There are three generations of the i5 8400: the original, the Haswell-E, and the Broadwell-E. Each generation has its own set of pros and cons. Here, we'll take a look at the differences between these three generations and recommend which one is best for you. The original i5 8400 is a good option if you don't need any extra features or want to save money. It's cheaper than the other two generations, performs similarly, and has a longer warranty. However, it doesn't have any extra security features, so it's not as safe as the other two generations. The Haswell-E is the most powerful generation of i5 8400. It offers better performance than the original and has a longer warranty period. However, it's more expensive than the original and doesn't come with any extra security features. The Broadwell-E is the latest generation of i5 8400. It offers even better performance than the Haswell-E and has a shorter warranty period. However, it's also more expensive than the Haswell-E and doesn't come with any extra security features.