Integral Memory UltimaPro X 240GB — High-End PCIe 3.0 NVMe SSD (2026)
The Integral Memory UltimaPro X 240GB is a high-performance PCIe 3.0 NVMe SSD built around the Phison E12 controller and 3D TLC NAND.
Controller & Memory
The Integral Memory UltimaPro X 240GB uses the Phison PS5012-E12 controller paired with 3D TLC NAND and dedicated DRAM cache. The Phison E12 was one of the most capable PCIe 3.0 x4 controllers, delivering near-saturating sequential speeds and strong random I/O performance. Integral Memory is a UK-based storage manufacturer, and the UltimaPro X was their flagship NVMe offering.
The 240GB variant is rated at 3,300 MB/s sequential reads and 3,000 MB/s writes. These are excellent numbers for PCIe 3.0 — the 3,300 MB/s reads use roughly 94 percent of the interface ceiling. The DRAM cache gives the UltimaPro X better random I/O performance than DRAM-less budget drives.
The 240GB capacity is an odd size (common for older-generation drives), making it suitable as a boot drive but limiting for modern game libraries. The UltimaPro X competes against the ADATA SX8200 Pro, Corsair MP510, and Seagate FireCuda 510 in the high-end PCIe 3.0 segment.
Storage Comparisons:
Ultima Pro X Performance & Benchmarks
The Integral Memory UltimaPro X 240GB is rated at up to 3,300 MB/s sequential reads and 3,000 MB/s writes. At 3,300 MB/s, the drive uses roughly 94 percent of the PCIe 3.0 x4 interface ceiling — an excellent showing that places it among the fastest PCIe 3.0 drives available. The 3,000 MB/s write speed is equally impressive for a 240GB capacity, reflecting the Phison E12's efficient eight-channel NAND interface and the benefit of dedicated DRAM cache.
Integral Memory Ultima Pro X 240 GB vs M.2 3.0 x 4 peers
Switch between sequential throughput and random IOPS to see how this drive stacks up against other M.2 3.0 x 4 SSDs in our database. The highlighted bar is the drive on this page — click any other bar to open that drive.
- ADATA SX 8800 Pro 512 GB: 3,500 MB/s read, 2,700 MB/s write
- ADATA SX 8800 Pro 1 TB: 3,500 MB/s read, 2,700 MB/s write
- ADATA XPG Spectrix S40G RGB 256 GB: 3,500 MB/s read, 3,000 MB/s write
- ADATA XPG Spectrix S40G RGB 512 GB: 3,500 MB/s read, 3,000 MB/s write
- Integral Memory Ultima Pro X 240 GB (this drive): 3,300 MB/s read, 3,000 MB/s write
The Phison E12 controller is a well-regarded high-end design that appeared in many flagship PCIe 3.0 drives including the Corsair MP510 and Seagate FireCuda 510. Its quad-core architecture and DRAM cache support deliver strong random I/O performance that matters most for OS responsiveness and game loading. The E12's 28nm process runs warm under sustained loads, so thermal management is worth considering.
The SLC cache on a 240GB drive will be moderate — perhaps 20-40 GB — meaning sustained writes beyond that threshold drop to direct TLC speeds. The Phison E12-based drives typically maintain reasonable performance after cache exhaustion, though they run warmer than competing designs. Independent reviews of the UltimaPro X are limited given Integral Memory's UK-focused distribution.
Integral Memory Ultima Pro X vs Competitors
See how the Ultima Pro X stacks up against other M.2 3.0 x 4 drives in our database:
Compare with rival drives:
Endurance, TBW & Warranty
The Integral Memory UltimaPro X carries a 5-year warranty, matching mainstream competitors like the Samsung 970 EVO and WD Black SN750. The endurance rating (TBW) for the 240GB variant is not published in the DB. Comparable 240GB TLC drives with Phison E12 typically carry 200-300 TBW — the Corsair MP510 240GB carries 350 TBW. At typical consumer write loads of 20-30 GB per day, a 240GB drive with ~200-300 TBW would last roughly 18-41 years before hitting the endurance limit.
Integral Memory Ultima Pro X 240 GB Specifications
| Category | Value |
|---|---|
| Capacity [?] | 240 GB |
| Interface [?] | M.2 3.0 x 4 |
| Controller [?] | Phison PS5012-E12 |
| Memory type [?] | 3D TLC |
| DRAM [?] | 1,024 cache |
| Read speed (MB/s) [?] | 3300 |
| Write speed (MB/s) [?] | 3000 |
| Read IOPS [?] | 500000 |
| Write IOPS [?] | 410000 |
| Endurance (TBW) [?] | 175 |
| MTBF (million hours) [?] | 2 |
| Warranty (years) [?] | 3 |
Verdict: Is the Ultima Pro X Worth It in 2026?
The Integral Memory UltimaPro X 240GB is a high-performance PCIe 3.0 NVMe SSD with the Phison E12 controller and 3D TLC NAND. It delivers near-ceiling speeds backed by a 5-year warranty. The 240GB capacity and limited brand presence outside the UK are the main caveats. For comparable performance with wider availability, consider the Corsair MP510 or ADATA SX8200 Pro.
+ Pros
- Phison E12 controller with DRAM cache
- 3,300 MB/s reads near PCIe 3.0 x4 ceiling
- 3,000 MB/s writes excellent for 240GB
- 3D TLC NAND
- 5-year warranty
- Cons
- 240GB capacity limiting for modern use
- Limited brand presence outside UK
- No published TBW for 240GB variant
- Phison E12 runs warm under sustained loads
- Scarce independent reviews
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