As a single card, the ASUS GeForce GTX 780 card was the winner, and we managed to overclock its GPU to 1055MHz, and for its video memory, it was overclocked to 6468MHz. For the MSI card, we managed to overclock it to 1058MHz, while its video memory was pushed to an operating frequency of 6456MHz. Though the latter card was pushed to higher clock speeds, it was the ASUS card that managed to outperform the MSI one, with a very slim margin that ranged from 0.77- to 0.84%.
In our 2-way SLI testing, it was the MSI cards that claimed victorious, leading the ASUS pair by margins that ranged from 0.75- to 1.4 percent. When compared to the Titan, the overclocked GTX 780 customs cards outperformed it on both fronts; as a single card and in 2-way SLI configuration. Generally speaking, they outperformed the stock Titan in the range of 4 to 11% in their overclocked states.
The custom cooler of the ASUS GTX 780 card proved to be extremely effective in cooling the card. It had the lowest operating temperature at just 46 degrees Celsius! While under load in 2-way SLI configuration, it also had the second lowest temperature of 73 degrees Celsius. This was because the pair of Titans recorded an even lower operating temperature at 70 degrees Celsius. Their lower operating temperatures were also due to their lower clock speeds of their GPUs. The MSI GTX 780 card has the highest clock speed of 902MHz; while ASUS is rated at 889HMz, and the reference GTX Titan is rated at 836MHz. Surprisingly, the temperature results across the board seem much lower than anticipated with the latest driver set, but we're still in the midst of verifying if they are the main reason. In any case, the relative standings are looking positive for ASUS.
At its idle state, the MSI's GeForce GTX 780 card surprisingly drew the least power at 145W, but under load, its power consumption level shot up to 426W. The ASUS GeForce GTX 780 had the lowest power consumption levels under load, as a single card as well as in 2-way SLI configuration. The outcome is very likely due to the lower clock speeds of the ASUS card, but it's still nevertheless overclocked and from what we've tested before, the reference card actually reported higher temperatures that matched the MSI graphics card. Oddly, the ASUS card registered the highest power draw at idle. Meanwhile, power consumption profiles of the MSI GeForce GTX 780 and the reference GeForce GTX Titan were rather similar during our testing.