ASRock Z390 Phantom Gaming 7 Motherboard Review


Disclaimer: Overclocking is never guaranteed, so the results may vary depending on certain conditions and various hardware configurations. I am not recommending overclocking if you do not know what are you doing. High voltages may damage your hardware and it will not be covered by warranty.


Surprisingly overclocking was a doddle, the BIOS was extremely easy to use and I managed to overclock our Core i7-8700K from the default speed of 3.7 GHz to an admirable 5.0GHz with excellent stability. All of this was done on air cooling!

All we did was set the CPU ratio to “All Core” at 50 and set the CPU Cache Ratio to 37.


When overclocking you’ll always need a little extra CPU voltage … but oddly, in this case I didn’t. I did select “Fixed Mode” for CPU Core/Cache voltage, the Fixed Voltage itself was set to AUTO. I also selected the CPU Load-Line Calibration to either Level 2.


The CPU Core voltage is pretty high at 1.408v … so be careful when setting to AUTO. All other readings looked normal for an overclocked 5.0GHz processor.


OC Load Temps

Load temps on our overclocked Core i7-8700K went through the roof reaching a shockingly high of  99 degrees Celsius. CPU throttling kicked in during this test.

Again, if you plan to overclock … I 100% recommend you get a large AIO cooler 


Latest Headlines

About Winston 3748 Articles
Winston has over 20 years of experience in the I.T. Industry. He launched Funky Kit with the aim to capture a wider audience worldwide. His knowledge in PC hardware is very distinguished, not only publishing enjoyable reviews but also writing great articles.