Help with building PC with the FX series and a little overclock

The newest Pentiums are not 2 core / 2 thread, but 2 core / 4 thread like i3's. An FX-8xxx will have more total multithreaded performance than a Pentium G4560, but will still generally lose in games because each of those cores is only about half as fast,though it depends on the game. They are 2-3x more expensive after all, and will win in well-threaded titles. The Pentium beats FX 6 cores flat out, as it has more single- and multi-threaded performance. Honestly, an FX-8 is probably a slightly stronger chip overall, but it's largely in the same league as the Pentium, much more expensive and much more power hungry, on an old and dead socket, so it's hard to recommend.

G3258's never really had a reputation for overheating. Intel CPUs give higher temperature readings than AMD chips, but as far as the user is concerned, this is just an arbitrary number. They don't measure temperatures the same way, so you can't compare them 1:1, and if the Pentium can run up to 100c safely and reliably and is running at 70c, while an FX can run up to 65c safely and is running at 60c, which one is hotter? Certainly the FX is much closer to damage from heat.

Today, the only Intel CPUs that can be overclocked are those marked as "K", the i3 7350K, i5 7600K and i7 7700K, and they're expensive. They need to be paired with expensive "Z" chipset motherboards, and I don't consider them a good value, so you can't overclock a Pentium. Maybe AMD's new competitive Ryzen CPUs will shake things up, but it takes time - CPUs are often in the pipeline for years before they hit the market and you can't just make changes to them at the last minute. It's more like years.

Given that the Pentium can't be overclocked, there's no point in an expensive board. Even the cheapest Intel board can run the most expensive Intel CPU that fits in its socket without problems, unlike socket AM3+ where power consumption on the high-end chips would cause instability in inexpensive boards. The Pentium also has a power-sipping 54w TDP, which will be cool and quiet under Intel's stock cooler. My opinion, get something like a $70 B250-chipset board with 8-16GB of DDR4 2400 and use Intel's stock cooler. Either buy the Pentium G4560 at $60, the i3 7100 at $120 (which isn't all that much faster) or the i5 7500 at $200, which is a true quad and the next real, significant step up.

You don't need to close or resolve the thread. It's nice to have an answer selected as best, but it's not a big deal.

Although the G4560 will work in a 1xx chipset (such as H110), it's a new CPU and may not work without a BIOS update, which would require you have another CPU to use first. 2xx chipsets (such as B250) are guaranteed to work out of the box with it. You'll also get 4 RAM slots and some other goodies you might not find on an H110 board.

That's probably the least expensive, quality B250 board, and would work fine. If you have the option of getting one for just a few dollars more that has 4 RAM slots, I'd go for that though.

Depending on what part of Europe you're in, PCPartPicker might be able to find parts for you much more easily.