I'm planning to build a PC, but I'm not sure whether there's a smart order for buying the components. Should I start with the cheapest parts and work up to the most expensive, buy the expensive components first, or simply purchase parts whenever I have enough money? I'd also appreciate advice on whether it's better to buy everything close together so I can test the system while returns are still available.
4 Answers
Ideally, save up and buy most of the parts within a short period. That way you can assemble and test the computer while every component is still inside its return window. Buying separately can leave you stuck with a faulty part you can no longer return. Sales, bundles, and unusually good deals are reasonable exceptions.
If prices are rising, I’d prioritize the expensive components first since a price increase hurts more on a $700 part than on a $50 one. Still, set a total budget and choose the complete parts list before buying anything.
There isn’t one mandatory order. Buy discounted parts when the deal is genuinely good, but avoid letting individual components sit for months. Check current prices for a complete build first, since a prebuilt system can sometimes cost less than buying all the parts separately.
For a basic test setup, you can install the CPU and RAM on the motherboard, connect the power supply, and briefly bridge the power-switch pins to see whether it reaches POST. This can help catch a bad motherboard or another major issue early. I’d generally leave the graphics card until last, especially if the processor has integrated graphics.

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