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To test the board's cooling, we stress the CPU for ~15 minutes with Prime95/CPU Burn. Temperatures of the boards' chipset and VRM heatsinks (if applicable) are recorded using a spot thermometer. The highest temperatures are taken for comparison.
As the P8Z77-V Pro has an impressively sized PCH heatsink, it was hardly shocking that the hottest temperature reading we measured was just 18°C above ambient, substantially lower than the other boards compared above. The same can't be said for the VRM heatsinks, even with the heatspreaders on the trace side of the motherboard lending a helping hand. It's a bit surprising considering how energy efficient the board is on load.
To test boot time we optimize the BIOS menu by setting the hard drive and other delays set to minimum, taking care not to disable common functionality like USB support, POST messages, etc. and measure the time it takes to reach the Windows loading screen (we stop here because this is the point where the O/S drive speed becomes a factor).
The P8Z77-V Pro's boot delay was about average for an LGA1155 board, getting to the Windows loading screen in just over 14 seconds.
USB 3.0 Performance
In addition to the native support provided by the Z77 chipset, the P8Z77-V Pro has a secondary ASMedia USB 3.0 controller. They performed similarly in a large file transfer test from
a USB 3.0-connected WD VelociRaptor
600GB to an internal drive. AI Suite has a featured called "USB 3.0 Boost" that Asus claims increases USB 3.0 performance but we found it didn't make any difference.
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