Lots of toys – ROG True Voltitian and in-OS software
As already mentioned, the Z690 Apex comes with various gadgets in software and hardware. This includes a USB oscilloscope that Asus calls the “ROG True Voltitian”. This has three channels and can either be connected directly to specially designed measuring points on the mainboard, or measure any other devices. For this purpose there are a number of jumpers to configure the measuring range to 3V, 5V or 12V.
To read out the data, Asus provides several software tools that only need to be started on a system with USB connection to the oscilloscope. For this, both the system with the mainboard itself can be used with an onboard USB 2 port or an external device, such as a notebook, can be connected via micro USB.
The ROG True Voltitian software tool is effectively a local application server that provides a website and can be accessed with a browser. Here you can easily set the parameters of the oscillator, such as the sampling rate or trigger values – electrical engineers will feel right at home here. And interesting observations can already be made during the first walking attempts. The screenshot shows HWinfo monitoring the CPU voltage Vcore, which is set to Die Sense in the BIOS and should therefore return a very accurate value. The sample rate of HWinfo is set to 500 ms.
Even a simple Cinebench R23 run shows a discrepancy in the minimum and maximum CPU voltage values between HWinfo and the ROG True Voltitian. Thus, the latter manages to record 1.237 V as the lowest value, while HWinfo only records a voltage drop to 1.270 V. After all, 33 mV lower is actually the voltage that causes the CPU to crash in case of doubt. By the way, the V_Latch mechanism of the motherboard itself can’t quite keep up with the USB Oszi and only notices a drop to 1.244 V. Exactly this information can now be used to optimize the CPU power supply accordingly, be it via switching frequency, load line calibration or other options. Unfortunately, the guide for the ROG True Voltitian is not available on the motherboard’s official support page, but here.
Another useful tool is the “Tool.exe”. Actually, this inconspicuously named piece of software was only intended for internal testing purposes in the Asus R&D department. However, it was decided to make a public version available to enthusiasts as well. Thankfully, because it contains a whole toolbox of mini-tools that I can’t even begin to list. For example, it can be used to read the SPD of DDR5, change the LLC from the OS, adjust the V/F curve of CPU and cache in the OS, change the boost multipliers, adjust the parameters of Thermal Velocity Boost, and much, much more.
Of course, we are far from finished, because the well-known tools TurboV Core and MemTweakIt have also received an update for Z690. Thus, the former can still be used to control voltages and multipliers for CPU, cache, system agent and various others.
Equally well known should be the piece of software for changing RAM timings in real time, which by the way works very well not only on Asus boards, but also with other manufacturers. Especially for overclocking and benchmarking, this tool saves a lot of time when you don’t have to reboot into the BIOS for every small timing adjustment.
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