I just want to say is that, for pretty much anything other than heavy single to dual-threaded tasks (like Dolphin), a Ryzen 3200G or 3400G by itself without a discrete GPU and paired with some decently fast dual-channel RAM (which is quite cheap nowadays) tends to be a wiser investment, and even in Dolphin they tend to still perform well enough for 99% of people.
A 3200G will be cheaper with considerably stronger multi-threaded CPU performance which is ideal for native PC games or emulators for stronger consoles (like PCSX3 and the like) while not being that much slower in GPU performance (especially in newer APIs like Vulkan), while a 3400G for a similar if not slightly cheaper price will have much stronger multi-threaded CPU performance as well as even closer-to-GT1030 GPU performance. Both the Ryzens also support AVX unlike the Pentium which may be useful in some more modern emulators. Do keep in mind however that the 3200G and 3400G use the older Zen+ architecture found in 6+ core Ryzen 2000 processors, not the new Zen2 architecture used by the rest of the Ryzen 3000 family.
There's also the niggle that the GT 1030 DDR4 exists which is much slower than the GDDR5 version to the point of being more on-level with Intel integrated graphics or a Ryzen APU with single-channel RAM (rather than dual-channel), so going with a Ryzen APU also avoids that issue altogether. Additionally there's some newer performance investigations pointing to surprisingly poor Vulkan performance on the GT 1030 (even on the GDDR5 model) to the point of the Ryzen APUs having like twice the GPU performance, and Vulkan is quite important for modern more demanding emulators.
Besides, getting a Ryzen APU means you can get a truly console-like form factor with something like the ASRock DeskMini A300 (do note that it was originally designed for the 2200G and 2400G instead, so it might not have the BIOS support for the 3200G and 3400G at this time). And if money is no object and maximizing performance for all tasks is all you care about, then instead go for an Intel Hade's Canyon NUC aka the "NUC8i7HVK" (the product page does a poor job of explaining the CPU but it's basically a soldered Kaby Lake i7 paired with the Vega embedded discrete GPU equivalent of an RX 470).
The single niggle in all of this is that AMD's OpenGL driver stack on Windows isn't designed for performance with all the extensions and stuff that Nvidia uses but rather for plain old vanilla spec-compliance, though it is worth nothing however that the AMD OpenGL driver and performance on Linux is a bajillion times better, not to mention it "just works" out-of-the-box right when you install the OS. In general you'll get better emulation performance in Linux anyway, and as a side benefit I've found it's also way easier to get the official Nintendo GameCube USB adapter to work with Dolphin on Linux than on Windows.
A 3200G will be cheaper with considerably stronger multi-threaded CPU performance which is ideal for native PC games or emulators for stronger consoles (like PCSX3 and the like) while not being that much slower in GPU performance (especially in newer APIs like Vulkan), while a 3400G for a similar if not slightly cheaper price will have much stronger multi-threaded CPU performance as well as even closer-to-GT1030 GPU performance. Both the Ryzens also support AVX unlike the Pentium which may be useful in some more modern emulators. Do keep in mind however that the 3200G and 3400G use the older Zen+ architecture found in 6+ core Ryzen 2000 processors, not the new Zen2 architecture used by the rest of the Ryzen 3000 family.
There's also the niggle that the GT 1030 DDR4 exists which is much slower than the GDDR5 version to the point of being more on-level with Intel integrated graphics or a Ryzen APU with single-channel RAM (rather than dual-channel), so going with a Ryzen APU also avoids that issue altogether. Additionally there's some newer performance investigations pointing to surprisingly poor Vulkan performance on the GT 1030 (even on the GDDR5 model) to the point of the Ryzen APUs having like twice the GPU performance, and Vulkan is quite important for modern more demanding emulators.
Besides, getting a Ryzen APU means you can get a truly console-like form factor with something like the ASRock DeskMini A300 (do note that it was originally designed for the 2200G and 2400G instead, so it might not have the BIOS support for the 3200G and 3400G at this time). And if money is no object and maximizing performance for all tasks is all you care about, then instead go for an Intel Hade's Canyon NUC aka the "NUC8i7HVK" (the product page does a poor job of explaining the CPU but it's basically a soldered Kaby Lake i7 paired with the Vega embedded discrete GPU equivalent of an RX 470).
The single niggle in all of this is that AMD's OpenGL driver stack on Windows isn't designed for performance with all the extensions and stuff that Nvidia uses but rather for plain old vanilla spec-compliance, though it is worth nothing however that the AMD OpenGL driver and performance on Linux is a bajillion times better, not to mention it "just works" out-of-the-box right when you install the OS. In general you'll get better emulation performance in Linux anyway, and as a side benefit I've found it's also way easier to get the official Nintendo GameCube USB adapter to work with Dolphin on Linux than on Windows.
Dolphin 5.0 CPU benchmark
CPU: Pentium G3258 @ 4.5GHz 1.24v
GPU: Intel integrated
RAM: 4x4GB Corsair Vengence @ DDR3-1600
OS: Linux Mint of some variety + [VM] Win7 SP1 x64
CPU: Pentium G3258 @ 4.5GHz 1.24v
GPU: Intel integrated
RAM: 4x4GB Corsair Vengence @ DDR3-1600
OS: Linux Mint of some variety + [VM] Win7 SP1 x64