When you go to the Intel Download Center , you'll see choices between 32-bit and 64-bit MSI files. Intel® Processor Diagnostic Tool
The is a free, official utility designed to verify the health and functionality of an Intel processor. It doesn't just check if your CPU is "on"; it puts it through a rigorous series of tests to ensure every part of the silicon is doing exactly what it was engineered to do. Why "64-bit MSI"? Download ipdt installer 64bit msi
Here is an interesting look into what this file actually does and why it exists in this specific format. What is the "IPDT"? When you go to the Intel Download Center