PCPartPicker Part List
CPU: AMD Ryzen 5 7600X 4.7 GHz 6-Core Processor ($239.99 @ Amazon)
CPU Cooler: ARCTIC Liquid Freezer II 240 A-RGB 48.8 CFM Liquid CPU Cooler ($109.99 @ Amazon)
Motherboard: Gigabyte A620M GAMING X Micro ATX AM5 Motherboard ($99.99 @ Newegg)
Memory: Corsair Vengeance 16 GB (2 x 8 GB) DDR5-5200 CL40 Memory ($69.99 @ Newegg)
Storage: Samsung 840 Evo 120 GB 2.5" Solid State Drive
Storage: Seagate BarraCuda 2 TB 3.5" 7200 RPM Internal Hard Drive ($89.00 @ Amazon)
Video Card: MSI GAMING X GeForce RTX 3050 8GB 8 GB Video Card ($229.99 @ B&H)
Case: BitFenix Phenom M Nvidia Edition MicroATX Mini Tower Case
Power Supply: Corsair CX850M 850 W 80+ Bronze Certified Semi-modular ATX Power Supply
Operating System: Microsoft Windows 10 Home OEM - DVD 64-bit
Total: $838.95
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2023-08-15 11:56 EDT-0400
Something like this would be enough for modern day gaming, and for a couple of years really.
7600X is a great 6 core/12 thread CPU that will not let you down in any game you play.
I put an AIO in this build since I do not know how well a Air cooler will perform in such a tiny space. Mount it on the top.
2x8GB will be perfect if your main task is gaming, the motherboard also has two more DIMM slots, if you need to upgrade the RAM down the line.
The motherboard is a classic Micro-ATX board. One PCI-e x16 slot for your GPU, a few expansion features, but what's really good about it is that it has 4 DIMM (ram) slots, which will be useful down the line.
I would keep you current storage configuration, as you said, and the case.
RTX 3050 will handle pretty much any game you throw it at 1080p resolution, at max settings, currently, that is. In the future you might have to lower the settings. A possible RTX 3060 12GB is possible, but you would have to sacrifice the CPU and possibly the AIO, in my build, that is.
I would keep the PSU, RTX 3050 is not power hungry.
Who knows, maybe something new comes out, be it a GPU or a CPU, so prices might fall down, so you can get even better parts.
This is just an idea