News

December 01, 2011

Connection speed vs. throughput speed

One question we get via email quite often asks how come two different model Wi-Fi adapters with the same connection speed to the router (example: 150 mbps) have different Internet download speeds? It would seem if they both get a 150 mbps connection to the same router, and both have a 100% signal, that the data transfer rates should be identical.

This will not always be the case. Though they may be comparable, it is possible for one of the adapters to download or stream video faster with one particular router, but be slower with another. This type of speed is called 'througput speed' and this is the actual data transfer rate the adapter is getting to the Internet. Different Wi-Fi radios have different technology even though they may be the same standard (such as 802.11n). Therefore, while the connection speed to the router could be 150 mbps with both adapters, one may have a 25 mbps throughput speed to your ISP while the other may have 18 mbps. Transfers between the adapters and the router (such as a computer to computer file transfer) should be about the same with either device. But downloads from the Internet may be slower with one vs. the other.

So if both model Wi-Fi adapters you have get similar range, but model A gets faster throughput to your router than model B, does that mean you should toss model B? Not necessarily. Model A may be faster when connecting to your model router, but it could be slower when connecting to a different model router. An interesting experiment for those who have access to multiple adapters and routers is to do a througput speed test with each adapter to each of the different model routers and compare the rates. In some cases there may be a clear winner, while in other cases you may get a split decision.


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September 29, 2011

Now available- Alfa AWUS036NHA high speed Wi-Fi receiver w/ Atheros Align® technology

Now in stock at Rokland- the Alfa AWUS036NHA, a high speed Wi-Fi USB adapter featuring the Atheros AR9271 chipset with Atheros Align® technology. AWUS036NHA offers better true throughput to your ISP compared to other Wi-Fi USB adapters. It is perfect for video streaming, large downloads, and online gaming.


More from the manufacturer:

"Atheros Align® technology leverages the 802.11n 1–stream specification to provide the optimal upgrade path from legacy 802.11 solutions. The single-stream feature enables a new class of Wi-Fi devices that deliver performance enhancements over the existing 802.11g technology, at comparable price points. Align® solutions are forward compatible to higher-performance, multi-stream, MIMO–based 802.11n, and are available in reference designs to serve the networking, PC and consumer electronics markets. The enhanced throughput of Align 1–stream solutions improves network efficiency by occupying the wireless channel for shorter periods than slower 11g devices – reducing congestion and increasing capacity for additional wireless devices."

Alfa AWUS036NHA is now in stock and available for immediate shipment. It comes with a 5 dBi gain external antenna, USB cable, and driver CD. It is compatible with Windows XP, Vista, and Windows 7.

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