Dell SK Hynix 2.5" 6.4TB Gen 4 MU NVMe SSD Drive - PYMY6 HFS6T4GEJVX171N
Every Bytestock refurbished product completes a rigorous refurbishment process that includes full testing. Our refurbished hardware offers extensive savings, typically anywhere from 30%-70% off the MSRP.
| Manufacturer | DELL |
|---|---|
| HDD Brand | Hynix |
| HDD Form Factor | 2.5 inch HDD FF |
| HDD Capacity | 6.4TB |
Technical Specifications
The Dell SK Hynix 6.4TB Gen 4 Mixed-Use NVMe SSD (PYMY6 / HFS6T4GEJVX171N) delivers high-capacity storage in a 2.5″ U.2-compatible form factor. With a PCIe Gen 4 ×4 interface, this drive hits much faster speeds than SATA drives while keeping latency low. Mixed-Use TLC flash gives a blend of good write endurance and strong read performance, making it suitable for workloads that involve both reading and writing but not extreme write intensity. It offers a strong capacity per slot, helping to maximise density without sacrificing reliability.
Use Cases and Applications
This SSD is ideal when storage systems need to balance demand for both performance and capacity. It works well serving virtual machine storage pools where multiple VMs read and write data concurrently, handling database logs and indices, or powering caching layers that improve responsiveness for hot data. In hybrid storage architectures, this drive can act as the performance tier in front of larger HDD volumes, accelerating access to frequently used files and reducing load on slower storage. For data-intensive applications like analytics, AI training pipelines (for read-heavy stages), content delivery networks, or high-resolution media editing, its combination of Gen 4 speed and mixed-use endurance offers real value.
Bytestock Reliability and Support
Refurbished by Bytestock, each unit undergoes rigorous testing to ensure it meets enterprise performance standards. The drive is covered by a 1-year return-to-base warranty, which adds confidence when integrating into existing infrastructures. With fast UK dispatch, reliable international shipping and careful packaging, upgrading with this SSD means gaining large capacity and performance without the usual risks.
Delivery Information
- We Ship Worldwide
Shipping quotes are calculated at checkout using our discounted rates with DHL, based on weight and location.
- Parts Orders
Despatched same day with DHL, providing your order and payment are both received before 4pm, Monday to Friday (except bank holidays).
- System Orders
If ordered before 4pm we endeavour to ship your configured system that same day. However, if your order is particularly large or complex, we’ll take a bit more time to ensure you receive the best possible product.
- DHL UK Express
Next business day delivery during the day to the UK mainland if ordered before 4pm.
- DHL UK Express Pre 12pm
Next day delivery by 12:00 noon to UK mainland addresses.
- DHL Express Worldwide
2-3 day delivery during the day to almost all European business centres and 2-4 days for most other worldwide addresses (some shipments to EU addresses may face delays outside of our control due to customs charges).
- Collection / Own Shipping Account
If you wish to collect your order in person or use your own shipping account (UPS, DHL, TNT and FedEx). Please add your shipping instructions to your order at checkout, or speak to our team on LiveChat or +44 (0) 1753 965 777.


Up to 5-Year Warranty


1-Year Warranty


Extended Warranty Option (3 and 5 Years)
For older generation products that come with a 1-year warranty, we offer the option to extend the warranty to 3 or 5 years for an additional charge.