NComputing U170 manual Minimum system requirements, Host computer

USB virtual desktop (model U170) user guide

Minimum system requirements

Host computer

For multiuser applications the host computer operating system can be Windows Server 2003 R2 SP2 (Standard or Enterprise Edition, 32-bit), Windows Server 2008 SP2 (Standard or Enterprise, 32-bit. For more information Microsoft licensing please see the Important Notices section at the beginning of this document.

Almost any modern PC may be used to host NComputing vSpace software. The guidelines below are a good rule of thumb for determining how many users you can expect to have a native experience running general productivity software applications.

Note: The U170 requires USB 2.0 controller(s) for operation. In addition, some older PCs may have difficulty booting with U170 devices (or other high-speed USB audio devices) when attached. In these cases, you may need to boot the computer first, then attach the USB cable. This problem can sometimes be resolved by installing a separate USB 2.0 PCI card into the PC.

The table below describes the maximum bandwidth of the USB bus for modern PC motherboards. Some PCs may contain multiple EHCI controllers that can double or triple the available bandwidth. These systems will have better video performance when running more than 4 U170 devices on a PC. To take advantage of multiple controllers, connect any downstream hubs back to the PC directly rather than connecting all U170s downstream of one USB connection. Adding an additional USB controller card to a PC is also an option for large deployments.

Vendor	Chip Set	USB or EHCI controllers	Maximum Bandwidth
AMD	SB710	2	120 MB/s
Broadcom	HT1100	3	180 MB/s
Intel	ICH8	2	120 MB/s
Intel	ICH9	2	120 MB/s
Intel	ICH10	2	120 MB/s
nVIDIA	ION Series	2	120 MB/s

* Note: This is NOT a comprehensive list of chip set that have more than one USB bus.

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