# Lexar NM800 PRO 512GB Review — A Compact PCIe 4.0 NVMe with DRAM (2026)

The Lexar NM800 PRO 512 GB is a rare breed in the budget PCIe 4.0 segment — it pairs an eight-channel Innogrit IG5236 controller with a DRAM cache, a combination most competitors at this capacity have abandoned for cheaper DRAM-less designs.

Quick answer: The Lexar NM800 PRO 512 GB is the right pick for a buyer who wants a DRAM-equipped PCIe 4.0 boot drive in a single-sided form factor and does not need massive sequential write throughput. The 7,450 MB/s read speed keeps it competitive with drives costing more, and the 500 TBW endurance rating outperforms nearly every other DRAM-equipped 500 GB-class Gen4 drive. Gamers, SFF builders, and laptop upgraders get a responsive, cool-running SSD with hardware encryption — a combination that is surprisingly hard to find at 512 GB. Skip it if your workload involves heavy sequential writes — the 3,500 MB/s write ceiling is a real limit, and the 1 TB variant or a DRAM-less WD Black SN770 will serve those use cases better. For similar money, the Samsung 980 Pro 500 GB offers stronger random I/O but less endurance and no single-sided guarantee, while the TeamGroup MP44L undercuts on price but drops the DRAM cache entirely. The NM800 PRO 512 GB is a niche product done right.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 512 GB |
| Interface | M.2 4.0 x 4 |
| Controller | Innogrit IG5236 |
| Memory type | 176-layer 3D TLC |
| DRAM cache | DDR4L DRAM Cache |
| Sequential read | 7450 MB/s |
| Sequential write | 3500 MB/s |
| Random read IOPS | 500000 |
| Random write IOPS | 900000 |
| Endurance | 500 TBW |
| MTBF | 1500000 |
| Warranty | 5 years |

## Performance

The Lexar NM800 PRO 512 GB is rated for 7,450 MB/s sequential reads and 3,500 MB/s sequential writes, with random performance of up to 500,000 IOPS reads and 900,000 IOPS writes. The read number is excellent — it sits within 50 MB/s of the 1 TB variant and fully saturates the PCIe 4.0 x4 interface for read-heavy workloads. The write number is the story: 3,500 MB/s is roughly PCIe 3.0 territory and reflects the 512 GB variant's reduced NAND parallelism. Independent reviewers measured the larger capacities hitting their rated figures consistently, though the 1 TB model occasionally fell slightly short of its 6,300 MB/s write claim in sustained testing.

The IG5236 controller supports a dynamic pSLC cache that on the 512 GB variant absorbs roughly 150 to 200 GB of writes at full speed before exhausting to direct-to-TLC mode, where writes settle at approximately 800 to 1,000 MB/s. This is adequate for everyday consumer workloads — installing a large game, transferring a video project, or cloning a SATA drive — but anyone moving multi-hundred-gigabyte datasets regularly will notice the post-cache drop. Thermally, the NM800 PRO runs cool by Gen4 standards. The IG5236 on 12nm is more efficient than earlier 28nm Gen4 controllers, and reviewers observed peak temperatures in the low 70s Celsius under sustained sequential load without a heatsink. A passive motherboard M.2 cover is sufficient for desktop use; the PS5's internal airflow handles the heatsink-equipped variant without issue. For gaming specifically, the NM800 PRO loads titles within a second of the fastest PCIe 4.0 drives, and the DRAM cache keeps Windows responsive during background write activity.

## Endurance, TBW & Warranty

Lexar covers the NM800 PRO 512 GB with a 5-year limited warranty and rates the drive for 500 TBW of endurance. At 500 TBW, the drive can absorb roughly 273 GB of writes per day for the warranty period — far beyond typical consumer use of 20 to 50 GB per day. At a 30 GB/day pace, the endurance headroom extends beyond 40 years. The TBW rating scales linearly with capacity: 500 TBW for 512 GB, 1,000 TBW for 1 TB, and 2,000 TBW for 2 TB. The MTBF is rated at 1.5 million hours, a standard population statistic for consumer NVMe SSDs. Compared to competitors at this capacity, the NM800 PRO's 500 TBW endurance is above average — the Samsung 980 Pro 500 GB carries 300 TBW, and the WD Black SN770 500 GB is rated for 300 TBW. The NM800 PRO's endurance advantage comes from the TLC NAND's higher write tolerance relative to QLC alternatives, combined with Lexar's conservative over-provisioning. Warranty claims are handled through Lexar's standard RMA process, backed by Longsys's global distribution network.

