We are now able to find out what kind of power is being used by our test system and the associated graphics cards installed. Keep in mind; it tests the complete system (minus LCD monitor, which is plugged directly into an AC wall socket).
There are a few important notes to remember though; while our maximum power is taken in 3DMark06 at the same exact point, we have seen in particular tests the power being drawn as much as 10% more. We test at the exact same stage every time; therefore tests should be very consistent and accurate.
The other thing to remember is that our test system is bare minimum - only a 7,200RPM SATA-II single hard drive is used without CD-ROM or many cooling fans.
So while the system might draw 400 watts in our test system, placing it into your own PC with a number of other items, the draw is going to be higher.
Power wise, both boards consume just about the same amount at stock speeds. The EP45-UD3P manages just a slight drop thanks to newer components along with the UD3s new PCB design.
As a new measure, we are now monitoring the heat generation from the key components on the motherboards, this being the Northbridge, Southbridge (if it contains one) as well as the Mosfets around the CPU. The results are recorded at idle and load during the power consumption tests.
Here is where we see a change; the UD3P manages to drop heat on the NB, SB and Mosfets by a bit, but it's not here that the real benefits are. The PCB temps are supposed to drop with UD3, but we couldn't really test that as we don't have an IR camera to test this out. However, we were greeted with lower motherboard temps according to the software utility in windows. How accurate they are is left to you, but a 10 degree drop was registered.