Seagate BarraCuda 120 SSD 1TB vs Silicon Power Ace A55 1TB
On the measures that settle this, Seagate BarraCuda 120 SSD 1TB never comes out behind, and on at least one it comes out ahead.
| 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 | $74.99betterat Amazon.com · captured 2026-09-13 | $132.97at Amazon.com · captured 2026-09-13 |
| Price per TB | $74.99better | $132.97 |
| 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.
Price
Seagate BarraCuda 120 SSD 1TB lists at $74.99, or $74.99 per TB; Silicon Power Ace A55 1TB at $132.97, or $132.97 per TB.
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
Seagate BarraCuda 120 SSD 1TB. It gives up nothing to the other on the measures the site tracks and leads on at least one, so there is no trade to weigh — the sections above show where the margin is.
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.
- Which costs less per terabyte, Seagate BarraCuda 120 SSD 1TB or Silicon Power Ace A55 1TB?
- Seagate BarraCuda 120 SSD 1TB lists at $74.99, or $74.99 per TB; Silicon Power Ace A55 1TB at $132.97, or $132.97 per TB.
- Should you buy Seagate BarraCuda 120 SSD 1TB or Silicon Power Ace A55 1TB?
- Seagate BarraCuda 120 SSD 1TB. It gives up nothing to the other on the measures the site tracks and leads on at least one, so there is no trade to weigh — the sections above show where the margin is.