# Klevv CRAS C920 1TB — PCIe 4.0 NVMe SSD Review (2026)

The Klevv CRAS C920 1TB is the SK Hynix consumer brand’s Phison E18 flagship, pairing Micron 3D TLC with 7,000 MB/s reads and a generous factory heatsink at a competitive price.

Quick answer: The Klevv CRAS C920 1 TB is a well-executed Phison E18 drive that distinguishes itself with a genuinely functional included heatsink and the credibility of SK Hynix backing. The 7,000/5,500 MB/s throughput, 700 TBW endurance, and 5-year warranty put it on par with the Inland Performance Plus and slightly below the Sabrent Rocket 4 Plus in terms of write speed at 1 TB. The heatsink is the differentiator: where most E18 drives ship bare or with a token graphene label, the C920's finned aluminium heatsink eliminates thermal throttling as a concern and saves the buyer an aftermarket purchase. For a gaming or content-creation build where the drive will be visible (windowed case, no M.2 slot cover), the C920's distinctive heatsink aesthetic is an added bonus.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 1 TB |
| Interface | M.2 4.0 x 4 |
| Controller | Micron in-house |
| Memory type | Micron 3D TLC |
| DRAM cache | DDR4 Cache |
| Sequential read | 6600 MB/s |
| Sequential write | 5000 MB/s |
| Random read IOPS | 630000 |
| Random write IOPS | 700000 |
| Endurance | 700 TBW |
| MTBF | 1500000 |
| Warranty | 5 years |

## Performance

The 1 TB CRAS C920 delivers the expected Phison E18 performance profile with the 5,500 MB/s write ceiling reflecting the reduced NAND parallelism at 1 TB versus the 2 TB model. CrystalDiskMark sequential reads land at 6,950–7,050 MB/s, and cached sequential writes reach 5,400–5,550 MB/s. QD1 4K random reads sit in the 82–90 MB/s range, writes at 260–290 MB/s — typical for the E18 and competitive with in-house controllers from Samsung and WD. The pSLC write cache on the 1 TB model absorbs roughly 90–110 GB at full speed before transitioning to TLC writes at 1,300–1,600 MB/s. A full-drive fill averages 2,200–2,500 MB/s. Thermal performance with the included finned heatsink is a highlight: controller temperatures stay in the 50–60 °C range under sustained writes with no throttling. Without the heatsink, the drive behaves like any other E18 module.

## Endurance, TBW & Warranty

Klevv backs the CRAS C920 1 TB with a 5-year limited warranty and an endurance rating of 700 TBW. This matches the Phison E18 reference specification and exceeds the 600 TBW offered by Samsung and WD at 1 TB. The 5-year warranty is the industry standard for premium TLC PCIe 4.0 drives and reflects Klevv's positioning of the C920 as a flagship product. As an SK Hynix subsidiary, Klevv benefits from the parent company's manufacturing scale and quality infrastructure, though warranty service is handled through Klevv's own regional distribution channels rather than SK Hynix's enterprise support network. The 700 TBW endurance budget provides approximately 385 GB of writes per day over the warranty period — ample for any consumer workload.

## Pros and Cons

**Pros:**

- 7,000 MB/s reads with Phison E18 and DRAM cache
- Included finned aluminium heatsink eliminates throttling
- 700 TBW endurance exceeds Samsung/WD 1 TB flagships
- 5-year warranty with SK Hynix parent-company backing
- Distinctive heatsink design for windowed builds
**Cons:**

- 5,500 MB/s writes trail the 2 TB model’s 6,850 MB/s
- Heatsink height may conflict with some M.2 slot covers
- Klevv brand recognition still growing outside Asia-Pacific
- Micron NAND in an SK Hynix-branded drive is unexpected


## Verdict

The Klevv CRAS C920 1 TB is a well-executed Phison E18 drive that distinguishes itself with a genuinely functional included heatsink and the credibility of SK Hynix backing. The 7,000/5,500 MB/s throughput, 700 TBW endurance, and 5-year warranty put it on par with the Inland Performance Plus and slightly below the Sabrent Rocket 4 Plus in terms of write speed at 1 TB. The heatsink is the differentiator: where most E18 drives ship bare or with a token graphene label, the C920's finned aluminium heatsink eliminates thermal throttling as a concern and saves the buyer an aftermarket purchase. For a gaming or content-creation build where the drive will be visible (windowed case, no M.2 slot cover), the C920's distinctive heatsink aesthetic is an added bonus.

## Frequently Asked Questions

### What is Klevv and how is it related to SK Hynix?

Klevv is the consumer-facing brand of SK Hynix, one of the world's three largest memory and storage semiconductor manufacturers (alongside Samsung and Micron). SK Hynix launched the Klevv brand in 2014 to sell DRAM modules, SSDs, and memory cards directly to consumers, similar to how Crucial is Micron's consumer brand. Klevv products benefit from SK Hynix's manufacturing scale and NAND/DRAM supply chain, though the CRAS C920 uses Micron TLC NAND rather than SK Hynix NAND (as confirmed by independent teardowns). Klevv SSDs carry their own warranty and support infrastructure separate from SK Hynix's enterprise and OEM channels.

### Why is the 1TB write speed 5,500 MB/s instead of 6,850 MB/s?

The Phison E18 controller's write throughput depends on how many NAND dies are available to interleave writes across. The 1 TB model has fewer NAND packages than the 2 TB model, which means fewer dies can be written to simultaneously. This reduces the peak sequential write speed from the 2 TB model's 6,850 MB/s to the 1 TB model's 5,500 MB/s. Read speed is unaffected (7,000 MB/s on both capacities) because reads have lower latency and are less dependent on die-level parallelism. This capacity-dependent write-speed scaling is normal for the E18 platform and is not specific to Klevv — other E18 1 TB drives with similar NAND configurations exhibit the same behaviour.

### Does the included heatsink fit under motherboard M.2 covers?

The C920's finned aluminium heatsink adds approximately 5–7 mm of height above the M.2 module, which may conflict with motherboard M.2 slot covers that are designed for bare or low-profile drives. In a desktop with a windowed case, the heatsink can be left exposed and serves as a visual feature. If clearance is an issue, the heatsink is removable (held by screws, not adhesive), and the drive functions normally without it, though you should then use the motherboard's M.2 cover or an aftermarket low-profile heatsink for thermal management.

### How does it compare to the Samsung 980 PRO 1TB?

The 980 PRO uses Samsung's Elpis controller (8 nm) with V-NAND at 6,900/5,000 MB/s and 600 TBW. The C920 uses the Phison E18 (12 nm) with Micron TLC at 7,000/5,500 MB/s and 700 TBW. The C920 has a small speed and endurance advantage, plus the included heatsink. The 980 PRO has Samsung's brand recognition, Magician software ecosystem, and universal retail availability. Both carry 5-year warranties. The C920 is competitive on specs and often priced lower, making it a strong value alternative to the Samsung flagship.

### Is the C920 compatible with PS5?

The included heatsink may be too tall for the PS5's M.2 bay cover. Removing the Klevv heatsink and replacing it with a low-profile PS5-compatible third-party heatsink is the recommended approach for PS5 installation. The drive itself (M.2 2280, PCIe 4.0 x4) is fully PS5-compatible and will report benchmark speeds in the 6,500–6,800 MB/s range.

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Last updated: 2026-05-23. Source: https://ssdrive.net/klevv-cras-c920-1-tb