* Microprocessor: $50-$500
* Memory (RAM): $50-$500
* Storage (hard drive or SSD): $50-$500
* Motherboard: $50-$500
* Power supply: $50-$200
* Cooling system (heatsink, fan, or liquid cooling system): $50-$200
* Breadboard or PCB: $20-$100
* Jumper wires and other components: $20-$100
Again, these are rough estimates, and the actual cost can vary depending on the specific components you choose and the quantity you need. Additionally, building a CPU from scratch requires a significant amount of time and effort, so you'll need to factor in the cost of your time and any additional tools or equipment you might need.
In summary, building a CPU from scratch is a challenging and time-consuming project that requires a significant investment of time, money, and expertise. While it can be a rewarding experience for those who are passionate about computer hardware and engineering, it's not a project for everyone. If you're looking to build a computer, it's often more practical and cost-effective to buy a pre-built system or to work with a professional builder.