FaTaLMercenery

@FaTaLMercenery I see a couple of red flags in your build. Streaming with 16GB of RAM is one, and streaming with a 6 core cpu is another. The frame rates are going to take a beating no matter what if you're streaming from the same PC that you're gaming on hence the reason I would seriously look at 1080P if you play first person shooter games. You want 32GB of RAM and more cores.  Use Nvidia's NVENC with OBS for a decent streaming experience.  Here's a case with better airflow (2x140mm intake fans + 1x120mm exhaust fan), an i7 cpu, faster SSD and 32GB of RAM. 
 
https://www.nvidia.com/en-us/geforce/broadcasting/  
 
https://www.nvidia.com/en-us/geforce/guides/broadcasting-guide/ 
 
PCPartPicker Part List
CPU: *Intel Core i7-13700F 2.1 GHz 16-Core Processor  ($329.99 @ Amazon) 
CPU Cooler: *Deepcool AG620 67.88 CFM CPU Cooler  ($48.98 @ Newegg) 
Motherboard: *MSI B760 GAMING PLUS WIFI ATX LGA1700 Motherboard  ($164.99 @ Amazon) 
Memory: *Corsair Vengeance 32 GB (2 x 16 GB) DDR5-6000 CL36 Memory  ($95.99 @ Newegg) 
Storage: *Western Digital Black SN770 2 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive  ($109.99 @ Newegg) 
Storage: *Seagate Barracuda Compute 2 TB 3.5" 7200 RPM Internal Hard Drive  ($49.99 @ Amazon) 
Video Card: *MSI VENTUS 3X OC GeForce RTX 4070 12 GB Video Card  ($599.99 @ Newegg) 
Case: *Fractal Design Focus 2 ATX Mid Tower Case  ($60.98 @ Newegg) 
Power Supply: *FSP Group Hydro G Pro 750 W 80+ Gold Certified Fully Modular ATX Power Supply  ($85.99 @ Newegg Sellers) 
Operating System: *Microsoft Windows 11 Home OEM - DVD 64-bit  ($99.99 @ Newegg) 
Case Fan: *ARCTIC P12 PST 56.3 CFM 120 mm Fan  ($9.65 @ Amazon) 
Monitor: *Gigabyte G24F 2 23.8" 1920 x 1080 180 Hz Monitor  ($149.99 @ Newegg) 
Keyboard: *Logitech G610 Wired Gaming Keyboard  ($60.99 @ Amazon) 
Mouse: *Razer DeathAdder V3  Optical Mouse  ($64.99 @ Newegg) 
Headphones: *SteelSeries Arctis Prime  Headset  ($49.99 @ Amazon) 
Total: $1982.49
Prices include shipping, taxes, and discounts when available
*Lowest price parts chosen from parametric criteria
Generated by PCPartPicker 2023-06-08 23:44 EDT-0400 
 
Optional cpu.
https://pcpartpicker.com/product/YDM48d/intel-core-i7-12700kf-36-ghz-8-core-processor-bx8071512700kf 
Intel Core i7-12700KF $239.99  
 
https://www.intel.com/content/www/us/en/products/sku/134595/intel-core-i712700kf-processor-25m-cache-up-to-5-00-ghz/specifications.html  
 
Optional monitor.
https://pcpartpicker.com/product/Tqqrxr/lenovo-g24-20-238-1920-x-1080-165-hz-monitor-66cfgcc1us  
Lenovo G24-20 23.8" 1920x1080 165Hz Monitor $139.99  
 
https://www.lenovo.com/us/en/p/accessories-and-software/monitors/gaming/66cfgcc1us 
 
A better look at those components. 
https://www.gigabyte.com/Monitor/G24F-2#kf
 
https://www.fractal-design.com/products/cases/focus/focus-2/white-tg-clear-tint/
 
https://www.msi.com/Motherboard/B760-GAMING-PLUS-WIFI  
 
https://www.intel.com/content/www/us/en/products/sku/230491/intel-core-i713700f-processor-30m-cache-up-to-5-20-ghz/specifications.html   
 
https://www.deepcool.com/products/Cooling/cpuaircoolers/GAMMAXX-AG620-Dual-Tower-CPU-Cooler-1700-AM5/2022/15900.shtml      
 
https://www.techpowerup.com/review/wd-black-sn770-1-tb/  
 
https://www.msi.com/Graphics-Card/GeForce-RTX-4070-VENTUS-3X-12G-OC   
 

I appreciate all of your input.
 
@SorryClaire
2x monitors are something he specifically requested for his setup since he plans to do streaming(have the game open on one monitor and discord/obs/whatever else on the other) and also work(he's an accountant). I will ask him about in-ear, but I am going to assume he would prefer over-ear headphones. Assuming TKL means tenkeyless, that is also not optional since it is important for his work. I assume he will probably be using OBS.
 
@Somerandomtechyboi
I personally am very against second-hand stuff, especially electronics, but I will ask my friend if he is ok with it though. I also see that you selected DDR4, is there any reason for that other than to bring the cost down? Will that impact performance in any significant way? Also, I don't know the PSU brand, FSP Group; is that a reputable brand?
 