## Pros and Cons

**Pros:**

- 7,450 MB/s sequential reads near the PCIe 4.0 ceiling
- Dedicated DRAM cache ensures consistent mixed-workload performance
- 500 TBW endurance — higher than Samsung 980 Pro and WD SN770 at this capacity
- Single-sided PCB fits thin laptops and ultrabooks
- AES 256-bit hardware encryption with TCG Pyrite
- PS5 compatible with optional heatsink
- Runs cool for a Gen4 drive — no thermal throttling at desktop loads
**Cons:**

- 512 GB write speed limited to 3,500 MB/s — half the 2 TB variant's throughput
- Random read IOPS (500K) trail the Samsung 980 Pro at this capacity
- NAND wafer source is unmarked Longsys branding — no vendor traceability
- Heatsink sold separately on the bare-drive SKU
- MTBF of 1.5M hours is below the 1.75-2M hours common on premium competitors


## Verdict

The Lexar NM800 PRO 512 GB is the right pick for a buyer who wants a DRAM-equipped PCIe 4.0 boot drive in a single-sided form factor and does not need massive sequential write throughput. The 7,450 MB/s read speed keeps it competitive with drives costing more, and the 500 TBW endurance rating outperforms nearly every other DRAM-equipped 500 GB-class Gen4 drive. Gamers, SFF builders, and laptop upgraders get a responsive, cool-running SSD with hardware encryption — a combination that is surprisingly hard to find at 512 GB. Skip it if your workload involves heavy sequential writes — the 3,500 MB/s write ceiling is a real limit, and the 1 TB variant or a DRAM-less WD Black SN770 will serve those use cases better. For similar money, the Samsung 980 Pro 500 GB offers stronger random I/O but less endurance and no single-sided guarantee, while the TeamGroup MP44L undercuts on price but drops the DRAM cache entirely. The NM800 PRO 512 GB is a niche product done right.

## Frequently Asked Questions

### Is the Lexar NM800 PRO 512GB good for gaming?

Yes, the NM800 PRO 512 GB is excellent for gaming. The 7,450 MB/s read speed loads games within a second of the fastest PCIe 4.0 drives, and the DRAM cache prevents the micro-stutter that DRAM-less SSDs can exhibit when Windows performs background tasks during gameplay. The 500 TBW endurance rating means you can install and uninstall large game libraries without worrying about write exhaustion. The single-sided PCB also fits into gaming laptops that cannot accommodate double-sided M.2 drives.

### Is the Lexar NM800 PRO compatible with the PS5?

Yes, the NM800 PRO meets Sony's PS5 expansion requirements. The rated 7,450 MB/s sequential read speed exceeds Sony's 5,500 MB/s minimum, and the drive is available in a heatsink-equipped SKU that fits within the PS5's expansion bay dimensions. If you purchase the bare-drive version, you will need to add a third-party heatsink that keeps the total assembly within 110 x 25 x 11.25 mm. The PS5's internal airflow is sufficient to keep the NM800 PRO within its operating temperature range during extended gaming sessions.

### Does the Lexar NM800 PRO have a DRAM cache?

Yes, all capacities of the NM800 PRO include a DDR4L DRAM cache — approximately 512 MB for the 512 GB variant, 1 GB for the 1 TB, and 2 GB for the 2 TB. The DRAM buffer stores the flash translation layer mapping table and ensures consistent random read and write performance under mixed workloads, unlike HMB-based DRAM-less designs that borrow system memory over PCIe.

### Why is the 512GB NM800 PRO write speed only 3,500 MB/s?

The 3,500 MB/s sequential write speed on the 512 GB variant is a result of reduced NAND parallelism. The Innogrit IG5236 is an eight-channel controller, and at 512 GB there are fewer NAND packages to stripe writes across compared to the 1 TB and 2 TB variants. This is a universal characteristic of NVMe SSDs — smaller capacities almost always have lower write speeds — but the gap is particularly noticeable on the NM800 PRO because the 2 TB variant reaches 6,500 MB/s. If your workload involves frequent large sequential writes, the 1 TB or 2 TB variant is worth the extra cost.

### How does the Lexar NM800 PRO compare to the Samsung 980 Pro?

The Samsung 980 Pro 500 GB offers stronger random I/O performance — particularly at low queue depths relevant to boot and application launch — and Samsung's Magician software provides a more polished management experience. However, the NM800 PRO counters with higher endurance (500 TBW vs 300 TBW), a single-sided PCB guarantee, cooler operation, and typically a lower street price. For a boot drive, the 980 Pro's random I/O advantage is meaningful; for a secondary game or storage drive, the NM800 PRO's endurance and thermals give it the edge.

### Does the Lexar NM800 PRO need a heatsink?

For desktop use with a motherboard M.2 cover or moderate airflow, the NM800 PRO 512 GB runs cool enough without a dedicated heatsink — reviewers measured peak temperatures in the low 70s Celsius under sustained load, well within the IG5236 controller's thermal envelope. For PS5 installation, a heatsink is required to meet Sony's specifications, and the heatsink-equipped SKU or a compatible third-party cooler is recommended. In a poorly ventilated laptop or ITX case with restricted airflow, a passive heatsink is a sensible precaution.

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Last updated: 2026-05-17. Source: https://ssdrive.net/lexar-nm800-pro-512-gb