2021 BRN Discussion, page-132

https://gizmodo.com/a-1990s-imac-processor-powers-nasa-s-perseverance-rover-1846380844

A 1990s iMac Processor Powers NASA’s Perseverance Rover

However, there’s a major difference between the iMac’s CPU and the one inside the Perseverance rover. BAE Systems manufactures the radiation-hardened version of the PowerPC 750, dubbed RAD750, which can withstand 200,000 to 1,000,000 Rads and temperatures between −55 and 125 degrees Celsius (-67 and 257 degrees Fahrenheit). Mars doesn’t have the same type of atmosphere as Earth, which protects us from the the sun’s rays, so one flash of sunlight and it’s all over for the Mars rover before its adventure can begin. Each one costs more than $200,000, so some extra protection is necessary.