I don not think the USB3.0 version performs better then the USB2.0 version on a USB2.0 port. The USB2.0 ASI120MM camera do not like any other devices on the same USB host. I have my USB traffic setting at 96% on my telescope computer and every other USB device is connected on a separate PCI USB2.0 card. The ASI120MM camera is alone on the motherboards USB host. If I connect a USB mouse on any other port to the motherboard I have to lower the USB traffic setting, and yes a mouse shouldn't draw any bandwidth at all but I think it has something with resource allocation to do. I am not an expert on these type of things, btw I have reached 100% USB traffic on a P5Q motherboard! But on a laptop, there are many internal USB resources that can't be disconnected. But you can try different USB jacks and if you have a PCI express or PC-card slot, a slot in card could be a solution