. The lower of the time or endurance limit normally governs a limited SSD warranty.
Compare new and renewed offers separately. The manufacturer specification does not guarantee the warranty or return policy of a marketplace seller.

Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.

Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.