Thanks for the responses. I was mainly asking just in general, I'm not planing on building anything anytime soon. But when I do build, it'll be top-of-the-line, not just for Dolphin. It'll be for everything, including but not limited to PC games, video editing, emulation, virtual machines, etc, etc. Basically intensive tasks, and I keep my PCs for many years.
I have several 9+ year old machines that still run to this day, and I use them every now and again for basic internet surfing, writing documents, old games, nostalgia, etc. I've even built a retro rig dedicated to DOS games.
Current dream rig:
Intel Core i7 6700K
2x Nvidia GeForce 980 (2-way SLI)
16-32 GB DDR4 3200 RAM
Whole rig excluding keyboard, mouse, monitor, etc, would be around $2k give or take a couple hundred. But considering the amount of years it'll last, well worth it.
Just a general idea, Not happening any time soon though, just daydreaming. By the time I can build something they'll have much newer tech.
P.S. The main reason for this thread was becuase I was curious, I know Pentiums are fairly weak compared to the i7s, I just found it interesting how it could handle Dolphin so well and got curious as to how it would stack up with an i7 for any other tasks. i7 still wins by far in terms of PC Gaming and intensive tasks, video encoding, editing etc.