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ASRock X99 OC Formula/3.1 (Intel X99) Motherboard Review

By: Steven Bassiri | Socket LGA 2011 in Motherboards | Posted: Jul 6, 2015 8:13 pm
TweakTown Rating: 92%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 connector 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.

 

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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 front side 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 larger difference in temperature between the back and front of the PCB points towards a more effective heat sink.

 

Anything under 60C is excellent, 60-80C is acceptable, and anything above 80C is a bit worrisome (if at stock).

 

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:

 

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Full frontal.

 

asrock-x99-oc-formula-3-1-intel-motherboard-reviewasrock-x99-oc-formula-3-1-intel-motherboard-review

 

Up-close of the front of the VRM.

 

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Up-close of the back of the VRM.

 

The VRM on the X99 OC Formula has double the number of MOSFETs compared to the other 1300W VRMs on other ASRock X99 motherboards. Since the number of MOSFETs is so high (24), ASRock was forced to put half of them on the back of the PCB. You might expect that temperatures at idle be kind of high, but because of the phase shedding the temperatures stay very low even at idle.

 

Load performance is outstanding, this is perhaps one of the coolest running X99 VRMs I have tested to date. The temperature on the back of the PCB never exceeded the temperature on the front, even with half the MOSFETs on the back. CPU load power draw is also quite low compared to many other models, which is a sign of a high efficiency VRM.

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