Is 870 QVO better than 870 EVO?
870 EVO even though it has nand3 instead of nand4 is more reliable SSD. They are still working/strugling with new chipset. Also TBW is better on EVO.
| model | 870 QVO | 870 EVO | 860 EVO |
| Capacity | 1TB, 2TB, 4TB, 8TB | 250GB, 1TB, 2TB, 4TB | 250GB, 1TB, 2TB, 4TB |
| Storage Memory | Samsung V-NAND 4-bit MLC (QLC) | Samsung V-NAND 3-bit MLC (TLC) | Samsung V-NAND 3-bit MLC (TLC) |
| Controller | Samsung MKX Controller | Samsung MJX Controller | Samsung MJX Controller |
| DRAM (Cache) | LPDDR4: 1GB (1GB) 2GB (2TB) 4GB (4TB) 8GB (8TB) |
LPDDR4: 512MB (250GB/500GB) 1GB (1TB) 2GB (2TB) 4GB (4TB) |
LPDDR4: 512MB (250GB/500GB) 1GB (1TB) 2GB (2TB) 4GB (4TB) |
| Sequential Read | Up to 560 MB/s | Up to 560 MB/s | 550 MB/s |
| Sequential Write | Up to 530 MB/s | Up to 530 MB/s | 520 MB/s |
| 4KB Random Read | Up to 98K IOPS | Up to 98K IOPS | Up to 10,000 IOPS |
| 4KB Random Write | Up to 88K IOPS | Up to 88K IOPS | Up to 42,000 IOPS |
| TurboWrite Cache | 42GB (1TB) 78GB (2TB, 4TB, 8TB) |
Undisclosed amount of SLC NAND Flash |
Undisclosed amount of SLC NAND Flash |
| Endurance (Total Bytes Written) |
360TBW (1TB) 720TBW (2TB) 1,440TBW (4TB) 2,880TBW (8TB) |
150TBW (250GB) 300TBW (500GB) 600TBW (1TB) 1,200TBW (2TB) 2,400TBW (4TB) |
150TBW (250GB) 300TBW (500GB) 600TBW (1TB) 1,200TBW (2TB) 2,400TBW (4TB) |
| Warranty | 3-year | 5-year | 5-year |
| Where to Buy a Product | |||
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