TP-Link TL-PA8030 - Odd Throughput issues

[NetGroo]

I have 2 TL-PA8030 TP-Link adapters with the most recent firmware as of 6/23/16.

I have them plugged in on the same circuit, 6 ft from each other (trying to make debug easy).

The utility reports a throughput of 1202Mbps.

When I connect to a lan port, I can't get actual data throughput better than 5Mbps in one direction (download from my device's perspective). The other direction (upload) seems good.

I am at a loss for why the actual download throughput is so poor. I have nothing else plugged into either outlet. For some reason, I just can't communicate one direction very well.

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Prefetching questions:

These are the only 2 powerline devices in the house.
I'm measuring throughput with both iperf and internet speed tools.
It occurs at further away locations as well, I was just trying to eliminate variables.

 

[sfx2000]

What kind of thruput are you actually seeing across the link?

TPLink's PLC reports the PHY data rate, which is not the Network Data Rate... I've got a longer run, and it hops a breaker, so I see around 400Mbps PHY rate, and about 100Mbps network thruput - which is ok, considering the breaker hop and 30 feet direct (probably with the loops in the wiring, it's closer to 50 feet).

 

[NetGroo]

I see about 3-5Mbps one direction, 20Mbps the other direction.

 

[sfx2000]

Check the wiring maybe?

AC Outlet Testers are a handy thing to keep in the toolkit - and not very expensive..

http://www.harborfreight.com/electric-receptacle-tester-32906.html

 

[NetGroo]

I went ahead and returned the TP-link and picked up the Zyxel PLA5456.
So far so good. I'm getting at least the bandwidth of my internet connection (40/20)

 

[NetGroo]

Well that didn't last long. Life of one of the PLA5456 units was 5 hours. All lights on the unit are off. Changing outlets shows no sign of life.
I'm going to try a comtrend and see if the reliability is better.

 

[sfx2000]

check your power - you're having some very odd issues...