Wireless Performance - 5 GHz, Three Stream
We finally reach the last look at the 692GR's performance—5 GHz, three stream using the Intel 6300 client and once again looking at the 40 MHz bandwidth mode data. Figure 13 shows the wireless Performance Table.
Figure 13: Wireless performance table - 5 GHz, 40 MHz mode, 3 stream
None of the products seem to really benefit from three stream operation, with only modest throughput gains shown. But the 692GR again looks like the weakest performer, measuring only 79 Mbps of best case throughput.
Running simultaneous up and downlink tests bumped that up to only 85 Mbps of total throughput.
Figure 14 shows the IxChariot plots for 40 MHz mode downlink in three-stream mode where the oscillating throughput is again evident.You'll see this again in the 20 MHz bandwidth mode downlink plot, but not in any of the uplink or up / down plots.
Figure 14: TRENDNet TEW-692GR IxChariot plot summary - 5 GHz, 40 MHz mode, downlink, 3 stream
Here are links to the other 5 GHz, 3 stream plots for your reference.
- 5 GHz / 20 MHz downlink
- 5 GHz / 20 MHz uplink
- 5 GHz / 20 MHz up and downlink
- 5 GHz / 40 MHz uplink
- 5 GHz / 40 MHz up and downlink
I'm probably sounding like a broken record, but the TEW-692GR hasn't done anything to change my mind about the value (or lack thereof) of three stream N. If you need further convincing, just look at Table 2. It pulls together the best case throughput from my testing for each of the eight test runs performed and shows the throughput improvement gained by switching from two to three stream N.
|Test Description||2 stream||3 stream||% change|
|2.4 GHz - 20 MHz mode||61||82||34|
|2.4 GHz - 40 MHz mode||70||102||46|
|5 GHz - 20 MHz mode||49||65||33|
|5 GHz - 40 MHz mode||70||79||13|
Table 2: Best case throughput (Mbps)
Keep in mind these are best case gains. In many cases, and especially once signal levels drop to medium and lower signal levels, the performance gain is much less, if anything at all.
It's interesting that the best gain happens to be for 2.4 GHz, 40 MHz bandwidth mode, the most bandwidth hogging, least neighbor-friendly mode you can run. And the least gain is for the mode you'd most want to use, i.e. 5 GHz, 40 MHz bandwidth mode.
At any rate, given its poor range performance even in 2.4 GHz and unimpressive 5 GHz performance, I have to say that TRENDnet's TEW-692GR isn't the best choice you could make if you just have to have three-stream N in both bands simultaneously.