fanxiang S501Q 1TB NVMe M.2 SSD: features, specs and who it suits

The fanxiang S501Q is a 1TB internal solid state drive in the M.2 2280 size, using the NVMe protocol over a PCIe 3.0 x4 connection. It is meant as a storage drive or upgrade for laptops and desktops that have a compatible M.2 slot.

What M.2 NVMe and PCIe 3.0 mean

M.2 2280 refers to the physical shape: a stick 22 mm wide and 80 mm long. NVMe is the protocol, and it is faster than the older SATA interface. PCIe 3.0 x4 is the link, using four lanes, which tops out at roughly 3,500 MB/s in practice. fanxiang rates the S501Q at up to 3,500 MB/s reads and 2,500 MB/s writes, which fits that ceiling. A PCIe 4.0 or 5.0 slot will also accept it but runs it at 3.0 speed.

QLC NAND and SLC cache

The drive uses 3D NAND with QLC (quad-level cell) memory, which stores four bits per cell. QLC generally allows high capacity at lower cost, but is typically slower to write sustained data than TLC. To offset that, SSDs use an SLC cache: part of the drive works in a faster mode to absorb bursts of writes. Rated peak speeds apply to those bursts. Sustained writes of large files may slow once the cache fills, especially when the drive is near full.

Endurance and warranty

fanxiang lists up to 320TBW (terabytes written), a measure of how much data the drive is rated to take over its life. For ordinary home and office use that is a large amount. The brand offers a 5-year warranty, and the package includes installation screws and a screwdriver.

Heat

fanxiang says graphene heat dissipation stickers help control temperature. Some laptops and motherboards have their own heatsink covers for M.2 drives; check whether a sticker and a heatsink would be too thick together.

Compatibility

The listing names Windows 7, 8, 10 and 11 and macOS 10.9 or later, and says it works with laptops, desktops and all-in-ones as long as the motherboard has an M.2 interface. Always confirm the slot supports NVMe, since some M.2 slots are SATA-only.

Who it suits

It suits people replacing a slow hard drive or SATA SSD, adding game or project storage, or refreshing an older PC with a PCIe 3.0 slot.

What to check before you buy

• Slot type: confirm an M.2 slot with NVMe (PCIe) support and room for a 2280 drive.
• Existing data: plan to clone or reinstall the operating system. Back up first.
• Consoles and special devices: check the maker's list if you plan to use it in a console or other device.
• Use pattern: heavy, sustained writes suit TLC drives better than QLC.
• Spare capacity: leave free space for best performance.

The short version

• 1TB M.2 2280 NVMe SSD, PCIe 3.0 x4, QLC 3D NAND with SLC cache.
• Rated up to 3,500 MB/s reads and 2,500 MB/s writes.
• 320TBW endurance and a 5-year warranty.
• Works with Windows 7 to 11 and macOS 10.9 or later, with a compatible M.2 slot.

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