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Deciding CPU or GPU first is the smartest upgrade question you can ask, because the wrong upgrade wastes money you will feel every time you play. Upgrade the part that is holding you back — and nothing else — and your games feel like new.
Here is how to test your system and pick the right upgrade.
Find the bottleneck first
Before you spend anything, find out which part is limiting you. Play your favourite game for ten minutes with a monitoring tool open: if your graphics card is running at 99% while your CPU sits at 60%, the GPU is the bottleneck and a new graphics card will help. If the CPU is pinned at 100% while the graphics card idles at 60%, the CPU is holding you back.
Our CPU bottleneck guide shows exactly how to test this, and our best CPU for esports guide shows how much the processor matters in competitive titles. Never buy blind — test first, then spend.
When to upgrade the CPU first
Upgrade the CPU when it is old, slow or holding back a strong graphics card. If you are playing at 1080p where the CPU matters most — our best CPU for 1080p gaming guide shows the chip rules here — a CPU upgrade changes everything. The Ryzen 5 9600X is the best mid-range pick, and our 9600X vs 14600K comparison shows it leading its class.
If your budget is tighter, the Ryzen 5 7600X and Core i5-12400F are the best cheap upgrades, and the Core i5-13400F is a fine step up. Our how much to spend guide helps you set a budget, and our CPU compatibility guide shows how to check your board before you buy.
When to upgrade the GPU first
Upgrade the GPU when the graphics card is at 99% and the CPU is coasting. That is the usual case at higher resolutions: our best CPU for 1440p gaming and best CPU for 4K gaming guides both show that the GPU does the heavy lifting as resolution climbs, so a faster graphics card is the whole upgrade there. Check your AMD vs Intel for esports guide for how refresh rate changes the answer, too.
That said, a new graphics card can also be wasted on an old CPU: if the CPU cannot prepare frames fast enough, even the fastest GPU will sit idle. The Ryzen 7 7800X3D and Ryzen 7 9800X3D are the strongest gaming chips there are, and our 7800X3D vs 9800X3D comparison shows them beating everything else for competitive play — buy one of these only if your GPU is already strong enough to use it.
A quick decision rule
- 1080p, competitive games, CPU at 100%: upgrade the CPU first
- 1440p or 4K, GPU at 99%: upgrade the GPU first
- Old CPU and old GPU: CPU first, because a new GPU is wasted on an old chip
- Always check your power supply and case before buying either part
Do not forget RAM, storage and power
A CPU or GPU upgrade can expose the next weakest part of your system. Sixteen gigabytes of RAM is the minimum for smooth gaming in 2026, and a slow hard drive will make even the fastest processor feel sluggish when games load. A weak power supply is worse still: a new graphics card that draws more power than your unit can deliver will crash under load, so check the wattage and the connectors before you buy. Our PC build guides show how the parts fit together, and how much to spend helps you balance the whole budget.
The bottom line
CPU or GPU first comes down to one test: whichever part is running at 100% is the one to upgrade. At 1080p and in esports, that is usually the CPU; at 1440p and 4K, it is usually the GPU. Test your system, spend your money on the bottleneck, and check our best CPU for gaming guide, gaming CPU picks and budget CPU picks before you buy.
