user11794: Would 10 Port Mini USB HUB High Speed 2.0 with Power Adapter Black #198 UK (on eBay) be suitable for Bitcoin mining?
I have a new PC, so I don't want to damage the motherboard by using the USB ports constantly.
If this isn't suitable, why and what should I be looking for?

user9316: Been running 3 ASIC miners on a USB hub (similar to the reference above) 24/7 and for a few months now.  No appreciable change on equipment.  Also, buy a USB fan to cool the equipment.  This is the fan I'm using and its working fine.  USB fan
Good Luck!

user10577: There is no connection between using a USB port, powered or not, and your miner getting hot. Your miner gets hot because it is doing work, see below. 
USB powered hubs have the capability to supply a limited amount of power if the device needs it. Devices that have their own power source rarely use power from the hub.
Work requires energy. The way energy works is that all the electricity used by the miner is turned into heat, one way or another. All work also generates heat. Even you.
BTW, what miner are you using?

11794: <p>Would <em><a href="http://www.ebay.co.uk/itm/10-Port-Mini-USB-HUB-High-Speed-2-0-with-Power-Adapter-Black-198-UK-/360566754350?pt=UK_Computing_USB_Cables&amp;hash=item53f3740c2e" rel="nofollow">10 Port Mini USB HUB High Speed 2.0 with Power Adapter Black #198 UK</a></em> (on <a href="http://en.wikipedia.org/wiki/EBay" rel="nofollow">eBay</a>) be suitable for Bitcoin mining?</p>

<p>I have a new PC, so I don't want to damage the motherboard by using the USB ports constantly.</p>

<p>If this isn't suitable, why and what should I be looking for?</p>
 9316: <p>Been running 3 ASIC miners on a USB hub (similar to the reference above) 24/7 and for a few months now.  No appreciable change on equipment.  Also, buy a USB fan to cool the equipment.  This is the fan I'm using and its working fine.  <a href="http://www.ebay.co.uk/itm/Arctic-Cooling-Arctic-Breeze-Portable-Mobile-USB-Fan-/390681051134?pt=LH_DefaultDomain_0&amp;hash=item5af667bffe" rel="nofollow">USB fan</a>
Good Luck!</p>
 10577: <p>There is no connection between using a USB port, powered or not, and your miner getting hot. Your miner gets hot because it is doing work, see below. </p>

<p>USB powered hubs have the capability to supply a limited amount of power if the device needs it. Devices that have their own power source rarely use power from the hub.</p>

<p>Work requires energy. The way energy works is that all the electricity used by the miner is turned into heat, one way or another. All work also generates heat. Even you.</p>

<p>BTW, what miner are you using?</p>
