Graphics Card Thermal Imaging Measurements (FLIR)
Thermal Imaging Temperature Measurements
A new addition to our reviews will be the inclusion of Forward Looking Infra Red thermal images of hardware. Over the past years we have been trying to figure out what the best possible way is to measure temperatures on hardware. Multiple options are available but the best thing to do is to visualize heat coming from the product or component being tested. The downside of thermal imaging hardware is simple, FLIR camera's with a bit of decent resolution costs up-to 10,000 EUR. Hence we passed on it for a long time. With a thermal imaging camera a special lens focuses the infrared light emitted by all of the objects in view. This focused light is scanned by a phased array of infrared-detector elements. The detector elements create a very detailed temperature pattern called a thermogram. It only takes about one-thirtieth of a second for the detector array to obtain the temperature information to make the thermogram. This information is obtained from several thousand points in the field of view of the detector array. The thermogram created by the detector elements is translated into electric impulses. The impulses are sent to a signal-processing unit, a circuit board with a dedicated chip that translates the information from the elements into data for the display. The signal-processing unit sends the information to the display, where it appears as various colors depending on the intensity of the infrared emission. The combination of all the impulses from all of the elements creates the image. We can seek hotspots on the PCB indicating, for example, GPU but also VRM temperature as well as how heat is distributed throughout a product. We do hope you will enjoy this new technology as it did cost us an arm and a leg to be able to implement it.
We can measure pretty accurate temperatures at the GPUs and VRM areas. So once we start to stress the GPU the thermals quickly change. We can measure thermals down to a 10th of a degree, our thermal camera was calibrated in 2016.
- We reach almost 69 degrees C on M1, the GPU marker at the back-plate.
- M4 registers an 69 Degrees C range for the VRM area.
The overall thermal image looks fine. But let's move to the top side.
When we position the thermal camera outwards we can see that the card lights up at M1 to M5. M3 is at 69 Degrees C, meaning we are spot on the VRM area, maybe even hitting a component. We find this thermal image to be fine.
Warm air is exhausted at the top side and ventilation surface areas. Most of the heat is not exhausted as you can see, meaning warm air is ventilated into your chassis, hence a PC chassis with proper airflow (intake/exhaust) is mandatory. The overall heat signature of the graphics card I'd rate is good.
