Prebuilt vs Custom PC: How to Compare the Real Cost

1. Identify the exact components

Write down the specification of every part. Model and variant matter: two graphics cards with the same name can differ in cooling, power draw and price.

• CPU: the exact model, e.g. Ryzen 7 7800X3D, not just "Ryzen 7".
• Graphics card: chip, amount of VRAM, and ideally the manufacturer and model.
• Motherboard: chipset and form factor. The chipset decides overclocking, M.2 slots and upgrade options.
• RAM: capacity, number of modules, type and speed, e.g. 32 GB (2 × 16 GB) DDR5-6000.
• SSD: capacity and type. An NVMe drive and a SATA drive are not the same purchase.
• Power supply: wattage, efficiency rating, and ideally the manufacturer and model.
• Case and cooler: airflow, space and noise affect both temperatures and lifespan.

2. Use delivered prices

Compare what you actually pay once the goods arrive.

• Add shipping to every part. Buying from several retailers often means paying shipping several times.
• Use current prices from the same day. Component prices change often.
• Check that parts are in stock. A low price on a part that can't be delivered doesn't help.
• Only count the parts you actually need. If you already own an SSD or a Windows licence, leave them out.

3. The value of what's included

A prebuilt is more than the sum of its parts. Decide what these are worth to you.

• Assembly and testing: the retailer builds, updates and tests the machine.
• Operating system: a Windows licence is often included. Check whether it is a full licence.
• Warranty: one retailer covers the whole machine. If you build it yourself, you claim on each part separately.
• Time and risk: building takes time, and assembly mistakes are your responsibility.

4. Upgradeability and proprietary parts

Some prebuilts use parts that are hard to replace later.

• Proprietary motherboards, power supplies or cases can limit future upgrades.
• A small power supply can rule out a more powerful graphics card later.
• Few RAM or M.2 slots limit expansion.
• Standard ATX parts are the easiest to upgrade and resell.

5. Missing or unspecified details

Many product pages only list the CPU, GPU, RAM and SSD. The rest is often described as a "quality part" or left out.

• If the motherboard, power supply or cooler isn't named, you can't compare the price fairly.
• Ask the retailer for exact models before you buy.
• Don't assume an unknown part matches the cheapest or the most expensive variant.

When a prebuilt can be good value

• When every part is specified and the delivered price is close to, or below, the cost of the same parts.
• When you value assembly, Windows and a single warranty.
• When graphics cards or other parts are hard to buy separately.
• When you would rather spend the time gaming than building.

When building it yourself makes more sense

• When you want to choose every part, especially the power supply, cooler and case.
• When you already have parts you can reuse.
• When you want to upgrade with standard parts later.
• When the prebuilt doesn't list all of its components.

Checklist before you buy

1. Find the prebuilt's full specification and delivered price.
2. Find the same or equivalent parts and their delivered prices.
3. Subtract the parts you already own.
4. Weigh the value of assembly, Windows and warranty.
5. Check the power supply, cooling and upgrade options.

How RigRoute helps

RigRoute Market collects products and retailer offers from Danish shops, including prebuilt PCs. With the PC configurator you can put together a compatible custom PC with current prices. We don't show an automatic saving between a prebuilt and the same parts, because we don't yet have complete data for every prebuilt model.