4Ghz stable requires phase change cooling. so yea, thats not quite on topic
high 4's like 4.3ish is around 17 12V amps from my calculations from watching heatload results on some high end overclocks. But I would want some STABLE rails at those levels
heatload != wattage, but its the best indicator I can come up with off the top of my head. In other words, YMMV