what's the different between the one with the external power adapter and the one without?

With my USB 3 Ports on my Acer TC-780 front panel ports, I can power all four ports with thumb drives. When I tried the same with a Dell U473D Slim Multimedia Keyboard with 2 USB Port I had to use the pawer supply that came with the HB-UMP3 4-port Powered USB hub. I would advise getting the powered hub because you don't know if your USB port will support enough devices without the power supply unit.

How many ports can I have active at one time, without overloading the single port of the computer?

actually, while you can theoretically link 127 devices, there is a limitation to the depth or hiearchy you can link hubs (which is 7). In many systems (particularly windows) you may find that the hub controller in the pc can consumer 2 or 3 of those tiers. While that's likely not an issue for most, I've run into a problem when I link a 7 port hub into a KVM switch -- I get an error message stating that the system can not see some devices (because the actual 7 port hub actually contains 2 usb controllers and the kvm switch contains 2 controllers). Suffice it to say -- this is a rare occurrence -- just don't daisy chain a bunch of 4 port hubs together if you run out of ports -- get a hub with more ports

How long is USB3 cable?

measured mine at about 1 meter. I really like this thing. The two red high-power only ports are oriented 180 degrees from the USB 3.0 ports so you physically can't mix them up either.

Will using a 7 usb 3.0 hub ultimately put next to no strain on my motherboard because power is being generated from the AC adapter?

I 5 Gigabyte Motherboard with powerful Intel processor, 16 Ram has moor paver than standard PC. I don't think the hub would help. However, some software might. I will look this up in the later date.

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SABRENT 4 Port USB 3.0 Hub with Individual LED Lit Power Switches, Includes 5V/2.5A Power Adapter (HB-UMP3)

Product ID: 14216135

Details

Brand
SABRENT
Color
Black
Compatible Devices
Desktops
Hardware Interface
USB 3.0
Special Feature
Individual for

⚡5Gbps blazing USB 3.0 speed

💡LED-lit power switches for instant status

🔌4 individually switchable USB ports

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Sold byAmazon KUWAITDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔌 Power Your Productivity, One Switch at a Time!

COMPACT SLEEK DESIGN - Minimalist black enclosure fits perfectly on any desk, blending style with professional functionality.
PLUG PLAY SIMPLICITY - No drivers needed—just connect and go with hot-swappable convenience for instant productivity.
POWER UP WITHOUT LIMITS - Includes a robust 5V/2.5A power adapter to ensure all your devices stay powered and ready, even high-demand peripherals.
BLAZING FAST DATA TRANSFER - Experience ultra-responsive 5Gbps USB 3.0 speeds that keep your workflow seamless and efficient.
TOTAL CONTROL AT YOUR FINGERTIPS - Individually LED-lit power switches let you manage each port’s power, reducing energy waste and boosting device longevity.

The SABRENT 4 Port USB 3.0 Hub (HB-UMP3) delivers ultra-fast 5Gbps data transfer with four individually switchable USB ports, each featuring LED indicators. Designed for professionals who demand control and efficiency, it includes a powerful 5V/2.5A adapter to support multiple devices simultaneously. Plug & play compatibility with Windows 10 and Mac OS X ensures effortless setup, making it an essential desktop upgrade for seamless connectivity.

Specifications

ASIN	B00TPMEOYM
Additional Features	Individual Power Switches for each USB Port
Best Sellers Rank	#31 in USB Hubs
Brand	SABRENT
Built-In Media	Item
Color	Black
Compatible Devices	Desktops, Laptops
Customer Reviews	4.5 4.5 out of 5 stars (12,378)
Data Transfer Rate	5 Gigabytes Per Second
Enclosure Material	Plastic
Global Trade Identification Number	00819921011749
Hardware Interface	USB 3.0
Item Dimensions L x W x H	3.5"L x 1.5"W x 0.5"H
Item Weight	1.5 Ounces
Manufacturer	SABRENT
Mfr Part Number	HB-UMP3
Minimum Required Operating System Version	Windows 10
Model Number	HB-UMP3
Number of Ports	4
Operating System	Mac OS X and Higher
Total Usb Ports	4
UPC	819921011749
Unit Count	1.0 Count
Warranty Description	1 year limited

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