the pentium is haswell I don't even think the FAQ has anything about haswell that is why you don't see the pentium. Here for the dolphin benchmark a stock i7 4790k 4.3ghz turbo scores 6:59 on the dolphin cpu bench while a pentium sitting at 4.7ghz which is easily obtainable if you have an air cooler like the hyper 212 evo scores 7:05. So as you can see the pentium with an oc will demolish pretty much any game you can through out it through the emulator.
Intel i5-4690k @ 4.6 GHz | Gigabyte GTX 970 4GB G1 | 8 GB DDR3 @ 1600 MHz | Windows 10 TP | Dolphin 4.0-6811