Graphics card upgrades
The most common upgrade in a performance machine, and the one most likely to be blocked by something other than the card.
Where the budget goes first
Physical clearance
Cards have grown. Many will not fit cases that were roomy a few years ago.
Power supply capacity and connectors
The most common reason an upgrade fails after purchase.
Case airflow
A card that overheats gives back the performance you paid for.
The card itself
Matched to the display, once the three above allow it.
Check the machine before the card
Three questions decide whether an upgrade is possible at all: will it physically fit, will the power supply drive it, and can the case keep it cool. Each has ended an upgrade that had already been paid for.
Measure the available length, check the power supply's capacity and the connectors it actually has, and consider whether the case moves enough air.
- Available length, width and slot count in the case
- Power supply capacity, with headroom rather than to the minimum
- The specific power connectors the card requires
- Whether case airflow can carry the extra heat
Match the card to the display
A card is specified against a resolution and refresh rate, not in the abstract. Fitting a card far beyond what the screen can show spends money on frames that never reach you.
If a display upgrade is also planned, decide that first — it changes the answer.
When the rest of the machine will not keep up
A modern card in a much older system can be limited by the rest of the machine, so the upgrade delivers less than expected. That is worth knowing before purchase rather than after, and it is one of the few cases where a partial rebuild is the better value.
What each choice costs elsewhere
| Choice | What it buys | What it costs |
|---|---|---|
| A larger card | Higher settings and resolution | Clearance, power and heat all become constraints |
| Upgrading the power supply too | Headroom for this card and the next | Adds to the cost of the upgrade |
Questions
Will a new card fit my computer?
Do I need a new power supply as well?
Next
Power-supply planning
Cooling and thermal planning
Custom gaming PCs
Check before you buy
Send us the machine and the card you are considering and we will confirm it fits.