Zadak TWSG4S 2Tb NVMe detailed review

Posted on December 19, 2022 by Raymond Chen

Zadak's TWSG4S internal SSD use PCIe M.2 4.0 x 4 expansion standard. Read below about this SSD on our page.

Zadak TWSG4S 2Tb NVMe detailed review

Zadak TWSG4S 2Tb is powered by Phison PS5018-E18. The TWSG4S comes equipped with 3D Nand memory. This drive also available in 1 Tb and 512 Gb capacities.

Performance and benchmarks

Internal SSD use PCIe M.2 4.0 x 4 computer expansion bus standard with sequential read speeds 7400 MB/s, and maximum write speeds equals to 7000 Mbps. TWSG4S has IOPS 1000000 on writing and 1000000 on reading operations per second.

Endurance and warranty

Manufacturer provide 5 years warranty for this product that limited by endurance 1400 Total Bytes Written.


Category Value
Capacity 2 Tb
Interface M.2 4.0 x 4
Controller Phison PS5018-E18
Memory type 3D Nand
DRAM n/a
Read speed (Mb/s) 7400
Write speed (Mb/s) 7000
Read IOPS 1000000
Write IOPS 1000000
Endurance (TBW) 1400
MTBF (million hours) n/a
Warranty (years) 5


Zadak TWSG4S 2Tb support PCIe 4 that is twice faster than PCIe 3.0. The maximum write speed is 7000 Mb/s, that is faster than has other competitors. The NVMe SSD can write 1400 TBW, that is pretty good in comparison with competitors. When everything is weighed in the balance, we highly recommend to buy Zadak TWSG4S 2Tb for your PC.

+ Pros

  • Excellent writing speed
  • PCIe 4.0
  • Capacity
  • Endurance

- Cons

  • None

Buy this or similar SSD:

Video Review

TWSG4S M.2 PCIe Gen4 x4 SSD


The Zadak TWSG4S 2Tb has no dynamic random-access memory (DRAM) in their controller or information about it is not known. DRAM in their controller help to increase endurance and input/output performance.

The TWSG4S 2Tb due to the high density of memory chips you need to install of extra heat sink. It reduce temperature of the memory chips and controller. Some laptops or motherboards from the factory has thermal pads below or above the drive for improving performance during heavy loads.

The TWSG4S 2Tb has write speed 7000 Mbps, sequential read speed 7400 Mb/s. NVMe works on Phison PS5018-E18 controller and M.2 4.0 x 4 high-speed serial computer expansion bus standard. The flash memory type is 3D Nand.
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