Just to share what I've been observing with the "power spikes" and HWINFO64. Spikes seem to occur every 5-6 polling intervals (time = 100ms)

V9 (Intensity 8 ):

Fury Nitro:

1110/550, -108mv, ~352 S/s;

GPU Core Current: AVG 153A, but spikes as high as 247A

GPU Core Power: AVG 173W, but spikes as high as 280W

1140/550, -12mv, ~360 S/s;

GPU Core Current: AVG 175A, but spikes as high as 310A

GPU Core Power: AVG 210W, but spikes as high as 370W

RX470 Nitro 8GB:

1300/2100, -100mv, ~223 S/s;

GPU Core Current: AVG 78A, but spikes as high as 126A

GPU Core Power: AVG 78.3W, but spikes as high as 126W


V8 (Intensity 4 ):

Fury Nitro:

1110/550, -108mv, ~300 S/s;

GPU Core Current: AVG 145A, but spikes as high as 192A

GPU Core Power: AVG 165W, but spikes as high as 218W

1140/550, -12mv, ~310 S/s;

GPU Core Current: AVG 180A, but spikes as high as 224A

GPU Core Power: AVG 207W, but spikes as high as 274W

RX470 Nitro 8GB:

1300/2100, -100mv, ~190 S/s;

GPU Core Current: AVG 75A, but spikes as high as 99A

GPU Core Power: AVG 74.5W, but spikes as high as 99.6W