What actually decides what an old desktop PC is worth

People judge an old computer by how old it looks, and that is the worst available guide. A five-year-old tower can be worth more than a two-year-old one sitting next to it, and the reason has nothing to do with the case. Here is what actually moves the figure, in the order it matters.

The graphics card, and why a desktop is different

On a desktop this is usually the largest single factor, and it is worth understanding why it matters so much more here than on a laptop.

In a gaming laptop the graphics chip is soldered to the motherboard. It cannot be separated from the machine, so it is worth what the whole laptop is worth and nothing on its own. In a tower it unscrews. That one difference means the part carrying most of the value is also the part that comes out — so a machine with a dead motherboard still has a graphics card in it, and an ageing tower with a good card can beat a newer office machine with none.

It also means it is worth looking. A great many people describe their machine without mentioning the card because they never knew it was there. Press Ctrl+Shift+Esc, open Performance, and it is listed as GPU down the left.

Processor generation, not processor name

“An i5” describes chips made a decade apart. The generation is the part that matters, and it is the number immediately after the i3/i5/i7 — an i5-12400 is a twelfth-generation chip, an i5-6500 is a sixth.

This is also where an office machine two generations newer can be worth less than a workstation two generations older, because they were built for different jobs. A machine that was specified for engineering work keeps being useful for engineering work long after an office tower has nothing anybody wants.

Memory and storage: what moves it and what does not

Memory moves the figure in steps rather than smoothly. The difference between 8GB and 16GB is real; the difference between 16GB and 20GB is mostly not, because nobody specifies 20.

Storage matters less than people expect, with one exception: whether the machine boots from a solid state drive or a mechanical one. That single fact changes how the machine feels to use more than almost anything else on this list, and it is a cheap thing to check — if it takes a minute to reach the desktop, it is mechanical.

Capacity itself is the least important number in this whole post. A large old mechanical drive adds very little.

What a workstation has that an office tower does not

Bigger power supplies, room for more drives, professional graphics, and processors from a different family altogether — Xeon and Threadripper rather than the ordinary desktop parts. Dell Precision, HP Z-series and Lenovo ThinkStation machines were built for CAD, rendering and engineering.

The practical consequence is that they hold value considerably longer than an office machine of the same age, because the things inside them stay useful for longer. If the case says Precision or Z, that is worth saying out loud rather than describing it as “an old Dell”.

What reduces the figure

• A missing drive. The commonest self-inflicted one. A machine with no drive is worth less than the same machine with the drive wiped, and wiping answers the same worry.
• A missing side panel, or missing screws, feet and brackets. Small things, but a machine that cannot be closed up is harder to move on.
• A dead power supply — though far less than people fear. It is a routine, cheap, well-understood fault and it leaves everything else untouched, which is why a desktop that will not start is in a much better position than a laptop in the same state.
• Being stripped before it was offered. A machine taken apart on the assumption it was worthless, then found not to be, is the hardest thing to put a figure on.

Whole machine, or in parts?

Parting it out usually returns more. What is worth weighing is what it costs to do: several separate listings rather than one, fees on each, packing a graphics card well enough to survive a courier, and the buyers who agree and then go quiet. Selling it whole is one conversation.

That is the trade, and it is yours to make. Either works — whole machines and loose components are both bought. The one thing worth deciding early is which, because a half-stripped machine that then does not sell is the worst of both.

Why there is no price list

Because everything above changes the answer, and two machines with the same model number on the front can be specified completely differently inside. A published figure would be right for one of them and wrong for the other, and you would find out which when the machine arrived. We would rather ask a few questions and give you something we can stand behind.

Selling an old computer is where to start, or Dell, HP and custom built machines if you know which you have. Selling a laptop instead? How much is my laptop worth walks through the same questions for portables.