We took note of the drive’s temperature during some of our benchmarking runs.
Corsair's MP700 Elite with Heatsink uses Phison's latest Gen5 controller, the PS5031-E31T which has been designed to run cooler than Phison's first Gen5 controller, the mighty E26 and to help enable this the E31T uses a 7nm process. The passive cooler that Corsair has used for the drive isn't as chunky as some we've seen for a Gen 5 drive.
Under benchmarking the hottest the drive got was 42°C when the drive was running the ATTO benchmark which is 28°C off the maximum operating temperature of 70°C. For the majority of the testing, the drive averaged 36.4°C which for a Gen5 drive is very impressive while the 4 K-based tests averaged out at 33°C, another impressive figure.