# Apacer Endurance 512 GB: The Entry Capacity of Apacer's NAS Line (2026)

The Apacer Endurance 512 GB is the entry capacity of Apacer's PB4480-R line, a PCIe 4.0 NAS SSD tuned for 24/7 use with 5,000 MB/s reads and a five-year warranty.

Quick answer: The Apacer Endurance 512 GB is best understood as what Apacer built it to be, a PCIe 4.0 M.2 SSD tuned for 24/7 NAS use rather than a peak-throughput enthusiast drive. Its 5,000 MB/s reads, 3D TLC, DRAM-less HMB architecture, and 340,000 IOPS place it in the budget-Gen4 band, while its real value sits in the NAS-focused firmware, the 2 million hour MTBF, and the five-year warranty that distinguishes it from Apacer's three-year consumer AS2280Q4X line. For an all-NVMe NAS build, a fast cache volume, or a small RAID array, the 512 GB is a sensible entry point, and buyers who need more cache or pooled storage should step up to the 1 TB or 2 TB. The drive is not the right choice for buyers chasing 7,000 MB/s-plus flagship Gen4 speeds or the heaviest sustained random-write workloads, where a drive with discrete DRAM like the Anacomda i4-X or Samsung 980 Pro pulls ahead. Within its intended NAS role, the Endurance 512 GB delivers reliability tuning and warranty length at a budget-Gen4 price, which is a fair trade for the throughput it gives up.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 512 GB |
| Interface | M.2 4.0 x 4 |
| Controller | Maxio MAP1602 |
| Memory type | 3D TLC |
| DRAM cache | No |
| Sequential read | 5000 MB/s |
| Sequential write | 4400 MB/s |
| Random read IOPS | 340000 |
| Random write IOPS | 340000 |
| Endurance | 340 TBW |
| MTBF | 2000000 |
| Warranty | 5 years |

## Performance

Apacer rates the Endurance 512 GB at 5,000 MB/s sequential reads and 4,400 MB/s sequential writes over PCIe 4.0 x4, with up to 340,000 random read and 340,000 random write IOPS per the johnnylucky database. Those figures place the drive in the budget-Gen4 performance band rather than the flagship tier, which is consistent with its role as a reliability-tuned NAS drive rather than a peak-throughput enthusiast drive. The Maxio MAP1602-class controller is a proven DRAM-less PCIe 4.0 design that uses Host Memory Buffer for the flash translation layer, the standard architecture for drives in this speed and price range.

For NAS workloads the more relevant metrics are sustained-write consistency and power-loss resilience, and Apacer's positioning of the PB4480-R as a 24/7 NAS SSD suggests firmware tuned for steady mixed writes rather than burst sequential speed. eTeknix's review of the 1 TB model treated the line as a NAS-purpose drive, which is the right frame for evaluating the 512 GB. Random I/O at 340,000 IOPS is modest by flagship standards but adequate for NAS cache duties, where the drive absorbs small random writes from the array and serves them back without the latency spikes a QLC drive would show. As a DRAM-less HMB design, the drive will trail drives with discrete DRAM under heavy sustained random writes, but for the NAS role it is built for the trade-off is acceptable given the price.

## Endurance, TBW & Warranty

Apacer backs the Endurance 512 GB with a five-year limited warranty, terminated at whichever arrives first between the term and the drive's TBW endurance rating, the longer coverage that NAS and workstation buyers expect and a step up from the three-year warranty on Apacer's consumer AS2280Q4X line. The PB4480-R is marketed as a high-endurance NAS drive, and Apacer quotes a 2 million hour MTBF for the family, a fleet-reliability statistic describing expected failure rates across a population of drives rather than a lifespan promise for any individual unit. Apacer does not publish a per-capacity TBW table for the PB4480-R in accessible English-language sources, so the 512 GB's exact endurance rating is not independently verified here; what is verifiable is the five-year term and the NAS-tuned positioning, which together indicate the drive is built for sustained 24/7 operation rather than light consumer use. For a NAS cache drive that absorbs continuous small random writes, the five-year coverage is the more meaningful reliability figure, since it reflects Apacer's confidence in the firmware's sustained-write handling. Buyers running the 512 GB in a pooled-storage or RAID cache role should size the drive so it is not continuously full, since SLC cache and over-provisioning headroom both affect sustained-write endurance in NAS duty.

## Pros and Cons

**Pros:**

- NAS-tuned firmware for 24/7 sustained-write reliability
- Five-year warranty, longer than consumer AS2280Q4X line
- 2 million hour MTBF rating
- 3D TLC NAND, avoids QLC's endurance and SLC-cache pitfalls
- Budget-Gen4 price point for a reliability-focused drive
**Cons:**

- 5,000 MB/s reads trail flagship Gen4 drives by a wide margin
- DRAM-less HMB design limits sustained random I/O
- 512 GB is small for anything beyond NAS cache duty
- Per-capacity TBW not published in accessible sources
- 340K IOPS is modest by current Gen4 standards


