@Stewart The new BIOS fixed the issue so now all 5 ports run at 2.5Gbe. It also sets much higher default PL1, PL2, and PL4 settings. The temps still stay in normal parameters but isn't the most efficient. I've run 17 different combinations of PL1 and PL2 with the default PL4 of 33W to find the best speed and then started adjusting PL4 to fine tune. Maybe not the best way of doing it but that was my process. Overall I found the best combination of speed and power for iperf over OpenVPN is:
PL1=9
PL2=10
PL4=30
Dropping PL1 to 8 impacts performance about 60Mbps but doesn't reduce heat or power.
Dropping PL2 to 8 also reduces performance but doesn't reduce heat or power.
PL4 default is now 33. Lowering it to 30 reduces temps from 69C to 61-62C and lowers speed from 575Mbps to 550Mbps. Lowering it to 29 reduces speed to 490 and keeps temp at 61C so no real change.
Temp was determined by running iperf -P4 -t 300 and seeing what the temp was just before the end of the run. Everything seemed to idle the same no matter what the settings were at around 45C. Skin of the unit is always warm to the touch. I have a thermometer that I've set on top that generally reads 33C-34C (around 95F). It also doesn't seem to change much whether it is idle or under heavy load. The unit idles around 11W no matter the settings and, depending on PL settings, only goes up to 15-18W (most all settings showed 15W as the load limit for the iperf tests). For reference it does spike into the mid-20's in Windows.
Speed was determined by the average of the last 10 seconds of the 5 minute test. I felt that I had to do this as the tests generally started out very high, in the 1.2Gbps-1.4Gbps range, and then fell over the course of the first minute to settle around the 5 minute average. Sometimes it would hold that for 5-10 seconds, some times for over 40 seconds. No idea unless it's some kind of TAU setting allowing the assigned core to spike for varying amounts of times.
