Is the 4TB drive a single sided Chip? Are there chips on the bottom that make it to tight to put in a 13 inch Dell XPS Laptop? I am asking about the 4TB model....

Chips are on both sides for the 4TB model.

what are its NAND chips and controller chips?

3D TLC NAND, Realtek RTS5762 controller.

Questions & Answers: XPG SX8100 Series: 4TB M.2 NVMe 3D NAND Gen3 Gaming Internal SSD

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XPG SX8100 Series: 4TB M.2 NVMe 3D NAND Gen3 Gaming Internal SSD

Performance (Max) Read 3500 MB/s, Write 3000 MB/s
Interface PCIe Gen3x4 Form Factor M.2 2280
NAND Flash: 3D NAND
MTBF: 2,000,000 hours

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