@Why_Me
I appreciate the thoroughness of your response and I do like the part list you made, I just have some questions.
In the Average FPS chart, it shows the RTX 4070 and the Radeon 6800 XT to be basically equal, does the NVENC encoder really warrant the extra $100(I have zero personal experience recording/streaming)? I don't know the PSU brand, FSP Group; is that a reputable brand? Is there any significant performance difference between the 12700KF and 13700F? If you had to choose between the 13700F + 6800XT vs 12700KF + 4070, which would you recommend?  
I see in your list you only have one monitor, so I need to factor in the additional cost for that, but I found a 1080p Acer monitor that is $120 which should still work for him. I am going to get them through Amazon and tell him that if he ends up wanting a bigger or higher-resolution monitor, he can return it and get something better.
 
Here is the updated list: https://pcpartpicker.com/list/WWyQFg

Budget (including currency): ~$2000USD
Country: US
Games, programs or workloads that it will be used for: Going to be used for work(nothing very intensive) and streaming games(Fortnite, Call of Duty, other AAA games)
Other details (existing parts lists, whether any peripherals are needed, what you're upgrading from, when you're going to buy, what resolution and refresh rate you want to play at, etc): 
 
This build is 100% from scratch, meaning it needs to include peripherals(2x monitors, mouse, keyboard, headset).
 
PCPartPicker Part List: https://pcpartpicker.com/list/WrZ9sL
CPU: AMD Ryzen 5 7600 3.8 GHz 6-Core Processor  ($219.99 @ Amazon) 
Motherboard: Gigabyte B650 GAMING X AX ATX AM5 Motherboard  ($179.99 @ Newegg) 
Memory: Kingston FURY Beast 16 GB (2 x 8 GB) DDR5-6000 CL36 Memory  ($81.98 @ Amazon) 
Storage: Crucial P3 Plus 2 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive  ($104.99 @ Amazon) 
Storage: Seagate Barracuda Compute 2 TB 3.5" 7200 RPM Internal Hard Drive  ($49.99 @ Amazon) 
Video Card: ASRock Phantom Gaming D OC Radeon RX 6800 XT 16 GB Video Card  ($499.99 @ Newegg) 
Case: Corsair 4000D Airflow ATX Mid Tower Case  ($94.99 @ Amazon) 
Power Supply: Corsair RM750e (2023) 750 W 80+ Gold Certified Fully Modular ATX Power Supply  ($99.99 @ Best Buy) 
Operating System: Microsoft Windows 11 Home Retail - USB 64-bit  ($138.98 @ Newegg) 
Monitor: Asus TUF Gaming VG27AQA1A 27.0" 2560 x 1440 170 Hz Monitor  ($199.99 @ Newegg) 
Monitor: Asus TUF Gaming VG27AQA1A 27.0" 2560 x 1440 170 Hz Monitor  ($199.99 @ Newegg) 
Keyboard: Logitech G610 Wired Gaming Keyboard  ($60.99 @ Amazon) 
Mouse: Razer DeathAdder V3  Optical Mouse  ($64.99 @ Newegg) 
Headphones: SteelSeries Arctis Prime  Headset  ($49.99 @ Amazon) 
Total: $2046.84
 
The build is for a friend and I am willing to go Intel, I just have more knowledge/experience with AMD CPUs. For the monitors, since he will also be using it to do accounting work, I figured larger monitors would be better, and 1080p wouldn't look great at that screen size. Those were the cheapest 1440p monitors I could find over 120Hz.
 
Just need opinions on possible alternative components or if this is a good build.

My RAM was actually running at 2133 MHz and a low voltage, I think it was around 1.23V so I changed it to the rated 3200 MHz and 1.35V.
I noticed that in my project, if I am working on the blueprints my RAM usage doesn't increase, at least not drastically. Same for when I actually press play for the game. It starts increasing rapidly when I am just looking at the level. I don't have to do anything, simply looking at the level seems to cause my RAM usage to soar. The RAM usage by UE4 also does not change at all when I am focused on another application. Here are some numbers for RAM usage as I "work" with the percent total usage and how much UE4 is using:
 
Launch: 31%   700MB
Level:  38%   3,200MB (approx. 10 seconds
Blueprint: 39%   3,400MB (after switching from level view)
Level: 44% 4,800MB (approx. 20 seconds)
 
Just for fun: 97% 20,000MB (approx. 10 minutes and was still increasing)
 
 
You can see UE4 RAM usage not changing until I tab into it at which point it rises around 800MB by the end of the short video. 

2020-03-31 21-19-17.mp4

Thank you, I did not notice this.
This could be an option. I've been following a tutorial on YouTube for creating a grid and using A* path-finding but he speaks all in French so I can't understand him and don't really know if he addressed this issue. I did notice that in the latest video I watched his game did seem to get laggy, so hopefully within the next video or two he does something to fix this error if this actually is the cause.