Page 1:The Hub Hubbub: Intelligent Vs. Conventional USB 2.0 Hubs
Page 2:Universal Serial Bus: ABC
Page 3:Single TT Or Multi TT
Page 4:Standard Hub With One TT: DLink DUB-H4
Page 5:In The Other Corner, The Multi-TT: LinXcel USB 2.0 Hub
Page 6:Test Configuration
Page 7:Test Results
Page 8:USB 1.1 Performance
Page 9:Conclusion: Multi-TT Worthwhile For High Loads
|Processor||Intel Pentium 4, 2.0 GHz
256 kB L2-Cache (Willamette)
|Motherboard||Intel D845EBT, Intel 845E chipset|
|RAM||256 MB DDR/PC2100, CL2, Infineon|
|Controller||i845E UltraDMA/100 controller (ICH4)|
|Display Adapter||NVIDIA GeForce2 MX 400|
|Network Card||3COM 905TX PCI 100 MBit|
|Operating System||Windows XP Pro 5.10.2600
Service Pack 1
|Benchmarks and Tests|
|Performance Measurements||HD Tach 2.61, c't h2benchw|
|Drivers and Settings|
|Graphics Driver||NVIDIA reference driver 29.42|
|Drivers||Intel Application Accelerator 2.3|
|Resolution||1024x768, 16 bit, 85 Hz refresh|
As always, our benchmark programs are either self-explanatory or easy to understand. However, we would like to briefly discuss this particular testing procedure:
We ran both USB hubs in four different configurations and with two different devices designed primarily with home and business users in mind. One of them was an external USB 2.0 hard drive from ValuePlus called SPIO. The other was a standard Memory Stick from Hana Micron (USB 1.1).
We ran the hubs in the following four configurations:
- Simple benchmark without any peripheral devices. No other USB devices were connected to the hub.
- Test with one device (e.g., SPIO), while data is written to the second device (e.g., Memory Stick).
- Test with one device while a USB 1.1 webcam is active.
- Test with one device while the webcam is active and data is written to the second device.
The different configurations create different load states that could very well occur during normal use and that the USB hubs would have to cope with.