QNAP (http://www.qnap.com) has refreshed its mid-range NAS business lineup with new two and four-drive desktop models, the TS-239 Pro II+ and TS-439 Pro II+.

The Turbo NAS servers adopt Intel’s new D425 single-core Atom CPU with 1.8GHz clock speed and 1GB of RAM. They provide maximum storage of 8TB (using four 2TB hard drives and single disk volume/JBOD configuration). The TS-239 Pro II+ and TS-439 Pro II+ NAS servers are compatible with VMware, Citrix and Windows 2008 Hyper-V clusters virtualization platform.

They’re designed for file sharing, backup, and advanced server applications in the office environment. They’ll be available later this month. Pricing hasn’t been announced.