To test power consumption today we are using a Keithley Integra unit and we measure power consumption from the VGA card inputs, not the system wide drain. We measure results while gaming in Crysis Warhead and record the results.
In such an energy aware climate, AMD are making a big deal out of their new ‘ZeroCore Power’ technology. Many solutions today use power gating, clock gating and memory compression to reduce idle power requirements, but ZeroCore power technology can completely power down the core GPU while the rest of the system remains active.
Over the months, AMD’s partners have fine tuned the power consumption from the reference board, and we can see that the AFOX single slot HD7850 demands a little less power under load. Not really that big a deal in the real world, but noticeable with our test equipment.