Power Consumption

Power Consumption

Here's where we'll slowly move into actually testing the processors and respective chipsets. Ivy Bridge based processors are a bit of a redesign alright with the die-shrink, and as a result they are energy friendly processors with a 77W (for the enthusiast models). What you'll notice a lot, is that in idle these things kick ass in matters of power consumption, whereas at peak TDP they behave quite normally.

In an IDLE state the PC (Z77 / 3770K / 8GB memory / GeForce GTX 580 / SSD) consumes 81 Watts on the motherboard. Mind you that we measure the ENTIRE PC, not just the processor's power consumption.

When we place load on the CPU and we see the power draw rise, the system now consumes roughly 161 Watts. This is with merely an SSD, memory and the GTX580 installed. Your average PC will draw a little more power if you add optical drives, HDDs, soundcards etc.

Overclocked power consumption remains very good at 229W @ 5000 MHz / 1.425V, we'll explain later.

I want to make it very clear that power consumption measurements will differ per PC and setup. Your attached components use power but your motherboard can also have additional ICs installed like an audio controller, LUCID chips, network controllers, extra SATA controllers, extra USB controllers, and so on. These parts all consume power, so this is an indication.

Next to that, we stress all CPU cores 100% and thus show a PEAK power consumption. Unless you transcode video with the right software your overall/average power consumption will be much lower.

An interesting observation, after selecting default settings in the BIOS, the turbo frequencies have been tweaked a little .. the default turbo clock is locked and loaded at 3900 MHz opposed to 3600 MHz.