According to our test, the power consumption was independent of the display content and load during LAN and USB 3.0 use. Our VC940 measurement device recorded consumption between 2.6 and 2.9 Watts most of the time. We observed both low power consumption and moderate temperatures from the Fujitsu USB 3.0 docking station. This is another area where the DisplayLink driver needs improvement. When we manually set the IP address, the transfer rate was very low and was frequently dropped. The devices were unable to negotiate automatic IP addresses. Lastly, direct connection between the desktop computer and the docking station refused to work during our test. However, the N56VM’s integrated network card achieved a significantly faster 111 MB/s transfer rate and the simultaneous playback of video naturally did not have an impact on this transfer speed. As soon as we connected and displayed HD video on an external 2560x1440 display, the data rate dropped to a still reasonable 36.3 MB/s. We observed a transfer speed of 49.6 MB/s from the PR08 with no peripherals connected. We also performed a stress test by running 10 parallel data streams using Iperf and measuring the average transfer rate. The Wi-Fi connection of the N56VM’s Intel Wireless-N 2230 was also faster with a transfer rate of 33 MB/s. By comparison, the onboard Atheros AR8161/8165 LAN interface from our Asus N56VM achieved a transfer speed of 46.8 MB/s. No external displays or USB devices were connected during the test. The docking station achieved a transfer rate of 23.9 MB/s (191.2 Mbit/s) with a Cisco router using one parallel stream and default settings. We used the Iperf testing program and the JPerf graphical front-end for our test. The desktop computer also used an Intel Core i7-2600K processor, Intel P67 motherboard, 8 GB RAM, and Window 7 Ultimate. We tested the Gigabit LAN connection against a desktop computer using the Intel 82579V Gigabit Network Connection network card running on driver version 17.1. Full screen video playback on the external monitor raised the CPU load to a no-longer-modest 11 percent.Īs is typical for a docking station, the LAN and audio interfaces are supported by the docking station via USB. On the other hand, during the playback of standard definition video on the external monitor, CPU usage increased to a non-trivial level. While displaying only the desktop, the DisplayLinkManager application registered virtually no CPU load on the Core i7-2673M ULV processor in our test Acer Aspire Timeline Ultra M3. In our tests, we observed that the CPU load of the driver heavily depends on the contents to be displayed. CPU PerformanceĪs the video output stream from the notebook to the docking station is encoded automatically, the D元900 requires a bit of processor performance. We believe this to be a limitation of the docking station as our test system, the Asus N56VM, uses a powerful quad-core Ivy Bridge processor which has more than sufficient computational power. Playback of “Big Buck Bunny” in 1080p using H.264 compression and YouTube 720p video did not feel entirely smooth. When displaying HD video on the external display, we observed a slight stuttering. However, we did discover a single limitation in 2D operation. According to Mac OS X will be supported at a later date. We tested the device using Windows 7 64-bit.
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