GeForce RTX 4090 Founders edition review - Graphics Card Thermal Imaging Measurements (FLIR)

Thermal Imaging Temperature Measurements

To visualize heat coming from the product or component being tested more accurately, we make use of thermal imaging hardware, also what you know as a FLIR camera. FLIR is a brand and short for Forward-looking Infrared. 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 colours depending on the intensity of the infrared emission. The combination of all the impulses from all of the elements creates the image. You can see hotspots on the card or PCB indicating temperature bleeds, as well as how heat is distributed throughout a product.       

I've slightly changed the thermal image with the card and heatmap overlay, this will help you analyze it a little better.  Overall we have not seen any concerns.  For those that wonder, the card sits on a riser card to monitor power consumption.