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.
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 PCB and the chokes. 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.
These were taken at stock speeds, on the left while idle and on the right while loaded. Notice how warm the X540 makes the heat sink.
These are the images of the VRM up close in idle conditions at stock, notice only 2 phases are lit! That is great power saving technology in action. The picture on the right is of the back of the board, notice the warm spots are from the right side of the image, near the rear IO, this is where the X540 is.
These images are during full load at stock clocks. While there are more phases on, either the heat hasn't spread to the rest of the phases or the PWM has decided that it only needs to use 6 phases instead of 12, the center 6 seem to be activated and 3 of the doublers/dual drivers in the back seem to be activated. This is very interesting, as the VRM isn't being stressed enough to activate all phases yet.
These pictures were taken at 4.5GHz full load. These temperatures are in the mid-50s which is on the cool side for VRM temperatures at this type of load. The fact is that the X540 is adding heat to the VRM heat sink, and this VRM is looking to be very strong.
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- Page 1 [Introduction, Specifications, and Pricing]
- Page 2 [Packaging and the X99 WS-E/10G]
- Page 3 [X99 WS-E/10G Circuit Analysis]
- Page 4 [The BIOS and Software]
- Page 5 [Test Setup and Overclocking]
- Page 6 [CPU, Memory, and System Benchmarks]
- Page 7 [System IO Benchmarks]
- Page 8 [Temperature and Power Consumption]
- Page 9 [Final Thoughts]
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