## Verdict

The Apacer Endurance 512 GB is best understood as what Apacer built it to be, a PCIe 4.0 M.2 SSD tuned for 24/7 NAS use rather than a peak-throughput enthusiast drive. Its 5,000 MB/s reads, 3D TLC, DRAM-less HMB architecture, and 340,000 IOPS place it in the budget-Gen4 band, while its real value sits in the NAS-focused firmware, the 2 million hour MTBF, and the five-year warranty that distinguishes it from Apacer's three-year consumer AS2280Q4X line. For an all-NVMe NAS build, a fast cache volume, or a small RAID array, the 512 GB is a sensible entry point, and buyers who need more cache or pooled storage should step up to the 1 TB or 2 TB. The drive is not the right choice for buyers chasing 7,000 MB/s-plus flagship Gen4 speeds or the heaviest sustained random-write workloads, where a drive with discrete DRAM like the Anacomda i4-X or Samsung 980 Pro pulls ahead. Within its intended NAS role, the Endurance 512 GB delivers reliability tuning and warranty length at a budget-Gen4 price, which is a fair trade for the throughput it gives up.

## Frequently Asked Questions

### Is the Apacer Endurance 512 GB good for a NAS?

Yes, that is exactly what it is built for. The Endurance line is Apacer's PB4480-R, an M.2 PCIe Gen4 SSD the company positions as a high-endurance drive tuned specifically for NAS storage and 24/7 sustained-write duty. eTeknix's review of the 1 TB model described the line as designed specifically for NAS systems. The 512 GB suits a NAS cache role or a small array rather than primary bulk storage, where the larger capacities make more sense. The five-year warranty and 2 million hour MTBF are the NAS-relevant reliability figures, and the 3D TLC NAND avoids the endurance and SLC-cache pitfalls of QLC drives in sustained-write duty.

### How fast is the Apacer Endurance 512 GB?

The drive is rated at 5,000 MB/s sequential reads and 4,400 MB/s sequential writes over PCIe 4.0 x4, with up to 340,000 random read and write IOPS per the johnnylucky database. Those figures place it in the budget-Gen4 performance band, behind the 7,000 MB/s-plus flagship Gen4 drives, which is consistent with its role as a reliability-tuned NAS drive rather than a peak-throughput enthusiast drive. For a NAS cache volume absorbing small random writes, the sustained-write consistency matters more than the burst sequential ceiling, and the 3D TLC NAND handles that duty better than a QLC alternative. It is not the drive for buyers chasing benchmark records.

### What is the warranty on the Apacer Endurance 512 GB?

Apacer covers the Endurance line with a five-year limited warranty, terminated at whichever arrives first between the term and the drive's TBW endurance rating, which is longer than the three-year warranty on Apacer's consumer AS2280Q4X line and appropriate for a drive pitched at 24/7 NAS duty. Apacer also quotes a 2 million hour MTBF for the PB4480-R family, a fleet-reliability statistic describing expected failure rates across a population of drives rather than a lifespan promise for any individual unit. The five-year term is the more practical reliability figure for a NAS cache drive, since it reflects confidence in the firmware's sustained-write handling. Apacer does not publish a per-capacity TBW table for the PB4480-R in accessible sources.

### Is the Apacer Endurance 512 GB a TLC or QLC drive?

It is a 3D TLC drive, which is the better NAND type for the NAS sustained-write role the Endurance line is built for. TLC stores three bits per cell and offers higher write endurance and more consistent SLC-cache behaviour than QLC, which stores four bits per cell and degrades faster under sustained writes. For a NAS cache drive that absorbs continuous small random writes, TLC's endurance advantage is meaningful, and it avoids the scenario where a QLC drive's SLC cache exhausts and write speed collapses during a large backup or sync. The 3D TLC NAND is one of the reasons the Endurance line carries a five-year warranty where cheaper QLC drives typically carry three.

### Should I buy the Apacer Endurance 512 GB or a larger capacity?

The 512 GB suits a NAS cache role or a small array, where it absorbs small random writes and serves them back without needing large bulk capacity. For primary pooled storage or a larger cache volume, the 1 TB or 2 TB makes more sense and carries a larger SLC cache and more over-provisioning headroom, both of which help sustained-write endurance in NAS duty. All four PB4480-R capacities, 512 GB, 1 TB, 2 TB, and 4 TB, share the same controller, 3D TLC, and five-year warranty, so the choice is about capacity and budget rather than performance. Buyers running the drive as a desktop boot SSD rather than in a NAS may find a faster flagship Gen4 drive a better fit for the price.

### Does the Apacer Endurance 512 GB have a DRAM cache?

No, the Endurance uses a DRAM-less HMB design, borrowing a slice of system memory for the flash translation layer rather than carrying a discrete DRAM chip. That is the standard architecture for a drive in this speed and price band, and it keeps cost and power draw down, both relevant for a NAS where multiple drives may run together. The trade-off is that sustained heavy random writes run with higher latency than on a drive with discrete DRAM, though for the NAS cache role the Endurance is built for the firmware tuning and TLC NAND matter more than peak random I/O. Buyers who need discrete-DRAM consistency under the heaviest writes should look at a flagship Gen4 drive instead.

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Last updated: 2026-07-24. Source: https://ssdrive.net/apacer-endurance-512-gb