Thermal Imaging and Power Consumption
System power is measured at the wall with an AC power meter.
Note on Thermal Images: In the temperature section, we use our Seek thermal imaging camera to capture the surface temperatures of major components on the board. I look at the VRM and then all other things that light up the screen. If there is something to worry about, then I will state it. Otherwise, I will just show the hotter running parts of the board for fun. Unless some component is over 80-90C, then there isn't anything to worry about.
All systems will act differently, so I will look for commonalities, such as how far from the VRM the heat spreads through the PCB and the difference in temperature between the front side and backside of the PCB. Keep in mind, the majority of the heat from the VRM goes into the PCB as it is a giant soldered on copper heat sink. A larger difference in temperature between the back and front of the PCB points towards a more effective heat sink.
Thermal Testing at Stock Speeds:
The image on the left is always at idle, and the image on the right is at load. During ALL TESTS, fans above the VRM that cool the CPU cooler's (Corsair H110i) radiator are turned on to high (12v).
Up-close of the front of the VRM.
The VRM thermal imaging shows off Intersil's new power stages, and PWM controller is a great way. Intersil's new smart power stages integrate temperature and current sensing inside each power stage and work in concert with the PWM controller to shift load to phases that are cooler or are handling less current. Overall, thermal performance is excellent at stock, especially with the larger heat sink.
Up-close of the back of the VRM.
4.4GHz 2.1V VCCIN OCed VRM Thermal Imaging:
Airflow from the radiator that cools the CPU is directed in the direction of the VRMs from the right side of the motherboard to the left, and a dedicated 120mm fan is mounting above the VRM and blows directly at it. We get our results at loop 25 of Intel Burn Test, they are lower than the temperatures you see above (the stock results), as they don't have the fan over them.
The results are excellent, and the VRM heat sink is doing an excellent job. I was shocked that the temperature under the VRM area is cooler than that at the top of the inductors because it shows that the VRM is being cooled properly. ASRock has done a nice job with the bigger heat sink, and it shows.
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- Page 1 [Introduction, Specifications, and Pricing]
- Page 2 [Packaging and X299 OC Formula Overview]
- Page 3 [ASRock X299 OC Formula Circuit Analysis]
- Page 4 [ASRock X299 OC Formula Circuit Analysis Continued]
- Page 5 [BIOS and Software]
- Page 6 [Test System Setup]
- Page 7 [Overclocking]
- Page 8 [CPU, Memory, and System Benchmarks]
- Page 9 [System IO Benchmarks]
- Page 10 [VRM and System Thermal Imaging and Power Consumption]
- Page 11 [What's Hot, What's Not & Final Thoughts]
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