I have an AMD Phenom II X4 850, do i NEED to upgrade (emphasis on need) ???
Why do you ask?
It's not a bad CPU. But incorrectly named. Its more like an Athlon II x4 as it lacks any form of L3 cache. Makes it a bit slower then you would normally think. Good for a budget gaming system, but there is plenty better options.
You don't "need" to... but it would be highly recommended.