Gigabyte GeForce GTX 1070 G1 GAMING review - 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 10^th of a degree, our thermal camera was calibrated in 2016. Gigabyte enforces a backplate that has a closed design, we're not  excited about it as that can and will trap heat. Removing it would also defy the purpuso of this test:

• We reach almost 50 degrees C on M1, the GPU marker at the back-plate.
• At M2 (Measure Point 3) the PCB area / backplate temp can be measured it runs just close to 50 Degrees C on that spot. 

The thermal image clearly shows that the back-plate is trapping heat. We've seen closed back-plate designs on the founder edition cards, and such ones are not our favorites, we like to see lots of gaps to vent. 

When we position the thermal camera outwards we can see that the overall cooler design really works well, there are no danger spots relative towards hot temperatures. The hottest point is the top side of the card where there is some residual heat detected. M1 is the hottest spot at 56 Degrees C. Remember, this is the graphics card 100% stressed in a FireStrike scene 1 loop. Also if you look closely to the left side, the front exit is not lighting up, meaning very little hot air is passing through there. Most of it will be exhausted into your chassis.

As stated, most heat is exhausted at the top side, at the M1 position we do see that quite well, it is very little though. The card produces merely a bit of heat under full stress so ventilation inside your PC is as always must. This level of residual heat is easy to vent.