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SP UD85 PCIe Gen4 x4 NVMe™ SSD

• PCIe Gen4 x4 interface with read speeds up to 3600MB/s and write speeds up to 2800MB/s
• Supports NVMe 1.4 and Host Memory Buffer (HMB) for higher performance and lower latency
• 3D NAND technology allows for dense storage in a compact design
• Available in a range of large storage capacity options: 250GB, 500GB, 1TB, 2TB and 4TB
• Supports low density parity check (LDPC) coding to ensure accuracy of data transmission and reliability of data access
• Supports SLC Caching to improve sequential read/write and random read/write performance
• Supports RAID to protect data in the case of a drive failure
• Built-in E2E data protection for enhanced data transfer integrity
• Small form factor M.2 2280 (80mm) allows for easy installation in laptops, small form factor PC systems, and some ultrabooks

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Upgrade Your Productivity

Looking to make the switch to the latest generation of PCIe interface? The UD85 is the perfect introduction to the power of PCIe 4.0. With support for NVMe 1.4 and Host Memory Buffer (HMB) technology, you'll get uninterrupted productivity via higher performance and lower latency for seamless execution across applications.

Upgrade Your Productivity

Do More With 4TB For Less

The UD85 is all about value: it's available in large storage capacities up to 4TB with an affordable price tag. Get all the space you need for applications, documents, photos, and videos without breaking the bank.

Speed Up Your Efficiency

The UD85 delivers a fast and smooth experience with read speeds up to 3600MB/s and write speeds up to 2800MB/s. It achieves improved sequential read/write and random read/write performance with support for SLC Caching.

A Flexible Upgrade

The UD85 makes it easy to upgrade from PCIe Gen3 to Gen4. It's also backwards-compatible with Gen3 for greater flexibility across systems. And, its M.2 2280 size easily integrates into designs with M.2 connectors, making it the perfect choice for thin laptops and small form factor PCs

A Flexible Upgrade

Lower Latency With 3D NAND

With 3D NAND flash technology, the UD85 incorporates multiple layers of vertically-stacked memory cells to overcome the density limitations of its single-layered 2D counterpart and achieve greater capacities. A reduced distance between memory cells also results in lower latency and higher performance.

Comprehensive Data Protection And Accuracy

The UD85 supports low density parity check (LDPC) coding to ensure accuracy of data transmission and reliability of data access, while RAID protects data in the case of a drive failure. It's also equipped with built-in E2E data protection and an automatic error correction code (ECC) function for enhanced data transfer integrity.

Stay S.M.A.R.T. With SP Toolbox

The SP Toolbox provides a free, user-friendly way to obtain disk information, change settings at any time, and erase files securely. View drive information, S.M.A.R.T. status, wear-out count, and block information with ease. Or, perform a diagnostic scan or performance test to make sure the drive is healthy and running efficiently.

P/N	Capacity	Performance Read	Performance Write	⇅ Compare
SP250GBP44UD8505	250GB	3300MB/s	1300MB/s	Add to compare
SP500GBP44UD8505	500GB	3600MB/s	2400MB/s	Add to compare
SP01KGBP44UD8505	1TB	3600MB/s	2800MB/s	Add to compare
SP02KGBP44UD8505	2TB	3600MB/s	2800MB/s	Add to compare
SP04KGBP44UD8505	4TB	3600MB/s	2800MB/s	Add to compare

Capacity	250GB, 500GB, 1TB, 2TB, 4TB
Dimensions	22.0mm x 80.0mm x 3.5mm
Interface	PCIe Gen4 x4
Weight	8g
Performance Read(max.)	250GB: 3300MB/s 500GB: 3600MB/s 1TB: 3600MB/s 2TB: 3600MB/s 4TB: 3600MB/s
Performance Write(max.)	250GB: 1300MB/s 500GB: 2400MB/s 1TB: 2800MB/s 2TB: 2800MB/s 4TB: 2800MB/s
System Requirement	Computer with M.2 slots supporting PCIe interface and an OS with NVMe support
MTBF (est)	1,500,000 hours
Shock Resistance Test	1500g/0.5ms
Operating Temperature	0℃- 70℃
Certification	CE / FCC / UKCA / BSMI / Green dot / WEEE / RoHS / KCC
Warranty	5-year limited warranty The SSD warranty is based on the TBW or Warranty period. Please click for more information about Silicon Power Warranty Policy.
Note	*Performance read/write varies by system performance (such as hardware, software, and interface mode) and capacity

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SP UD85 PCIe Gen4 x4 NVMe™ SSD

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v2.0

2026/7