[Xperia Z2 General] Haldi4803:
I've made some tests under FULL load via CPU Prime Benchmark.

The SoC got aroun 78-82°C and the battery around 50°C Felt like it was burning ^^

CPU Full load Test NR: 31

Modified Stock Rom 402 + Doomkernel v09

qualcom Hotplug, ondemand governor, Trepn Profiler running (BatteryPower only!)

10 Minute Test, CPU Prime Bench

Minimum screen brightness

Core 0	Core 1	Core 2	Core 3
300000	0.00 %	0.00 %	0.59 %	0.00 %
422400	0.00 %	0.00 %	0.02 %	0.00 %
652800	53.15 %	0.00 %	0.04 %	53.15 %
729600	3.31 %	0.00 %	0.01 %	3.31 %
883200	34.88 %	0.00 %	0.05 %	34.87 %
960000	0.02 %	0.00 %	3.01 %	0.02 %
1036800	0.00 %	0.00 %	0.04 %	0.00 %
1190400	1.37 %	4.30 %	0.40 %	1.76 %
1267200	0.00 %	0.03 %	0.02 %	0.00 %
1497600	3.23 %	0.02 %	0.04 %	3.23 %
1574400	0.04 %	0.25 %	0.28 %	0.02 %
1728000	2.98 %	0.00 %	0.01 %	2.98 %
1958400	0.01 %	0.01 %	0.02 %	0.00 %
2265600	1.02 %	95.43 %	95.45 %	1.01 %
2457600	0.00 %	0.00 %	0.00 %	0.00 %
Total Online	100.00%	100.03%	99.98%	100.35%
Total Offline	0.00 %	-0.03 %	0.02 %	-0.35 %

Batterydrain: Average: 1808.91mA Total: 311.51mAh in 620Seconds

You can see it throttle after ca 50 seconds.

CPU Full load Test NR: 32

Modified Stock Rom 402 + Doomkernel v09

qualcom Hotplug, ondemand governor, Trepn Profiler running (BatteryPower only!)

10 Minute Test, CPU Prime Bench

Minimum screen brightness

MAXIMUM 1500mhz Clock

Core 0	Core 1	Core 2	Core 3
300000	1.00 %	0.86 %	1.00 %	0.96 %
422400	0.06 %	0.01 %	0.04 %	0.05 %
652800	0.08 %	0.04 %	0.04 %	0.03 %
729600	0.01 %	0.01 %	0.00 %	0.01 %
883200	0.00 %	0.00 %	0.01 %	0.02 %
960000	2.47 %	2.53 %	2.04 %	2.57 %
1036800	27.37 %	0.03 %	0.08 %	27.42 %
1190400	0.47 %	0.76 %	0.70 %	0.43 %
1267200	18.76 %	0.01 %	0.00 %	18.61 %
1497600	49.78 %	95.75 %	96.06 %	49.93 %
1574400	0.00 %	0.00 %	0.00 %	0.00 %
1728000	0.00 %	0.00 %	0.00 %	0.00 %
1958400	0.00 %	0.00 %	0.00 %	0.00 %
2265600	0.00 %	0.00 %	0.00 %	0.00 %
2457600	0.00 %	0.00 %	0.00 %	0.00 %
Total Online	100.00%	99.99 %	99.98 %	100.01%
Total Offline	0.00 %	0.01 %	0.02 %	-0.01 %

Batterydrain: Average: 1359.69mA Total: 233.48mAh in 618Seconds

You can see the throttling is WAY less when set to maximum 1500mhz ! But it's still existing.

CPU Full load Test NR: 33

Modified Stock Rom 402 + Doomkernel v09

qualcom Hotplug, ondemand governor, Trepn Profiler running (BatteryPower only!)

10 Minute Test, CPU Prime Bench

Minimum screen brightness

MAXIMUM 1000mhz Clock

Core 0	Core 1	Core 2	Core 3
300000	0.37 %	0.49 %	0.40 %	0.52 %
422400	0.06 %	0.03 %	0.04 %	0.08 %
652800	0.11 %	0.05 %	0.02 %	0.08 %
729600	0.02 %	0.00 %	0.03 %	0.01 %
883200	0.02 %	0.03 %	0.04 %	0.02 %
960000	2.94 %	3.13 %	2.93 %	2.77 %
1036800	96.48 %	96.25 %	96.51 %	96.45 %
1190400	0.00 %	0.00 %	0.00 %	0.00 %
1267200	0.00 %	0.00 %	0.00 %	0.00 %
1497600	0.00 %	0.00 %	0.00 %	0.00 %
1574400	0.00 %	0.00 %	0.00 %	0.00 %
1728000	0.00 %	0.00 %	0.00 %	0.00 %
1958400	0.00 %	0.00 %	0.00 %	0.00 %
2265600	0.00 %	0.00 %	0.00 %	0.00 %
2457600	0.00 %	0.00 %	0.00 %	0.00 %
Total Online	100.00%	99.99 %	99.98 %	99.94 %
Total Offline	0.00 %	0.01 %	0.02 %	0.06 %

Batterydrain: Average: 962.26mA Total: 170.80mAh in 640Seconds

the throttling is fully gone when set to 1000mhz max

CPU Full load Test NR: 34

Modified Stock Rom 402 + Doomkernel v09

qualcom Hotplug, ondemand governor, Trepn Profiler running (BatteryPower only!)

10 Minute Test, CPU Prime Bench

Minimum screen brightness

MAXIMUM 300mhz clock

Core 0	Core 1	Core 2	Core 3
300000	100.00%	100.06%	100.01%	100.01%
422400	0.00 %	0.00 %	0.00 %	0.00 %
652800	0.00 %	0.00 %	0.00 %	0.00 %
729600	0.00 %	0.00 %	0.00 %	0.00 %
883200	0.00 %	0.00 %	0.00 %	0.00 %
960000	0.00 %	0.00 %	0.00 %	0.00 %
1036800	0.00 %	0.00 %	0.00 %	0.00 %
1190400	0.00 %	0.00 %	0.00 %	0.00 %
1267200	0.00 %	0.00 %	0.00 %	0.00 %
1497600	0.00 %	0.00 %	0.00 %	0.00 %
1574400	0.00 %	0.00 %	0.00 %	0.00 %
1728000	0.00 %	0.00 %	0.00 %	0.00 %
1958400	0.00 %	0.00 %	0.00 %	0.00 %
2265600	0.00 %	0.00 %	0.00 %	0.00 %
2457600	0.00 %	0.00 %	0.00 %	0.00 %
Total Online	100.00%	100.06%	100.01%	100.01%
Total Offline	0.00 %	-0.06 %	-0.01 %	-0.01 %

Batterydrain: Average: 444.27mA Total: 86.89mAh in 704Seconds

the loadline is somewhat going up and down here ^^

As you can see, if you compare to my older Benchmarks, 4 cores at FULL load on 300mhz use roughly as much energy as the phone on a daily basis with my "Normal" Benchmark.