191x7

You won't go wrong with a 7800XT, 6950XT, 7900GRE or a 7900XT. Or the RTX 4070 Ti Super 16GB.

What's the rest of your system?

Get the 5700X3D. You'll be able to power even a stronger GPU if needed.

Which GPU do you have and which resolution do you play at? A 5700X3D might be a bit easier on the motherboard.

5700X3D or 5800X3D Radeon 7900XT or RTX 4070 Ti Super A 800-1000W Quality PSU Keep the rest, and you don't actually need anything more. Maybe upgrading your peripherals, audio, TV?

HDR monitor?

Yes.

I would avoid a Gigabyte GPU, their recent generations have issues with a weak PCB near the PCI-E socket, they tend to develop cracks and Gigabyte does not accept those as valid warranty claims.

I had to switch from a 5900X to a 5800X3D to stop the CPU bottlenecking the 6950XT in PUBG on 1440p.

I'll configure you something. Which games do you play the most? If I optimize the build for 1440p, how long will it be till you get a 1440p monitor? Quite a good system for a 1080p high refresh, well capable of 1080p 144Hz+. I would reconfigure it to better match 1440p gaming - a Ryzen 7500F or 7700, 6000 MHz RAM, a $50 AIR cooler like a Pearless Assassin 120 and a Radeon RX 7800XT or 7900 GRE.

Most people would find 200/20 way better than 100/100. For most, the download speed is the main need. You need more than 100 of upload only if you backup a lot of storage to the Cloud.

If you've been using a 3400G for so long, just add more RAM and upgrade to a 5700X. You'll be amazed how huge of an upgrade it will make. Then save up some more money and upgrade to a next-generation AM5 platform with a Ryzen 9700X or similar.

I would not upgrade to a Ryzen 5900X, not on that X370 board with weak VRM-s. It's the warmest and most power-hungry AM4 CPU. In your place, I would either swap to a 5700X, a 5700X3D/5800X3D, or upgrade to a completely new platform. The 5900X is, at this time, a failed purchase since the 5950X is stronger for work while the 5700X, 5800X, 5700X3D and 5800X3D are way better for gaming and such tasks. With a 5700X you get double the cores of a 3400G, the cores are a lot stronger and it supports faster RAM. It's a huge upgrade.

Did you peel the sticker off the cooler base?

Your temperatures should be lower with a cooler like that. How old is your thermal paste? Is the cooler clean? Are the fans in push-pull? Tried reapplying the thermal paste? Latest motherboard Bios? Tried a negative PBO offset of 15 to 20?

AMD also has AntiLag and AntiLag+ but limiting the framerate without having a CPU bottleneck causing stutters is still the best option.

You can try turning XMP back on and downclocking the RAM to 3000 or 2933. Having the RAM on stock JEDEC 2133/2400 limits your Ryzen a lot.

There are two things you should try. 1st - disable the fast startup / hybrid sleep in Windows (or just disable Hibernation) 2nd - try to locate a vBios update for your GPU.

Update your Bios to the latest. Retest. Then get those: -a Ryzen 5700X -a cpu cooler better than the one that comes with the 2600

Go and read my comment again.

Yes you should be fine. The P12 Max do not have the PST so you can't chain them without using a fan splitter/adapter.

Might be a long shot but... Have you installed the drivers for your monitors? Are your GPU drivers up to date? Checked the other drivers with something like Iobit Driver Booster? I mentioned the RAM frequency because of the RAM clocks the Zen+ architecture supports. I was going to recommend Latencymon but you already beat me to it. Does the same happen when one of the displays is connected to the motherboard (using the GPU integrated in the CPU)? Do you have the APU drivers installed too?

3.3V is brand new, 3V is standard. 2.8V or lower means dead.

There are Arctic P fans with "PST" which allows you to use multiple fans on a single header. For example, the ones in the picture use 0.1A of current meaning a 1A motherboard header could, in theory, run 10 of those. But 0.1A sounds too low to me, most 120mm fans are 0.25A to 0.35A so I would not put more than 3 on a single 1A header. But some motherboards have 2A headers.

Arctic Cooling P12, P12 Max, P14 and P14 Max.