# Digma Top P8 4TB Review — Massive Budget PCIe 4.0 NVMe SSD (2026)

The Digma Top P8 4TB is the largest variant in the Digma PCIe Gen4 flagship SSD lineup, pairing Phison E18 silicon with Kioxia TLC NAND for 7000 MB/s sequential reads.

Quick answer: The Digma Top P8 4TB is the most compelling capacity in the lineup for users who need massive fast storage at a budget price. The Phison E18 controller and Kioxia 3D TLC NAND deliver flagship PCIe 4.0 performance, and the 4 TB capacity provides ample room for large media libraries and game collections. The three-year warranty is shorter than the industry standard, and the endurance rating appears conservative compared to competing 4 TB TLC drives. For buyers in Digma's markets who prioritize capacity and speed over warranty length, the Top P8 4TB is a strong value proposition.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 4 TB |
| Interface | M.2 4.0 x 4 |
| Controller | Phison PS5018-E18 |
| Memory type | Kioxia 3D TLC |
| DRAM cache | DDR4-1600 |
| Sequential read | 7000 MB/s |
| Sequential write | 6400 MB/s |
| Random read IOPS | 1000000 |
| Random write IOPS | 1000000 |
| Endurance | 3000 TBW |
| MTBF | 2000000 |
| Warranty | 3 years |

## Performance

Peak sequential performance of 7,000 MB/s read and 6,400 MB/s write matches the E18 reference design, saturating the PCIe 4.0 x4 bus. The Phison controller's 12 nm architecture and eight-channel NAND interleaving deliver these numbers consistently across all E18-based drives regardless of brand. Random 4K performance benefits from the 4 TB NAND configuration — more dies mean more parallel operations, which typically translates to higher IOPS on larger-capacity models of the same platform.

The 4 TB capacity provides the largest dynamic SLC cache in the Top P8 lineup, allowing sustained writes to maintain 6,400 MB/s for extended periods. This is the capacity where the E18's thermal behavior matters most: prolonged writes generate significant heat, and without adequate cooling the controller will throttle to protect itself. A motherboard M.2 heatsink is essentially mandatory at this capacity for any workload that pushes sustained writes. Direct TLC write speeds after SLC cache exhaustion typically land in the 800–1,200 MB/s range on this platform.

## Endurance, TBW & Warranty

Digma covers the Top P8 4TB with a three-year warranty, shorter than the five-year standard from Samsung, WD, and Corsair on their enthusiast drives. The listed endurance is 3,000 TBW — notably the same figure shown for the 2 TB model, which is unusual since most manufacturers scale TBW with capacity. A 4 TB TLC drive from a Western brand typically carries 5,000–6,000 TBW, roughly double the 2 TB rating. Without access to Digma's official endurance documentation or independent long-term testing, the true rating for the 4 TB model remains uncertain. For typical consumer use of 20–40 GB per day, even a conservative estimate would exceed the warranty period by a wide margin. MTBF is not published.

## Pros and Cons

**Pros:**

- 4 TB of fast PCIe 4.0 storage at budget pricing
- Phison E18 controller with 7,000 MB/s reads
- Kioxia 3D TLC NAND with DDR4 DRAM cache
- Largest SLC cache window in the Top P8 lineup
- M.2 2280 form factor for wide compatibility
**Cons:**

- Three-year warranty versus five-year industry standard
- Endurance rating appears low for 4 TB TLC capacity
- E18 thermal output demands adequate heatsink
- Limited availability outside CIS markets


## Verdict

The Digma Top P8 4TB is the most compelling capacity in the lineup for users who need massive fast storage at a budget price. The Phison E18 controller and Kioxia 3D TLC NAND deliver flagship PCIe 4.0 performance, and the 4 TB capacity provides ample room for large media libraries and game collections. The three-year warranty is shorter than the industry standard, and the endurance rating appears conservative compared to competing 4 TB TLC drives. For buyers in Digma's markets who prioritize capacity and speed over warranty length, the Top P8 4TB is a strong value proposition.

## Frequently Asked Questions

### Is the Digma Top P8 4TB a good drive for video editing?

Yes. The 4 TB capacity provides ample space for 4K and 8K video projects, and the Phison E18 controller delivers 7,000 MB/s sequential reads for fast timeline scrubbing. The large SLC cache on the 4 TB model maintains high write speeds during project saves and exports.

### What controller does the 4TB Top P8 use?

The Phison PS5018-E18, a 12 nm flagship PCIe 4.0 controller with eight NAND channels and hardware LDPC error correction. It is the same controller used in premium drives from Corsair, Seagate, and Gigabyte.

### Does the Digma Top P8 4TB have DRAM?

Yes, it includes a DDR4-1600 DRAM cache buffer that maintains consistent random read/write performance and efficient flash translation layer management across the full 4 TB address space, even as the drive approaches capacity.

### What is the endurance rating of the 4TB model?

Digma lists 3,000 TBW for the 4 TB model, which is the same as the 2 TB variant. This is unusual — most manufacturers scale TBW with capacity. The true endurance may be higher, but without official documentation or independent testing, the listed figure should be used for planning purposes.

### How does the Top P8 4TB compare to the WD Black SN850X 4TB?

Both use PCIe 4.0 x4 with TLC NAND and DRAM cache. The SN850X uses WD in-house silicon while the Top P8 uses the Phison E18 reference platform. Peak speeds are comparable. The SN850X offers a five-year warranty and proprietary dashboard software.

### Does the Top P8 4TB need a heatsink?

Yes. The E18 controller runs warm under sustained loads, and at 4 TB capacity with its larger SLC cache, extended writes generate more heat. A motherboard M.2 heatsink is strongly recommended to prevent thermal throttling.

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Last updated: 2026-05-23. Source: https://ssdrive.net/digma-top-p8-4-tb