Samsung 990 EVO NVMe M.2
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Samsung 990 EVO NVMe SSD with a hybrid PCIe 4.0 x4 / PCIe 5.0 x2 interface and a DRAM-less design.
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About this product
The Samsung 990 EVO is a hybrid NVMe SSD that can operate as either a four-lane (x4) PCIe 4.0 drive or a two-lane (x2) PCIe 5.0 drive, negotiating automatically based on the motherboard it is installed in. Both modes deliver the same theoretical bandwidth, so the drive performs consistently whether used in an older PCIe 4.0 system or a newer PCIe 5.0 one. This group covers listings spanning the 1TB and 2TB capacity points, which share the same interface and controller.
The drive is DRAM-less: instead of an onboard DRAM cache chip, it uses Host Memory Buffer (HMB) technology to borrow a portion of system memory, combined with Samsung's TurboWrite SLC-caching technique to sustain performance. It uses 133-layer TLC NAND with a Samsung in-house controller in the standard M.2 2280 form factor.
Rated sequential speeds reach up to 5,000MB/s read and 4,200MB/s write, with random read/write performance up to 700K/800K IOPS. It carries a 5-year warranty rated to 600TBW per 1TB of capacity.
Key features
- Hybrid interface: PCIe 4.0 x4 or PCIe 5.0 x2, auto-negotiated by motherboard
- Sequential read/write up to 5,000/4,200 MB/s
- DRAM-less design using Host Memory Buffer (HMB) instead of a cache chip
- 133-layer TLC NAND with Samsung in-house controller
- 5-year warranty / 600TBW per 1TB of capacity
Full specifications
Interface
- PCIe Interface
- PCIe 4.0 x4 or PCIe 5.0 x2 (hybrid, auto-negotiated)
- Form Factor
- M.2 2280
Performance
- Sequential Read
- Up to 5,000 MB/s
- Sequential Write
- Up to 4,200 MB/s
- Random Read/Write IOPS
- Up to 700K / 800K
Memory & Endurance
- DRAM Cache
- None (DRAM-less, HMB)
- NAND
- 133-layer TLC
- Warranty
- 5 years / 600TBW per 1TB
- Capacities
- 1TB, 2TB
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