Max Operating Temperature
To check the operating temperatures, I run Blender instead of Prime95 and small FFTs, which apply an unrealistically high load to the CPU.
I removed the power limit in the Z690 mainboard. Hence the processor went full speed, reaching the thermal limit where it throttled.
VRM Performance, Temperatures & Overclocking
Since the peak power performance doesn’t state much about the VRM performance, I thought to provide you with the following graphs, which clearly show the VRM’s response in CPU transient loads.
I don’t see any major overshoots during the start of the demanding Prime95 tests, indicating that the mainboard’s VRMs can handle a power-beast like the 12900KF.
I even left Prime95 running for over a half-hour period, noticing over 400W power spikes. The VRMs didn’t get hot, as shown in the screenshot above.
The B760 chipset is the choice for users on a tight budget who don’t want to spend much to get a mainboard using the Z790 chipset. Besides overclocking options not present in B760, the main difference is the half-bandwidth of the DMI link between the CPU and the chipset, from 8x to 4x. This affects the number of peripheral devices that the B760 chipset can handle.