SamsungSSDInternalNVMeGEN 3
Samsung PM991 256GB NVMe
A compact NVMe M.2 SSD built for everyday computing, this 256GB drive slots into most laptops and desktops using the PCIe Gen 3 interface. It's a solid choice for faster boot times and general file handling, though the lack of DRAM cache means sustained write performance takes a hit on large transfers. Best suited for users upgrading from a traditional hard drive who want a noticeable speed boost without breaking the bank.
Specifications
Capacity
256 GB
Drive Type
SSD
Interface
The physical connection to your computer, console, or camera. NVMe is typically fastest, but SATA, USB, and SD speeds vary a lot between products, check the Read Speed row too.
NVMe
Form Factor
The drive's physical size and shape. M.2 is a slim stick for modern SSDs, 2.5″ and 3.5″ are older cased formats.
M.2 2242
Read Speed
How fast data can be read from the drive. Higher is better, especially for boot times and load screens.
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Write Speed
How fast data can be written to the drive. Matters most for copying large files, recording video, or heavy multitasking.
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PCIe Gen
Each PCIe generation roughly doubles the drive's top speed. Your motherboard needs to support it too.
Gen 3
NAND Type
TLC is the mainstream flash type with a solid balance of speed and endurance. QLC costs less per gigabyte but slows more under heavy writes.
TLC
DRAM Cache
A DRAM cache gives steadier performance under heavy or random workloads. Drives without one are usually fine for everyday use.
No
Sided
Whether the flash chips are mounted on one side of the circuit board or both. Single-sided drives fit in more laptops and handhelds with tight internal clearance, and their heatsinks are an easier fit in the PS5's expansion bay too.
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Placement
Internal
Warranty
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