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| 1 | +--- |
| 2 | +title: Tips & Tricks |
| 3 | +prev: intro |
| 4 | +next: modules/_index |
| 5 | +--- |
| 6 | + |
| 7 | +This page contains semi-random tips and tricks that came up while using Syntalos and that other |
| 8 | +experimenters may run into, but that do not necessarily warrant their own page. |
| 9 | + |
| 10 | +### USB hardware fails / is slow if I plug in many USB devices |
| 11 | + |
| 12 | +This is a very common issue especially if you are using many USB cameras simultaneously. |
| 13 | +For cameras specifically, you can try switching to a different mode of connection, |
| 14 | +for example using them via ethernet if the camera support GigE. |
| 15 | + |
| 16 | +If you *need* to use USB, the cause of the issues is usually that multiple USB ports share the same USB |
| 17 | +controller on commodity hardware. This means that despite multiple USB ports being available, |
| 18 | +the potential maximum bandwidth (and sometimes even power) is split between them. |
| 19 | +Syntalos can visualize which USB controllers your devices are connected to, so you can |
| 20 | +redistribute them to ports where controllers are not shared. Click on *Diagnostics → USB Devices* |
| 21 | +to get a list (and even more detailed information if USBView is installed). |
| 22 | + |
| 23 | +If this does not help, and your problem is power, a powered USB hub can help in some rare |
| 24 | +cases. If that is not the problem or does not help, adding a USB expansion card always solved |
| 25 | +the issue so far. |
| 26 | +Ideally, buy a card which has dedicated controllers for each USB port - those are a lot more |
| 27 | +expensive than regular USB expansion cards, but are worth the money for scientific applications. |
| 28 | + |
| 29 | +We had very good experience with the [StarTech.com 4-Port USB PCIe Card with 4X Independent USB Controllers](https://www.amazon.com/dp/B0DCKC11JM) |
| 30 | +card (link points to its Amazon page). |
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