If there are a lot of walls in your home or you don’t live with a lot of surrounding interference from other routers or appliances, then 2.4GHz will suit your needs fine. These two wireless frequencies each have their own benefits and drawbacks, as we’ve detailed in our guide to wireless bands. Lastly, consider the wireless frequency you want to use: 2.4Ghz or 5GHz. RELATED: What's the Difference Between 2.4 and 5 GHz Wi-Fi (and Which Should I Use)? But if you router or your USB ports aren’t fast enough, you don’t need to spring for the AC adapter–wireless N is probably fine. So if you have a 802.11ac router and a fast enough USB 3.0 port on your computer, you’ll probably want an 802.11ac wireless adapter. My own approach to this problem would be to look for a new dongle with a good reputation for throughput to eliminate the dongle as the bottleneck.As we mentioned in the last section, you’ll also want to be sure that your router and your adapter are able to transmit on the same protocols, otherwise you’re just flushing money down the toilet. You can research this online for your OS/dongle combination. It is also possible that changes to the system’s parameters for the TCP/IP stack could make improvements.
Depending on the driver, there may be options to tune the parameters used by the driver to run the dongle. One more place you might be able to improve things is in the driver configuration. If you choose to buy a new dongle, check reviews for good throughput, they are not all created equal. You can check for updates for the soft parts of this, and, of course you can replace the hardware in this case. Similarly, it could be the implementation of the dongle hardware, firmware, or driver. You can check for firmware updates, and that might just help, but of course you can‘t do anything about the hardware. Even though the standard can support the higher rate, the hardware or firmware for the port could be limiting throughput. It could be the implementation of the USB port. The standard for USB 2.0 provides up to 280mbps, far more than you need for this application. To add a different version of mostly the same answer as others have given:
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