With me on problematic route nearly 20% throughput increase over dLAN 650+

Since the times of the (still blue) 85 Mbit / s adapter I use Powerline devolo. About dLAN 200, 500, 650+ to 1200+ now I still be able to achieve a more or less great improvement in data throughput.

The focus is always on my "problem route", which unfortunately makes my central connection between the router on the ground floor and my "infrastructure" (computer, NAS) on the 1st floor. The biggest leap, namely nearly a doubling of throughput I can achieve there + adapter with the change of dLAN 500 to 650. With the 650 + adapters smooth playback of full HD streams via this route (ie the NAS on the 1st floor to the connected directly to the router on the ground floor via Gigabit Ethernet cable TV) was possible with me the first time. Only at very high bit rates (> 35 Mbit / s) it jerky, but what is just the fact that the route is constantly burdened by some webcams, send their content to the NAS (although the video data go in the other direction, but obviously makes the protocol overhead between the NAS and the cameras also significant traffic in the opposite direction); I switch the monitoring app on the NAS from temporarily, the streaming is smooth even at very high bit rates.

As the 1200+ adapter were to get now in flash range for a reasonable price, I slammed. My expectation was by no means a further doubling of the throughput problem on my route, but the hope was that they at least bring as much bandwidth gain that I can save the temporary disabling of the monitoring app me in the future. And yes, this hope has been fulfilled!
Cockpit according to the data rate of previously rose up to 220 Mbit / s (650+ 650+ on) at up to 260 Mbit / s (1200+ 1200+ on). This is around 18% and profit is added, not much, but it is the reserve that was missing me. FullHD streaming now runs absolutely smoothly, without that I would have to turn off my monitor app, even if the bit rate of the material exceeds 35 Mbit / s.
Being quite aware that not play the cockpit data by far the real usable bandwidth, but far too "optimistic" are. In my experience (earlier empirical measurements, sa my review of the 650 + adapters), the actual usable net bandwidth is only one-third of the displayed values. That would be with me now about 85 Mbit / s (compared to about 70 Mbit / s with the 650 + adapters). Nevertheless suck the cockpit values ​​to at least be able to determine the percentage increase.

But is also worth mentioning that has happened in the opposite direction on the route problem absolutely nothing. Both with 650ern and 1200ern I achieve here around 180 Mbit / s (according to cockpit). The throughput of the 1200ern to my still in use dLAN 500 adapters is even lower than before (650 to 500): Around 20-30% loss of bandwidth I have to say here! That's me, of course matter, as only non-critical music streaming clients and Internet radios hang on the 500s, the prima cope even with significantly less bandwidth than previously yet. Probably the decline by targeted exchange of the 500 by the would (now free) 650s mitigate (or even offset), because, as I noted in a brief test, the transfer of 1200ern on 650s is at least as efficient as at 650ern among themselves. But as I said, to me is the throughput on these lines is not important, so I have not followed this approach.

After all the connections with me (both the 1200s with one another and to the 500s) are very stable. The values ​​in the cockpit fluctuate only slightly (+/- 10 Mbit / s), and I could despite intensive use throughout the weekend no disconnections notice (neither short nor long). For me, all the adapters are always running the latest firmware.

Conclusion: The exchange of 650 + - by 1200+ adapter may be worth, but need not. Miracle (as a by product name suggested scarce doubling the bandwidth) we must not expect either way. Under certain circumstances, the upgrade goes even "backfired", especially when still 200 or 500 are in use. Overall, the performance depends on the media "power cord" by so many factors that you can never make a general statement. The only solution is to try; if it does not work, simply re-bagging and return what Amazon is indeed especially no problem at all.