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ASRock X99 Extreme6/ac (Intel X99) Motherboard Review

By: Steven Bassiri | Socket LGA 2011 in Motherboards | Posted: Apr 11, 2015 2:15 am
TweakTown Rating: 93%Manufacturer: ASRock

Temperature and Power Consumption

 

System power usage is measured at the AC/DC PSU (the Corsair AX1200i) which I have connected to another system to measure the test system and as a backup I have a wall meter to verify. The CPU power is measured through the 8-pin connect which is hooked up to a hall effect IC which measures current and puts out a voltage in proportion to the current. That voltage is logged by a National Instruments ADC which logs the DC voltage level, which I then convert into current.

 

asrock-x99-extreme6-ac-intel-motherboard-review

 

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 really 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 frontside and backside of the PCB. Keep in mind that the majority of the heat from the VRM goes into the PCB as it is a giant soldered on copper heat sink. A smaller 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.

 

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Full frontal.

 

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Up close of the front of the VRM.

 

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Up close of the back of the VRM.

 

Thermal Testing at 4.5GHz Overclocked Speeds:

 

asrock-x99-extreme6-ac-intel-motherboard-reviewasrock-x99-extreme6-ac-intel-motherboard-review

 

Full frontal.

 

asrock-x99-extreme6-ac-intel-motherboard-reviewasrock-x99-extreme6-ac-intel-motherboard-review

 

Up close of the front of the VRM.

 

asrock-x99-extreme6-ac-intel-motherboard-reviewasrock-x99-extreme6-ac-intel-motherboard-review

 

Up close of the back of the VRM.

 

The VRM on the X99 Extreme6/ac is very well equipped to handle high current loads, and the heat sink is equally effective at removing heat from the VRM. At full load the front is always hotter than the back of the PCB and never goes above 60C, which puts it in the excellent category when it comes to VRM performance.

 

If you look closely at idle thermals at stock, you can see that the Intersil PWM shuts off all but 1 phase (2 when doubled) to reduce heat and improve efficiency. Overall, the VRM performs great in thermal testing.

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