Idk, but I’ll tell you Dell and HP desktops are the opposite of the Thinkpad. Every part they can make proprietary, they do make proprietary.

• Case
• Motherboard
• Power Supply
• CPU Cooler

Cannot be upgraded or replaced with off the shelf parts.

If your system dies, you’re expected to just buy a new one and chuck the old one in the bin.

Any PC you build yourself?

Aside from building your own PC ofc.

Are you talking about a pre-built PC that has decent repairability? If so you'd really just want to avoid brands that use proprietary or irregular parts. For example Dell Optiplex computers can be bought cheap but they use their own power supply and some have smaller cases that might not fit most graphics gards.

Is there any reason you are posting this to a privacy community? Were you hoping for something that is Libre/Core boot compatible like some ThinkPads are?

The Thinkpad

By PC do you mean a desktop? Guess any desktop you build yourself. Are there features you want like the best Linux support or something?

Framework is the best option these days for upgrades and repairs

Are you looking for a laptop or a desktop machine?
Framework laptops seems kinda cool but they don't ship to me yet so I have no personal experience. https://frame.work/
Many computer stores offer to build your computer from parts for a fee, that would give you the custom PC without building yourself.

Framework

I recommend NOT getting a PC in a fancy thin case. Had to cut a hole when upgrading.

If you're interested, the Dell T1650 is currently supported by Libreboot. I use it for everything; it has a Xeon E3 1275 V2, 32GB DDR3L ECC RAM, NVIDIA 2080 SUPER, 2x4TB HDD (RAID 1), 1TB NVMe M.2 (PCIe x4 adapter needed), and a 700W PSU (EVGA 700BR). It handles all my games, and I use Proxmox VE as my host, allowing me to create virtual machines where I can passthrough my GPU and use anything proprietary in the VM. Even the GPU drivers can be passed through (no need to install on the host), so essentially, I'm running 100% free software on my host.

Obviously, nothing can be 100% FOSS in the hardware (proprietary ECs, proprietary CPU microcode, proprietary storage firmware, etc.), BUT you can free the BIOS. There is currently a blob needed for the PCIe x16 slot, but it can be reverse-engineered in the future – not sure if there is anything else; I'll have to ask. There is one board coming soon that I know can be made blobless in the BIOS, and that is the Dell Optiplex 9020 MT. It's a Haswell board capable of using an i7 4790K with AVX2 instructions. I'm actually the first person to use this board, as I'm the one who made the port along with some help from the Libreboot team. The board is currently in its testing phase still, but soon in the next couple weeks we will make it freely availble.

This is super cheap hardware; you can find the whole PC on eBay for like $50-$60, or you can just buy the motherboard for like $15-$25. I bought only the motherboard because I'm using it in my gaming computer case. Also, you don't even need any fancy flashing equipment, all you need is a insulated screwdriver to short one of the SERVICE_MODE pins on the motherboard to unlock the BIOS chip, which then allows you to flash Libreboot through your OS. Libreboot is more secure than any non-free BIOS/UEFI. At least with Libreboot, you can have transparency, and you get new updates with better features coming out.

For example, Libreboot supported Argon2 encryption in GRUB for fully encrypting your storage drive. This allows you to encrypt the /boot partition and fully encrypt your disk with ease when installing a fresh operating system. Also, you can run Windows on the host with Libreboot, it is supported but not officially. I highly recommend Libreboot, as you can tell.

Honestly, any enterprise OEM will be similar, such as Dell or Lenovo. Yes, their mainboards are proprietary, but you can easily source them from legitimate parts vendors. That's why there are so many refurbished Optiplexes and ThinkCentres on Amazon. They're trivial to repair and most don't even require tools.

You cannot easily upgrade to a dedicated GPU unless replacing an existing unit, which is standard for laptops as well.

Framework

This tread is full of random comments about framework, when the op clearly asked about PCs

System76. 3mdeb.com also sells corebooted Desktops which are using MSI motherboards, brobably well repairable too.

I don't have a recommendation but I can point you to Gamers Nexus YouTube channel / website and filter on prebuilts to see reviews.

Big names like Dell HP and Lenovo are bad for ability to repair/upgrade. Although I do love buying their old servers because there are so many cheap ones on eBay.

Framework.

But if you are really opposed to that option for whatever reason, you can maybe take a look at iFixit's repair scores.

Tuxedo