Gigabyte makes some bold claims, they state Ultra Durable 3 motherboards are able to deliver up to 50°C cooler working temperatures than traditional motherboards.
GIGABYTE UNITED INC., a leading manufacturer of motherboards and graphics cards today is pleased to introduce their revolutionary Ultra Durable 3 technology, the industry's first consumer desktop motherboard design to feature 2 ounces of copper for both the Power and Ground layers, delivering a dramatically lower system temperature, improved energy efficiency and enhanced stability for overclocking. GIGABYTE once again leads the motherboard industry for the highest quality, most innovative motherboard design with the launch of their latest Ultra Durable 3 technology. Ultra Durable 3 motherboards are the first consumer desktop motherboards to feature double the amount of copper for the Power and Ground layers of the PCB. Most traditional motherboard designs utilize a single ounce of copper for each layer, whereas GIGABYTE's ultra Durable 3 motherboards feature 2 ounces per layer.More info at Techpowerup.
Doubling the amount of copper provides a more effective thermal cooling solution by delivering a more efficient spreading of heat from critical areas of the motherboard such as the CPU power zone throughout the entire PCB. In fact, GIGABYTE Ultra Durable 3 motherboards are able to deliver up to 50°C cooler working temperatures than traditional motherboards.
In addition, doubling the amount of copper lowers the PCB impedance by 2X. Impedance is a measure of how much the circuit impedes the flow of current. The less the flow of current is impeded, the less amount of energy is wasted. For GIGABYTE Ultra Durable 3 motherboards, this means total PCB electrical waste is reduced by 2X, which also means less heat is generated. 2 ounces of copper also provides improved signal quality, providing better system stability and allowing for greater margins for overclocking.