Samsung 870 QVO 1000GB

The Samsung 870 QVO 1000GB is built upon Samsung’s proprietary MKX controller (S4LR059), a proven architecture shared with the higher-end Samsung 870 EVO 1000GB, paired with dedicated LPDDR4 DRAM for address mapping. The drive utilizes Samsung’s V-NAND 4-bit MLC (QLC) flash memory, which increases storage density per cell compared to TLC alternatives but necessitates more complex error correction and wear-leveling algorithms. This configuration maximizes storage density within the SATA form factor and relies heavily on a variable pseudo-SLC cache to mask the native write latency of the QLC NAND. Technical analysis of the 1TB model reveals a heavy reliance on the "Intelligent TurboWrite" SLC caching technology. While the drive saturates the SATA interface during burst operations, sustained heavy transfers exceeding the cache capacity (approx. 42GB for the 1TB model) will see write speeds drop to approximately 80 MB/s. The drive is typically positioned as a specialized storage solution for "Write Once, Read Many" (WORM) archival tasks or game libraries, rather than write-intensive OS boot drive applications.

Key Specifications

• Interface: SATA III (6Gbps)
• Sequential Speeds: 560 MB/s Read / 530 MB/s Write
• Controller: Samsung MKX
• NAND Type: Samsung V-NAND 4-bit MLC (QLC)
• DRAM Cache: Yes (LPDDR4)
• Endurance Rating: 360 TBW (Total Bytes Written)
• Encryption Support: AES 256-bit Encryption (Class 0), TCG/Opal, IEEE1667 (Encrypted Drive)

Hardware Alternatives

• Samsung 870 EVO 1000GB: The direct architectural sibling to the QVO, using the same MKX controller but pairing it with 3-bit MLC (TLC) NAND, offering significantly higher sustained write speeds and double the endurance rating.
• Crucial BX500 1000GB: A competitor in the entry-level SATA space that often matches the QVO in QLC NAND usage; the BX500 is a DRAM-less design relying on the host for mapping, whereas the QVO retains onboard DRAM.
• Western Digital Blue SA510 1000GB: Competes in the same SATA performance tier; recent revisions have moved to a DRAM-less architecture, differentiating the 870 QVO as one of the few remaining QLC SATA drives to maintain a dedicated DRAM cache.