75-Minute Heat Run
Throughout our testing, it became clear that the Blade wasn't throttling or slowing down. This is great for gamers, but in a machine this thin, we were left wondering if heat would become an issue. After all of the other tests and measurements on the system were done, we wanted to see what it'd do under an extended heavy load. Our assumption was that it'd throttle eventually. We even thought our testing might break the notebook or its adapter.
We placed the Blade on a flat desk with a laminate surface, leaving plenty of space around and above it. Then, we made sure the power cord was tilted up, not blocking the left air vent. In a room at a constant 68 degrees Fahrenheit, we fired up our logger, fully loaded the CPU with Prime95, and pegged the graphics module with FurMark. The Blade ran under that load until temperatures stabilized, about 75 minutes later.
Using an infrared heat gun able to track emissivity, we measured the temperature of the Blade before and after the run.
The CPU and GPU are located in the top section of the Blade’s chassis, near the power button, while the hard drive is in the bottom-right corner below the Switchblade UI.
Naturally, CPU temperatures spike during the first couple of minutes. The chipset, which is close to the middle of the machine, and the hard drive maintain a similar temperature. Since the CPU is likely coupled to the chassis, all of the other components slowly heat up between the 5- and 20-minute mark as the chassis warms.
Between minutes 48 and 61, we lifted the machine to take measurements from its bottom panels. As you can see, the temperature of the chipset and hard drive both drop. That has no effect on the processor temperature, but it does show you might benefit from a vented laptop pad.
At minute 72, we inadvertently covered the exhaust from the CPU fan. It only took a few seconds for the processor to crest 100 degrees Celsius and pull the clock rate down from 2.9 to 2.2 GHz. Once the temperature dropped, the CPU ramped back up to 2.9 GHz. Although we didn't log it, the GPU never exceeded 90 degrees.
Throughout testing, we noted that the power adapter was pulling more than its rated 125 W. For the entire 75-minute run, Razer's Blade pulled between 155 and 165 W.
The above image shows the machine’s temperatures at the beginning of the run in normal office usage.
After 75 minutes of fully taxing the CPU and GPU, temperatures were, of course, higher.
The image above shows the power adapter during normal office usage.
And here are the temperatures at the end of the 75-minute heat run.
Overall, the Blade did well. While there were some warm spots on the top of the machine, none were too hot to touch. We also found it interesting that the area surrounding the WASD keys stayed cooler than the rest of the keyboard. The underside was too hot to have directly on your lap, and even briefly blocking the air vents causes the heat to spike. As long as you have some kind of laptop board or cooling pad, you should be fine under the greatest of duress.
The power adapter got hotter, but you could still pick it up without an issue. Generally, 140 degrees Fahrenheit is considered too hot to hold for more than a few seconds. And while the brick did break into the 130s, normal gaming temperatures hover under 110 degrees.