Ruckus R650 slower on POE than AC

[nick_s]

I've been running my Ruckus R650 for a few months and I've been happy with the reliability but slightly disappointed with the speeds. Even with a direct line of sight to the AP the fastest speeds I could get were 400Mbps.  After some troubleshooting I've discovered that switching from POE to plugging in an AC adapter allows me to hit >900Mbps speeds. I don't understand why that's the case when I wasn't getting any power warnings and I even tried manually setting the AP to 802.3at. Has anyone seen this?  Any ways around the limitation?

[Squozen]

Are you definitely seeing 802.3at from the switch? Is LLDP enabled?

[nick_s]

LLDP is enabled.  The switch is set to provide 802.3at and the R650 was also manually set to the same.  There were no power warnings on the R650 as I have seen with my R720. 

[Squozen]

What's the switch? I'm not seeing that behaviour with my rubbish TP-Link.

[nick_s]

It's a Brocade ICX6450, I tried different ports with the same issue.  If my ICX6610 had POE I would try that.  What kind of speeds do you see with your setup?