Seagate BarraCuda 120 SSD 1TB vs Silicon Power Ace A55 1TB
The site holds no current price for at least one of these, so what follows compares specifications alone.
| Specification | SeagateBarraCuda 120 SSD 1TB | Silicon PowerAce A55 1TB |
|---|---|---|
| Capacity (GB) | 1000 | 1000 |
| Sequential read (MB/s) | 560 | 560 |
| Sequential write (MB/s) | 540better | 530 |
| Current best price | — | — |
| Price per TB | — | — |
| Endurance (TBW) | 600better | 240 |
| Warranty (years) | 5better | 3 |
| NAND type | tlc | tlc |
How these two compare
Sequential throughput
Seagate BarraCuda 120 SSD 1TB is rated 560 MB/s read and 540 MB/s write; Silicon Power Ace A55 1TB, 560 MB/s read and 530 MB/s write. The SATA link tops out around 550 MB/s each way, and both work against that ceiling; the more telling differences between SATA drives are how each holds up under sustained load, whether it carries a DRAM cache, and how much writing it is rated to take.
Endurance
The makers warrant 600 TBW on Seagate BarraCuda 120 SSD 1TB and 240 TBW on Silicon Power Ace A55 1TB — how much writing each is rated to take before the endurance clause lapses. Most desktop workloads never come close, so read the two against each other rather than as a limit you are likely to reach.
NAND and warranty
NAND: Seagate BarraCuda 120 SSD 1TB uses TLC and Silicon Power Ace A55 1TB uses TLC. The tier is bits per cell — SLC, MLC, TLC and QLC from one to four — trading density against endurance and sustained-write speed: QLC is cheapest per gigabyte, TLC the mainstream balance, and the denser the cell the sooner sustained writes taper. On the cover: Seagate BarraCuda 120 SSD 1TB carries a 5-year warranty, Silicon Power Ace A55 1TB carries a 3-year warranty. The length is the maker's own vote of confidence, and on an SSD it tends to track the endurance rating — a longer warranty usually meaning more rated writes.
Which to buy
With a price missing for at least one side, there is no cost verdict to give. What separates two otherwise-similar drives is up in the sections above — sustained and random behaviour, whether there is a DRAM cache, the flash tier and the warranty — so weigh those against what your build needs.
Common questions about this pair
- Which is faster, Seagate BarraCuda 120 SSD 1TB or Silicon Power Ace A55 1TB?
- Seagate BarraCuda 120 SSD 1TB is rated 560 MB/s read and 540 MB/s write; Silicon Power Ace A55 1TB, 560 MB/s read and 530 MB/s write. The SATA link tops out around 550 MB/s each way, and both work against that ceiling; the more telling differences between SATA drives are how each holds up under sustained load, whether it carries a DRAM cache, and how much writing it is rated to take.
- Should you buy Seagate BarraCuda 120 SSD 1TB or Silicon Power Ace A55 1TB?
- With a price missing for at least one side, there is no cost verdict to give. What separates two otherwise-similar drives is up in the sections above — sustained and random behaviour, whether there is a DRAM cache, the flash tier and the warranty — so weigh those against what your build needs.