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Best CPU for the GeForce RTX 3090 Ti

Processors that keep up with this card at each resolution.

At 1080p

  1. Core i5-12600K $289 · GPU holds it back 9.5%
  2. Ryzen 9 5950X $799 · GPU holds it back 9.5%
  3. Ryzen 7 5800X $449 · GPU holds it back 9.5%
  4. Core i5-13600 n/a · GPU holds it back 7.3%

At 1440p

  1. Core i5-10600K $262 · GPU holds it back 9.3%
  2. Core i3-13100F $109 · GPU holds it back 7.5%
  3. Ryzen 5 5500 $159 · GPU holds it back 7.5%
  4. Ryzen 7 3700X $329 · GPU holds it back 7.5%

At 4K

  1. Core i5-10300H n/a · GPU holds it back 9.5%
  2. Core i3-9100F $79 · GPU holds it back 9.5%
  3. Ryzen 5 3400G $149 · GPU holds it back 9.5%
  4. Core i3-9100 $122 · GPU holds it back 9.5%

Picks keep the CPU and GPU within 10% of each other. Prices are launch prices, not today’s shelf prices.

Processors for the GeForce RTX 3090 Ti at each resolution

At 1080p the cheapest processor that keeps the GeForce RTX 3090 Ti within 10 percent is the Core i5-12600K (launch price $289), with a gaming index of 66 on the LGA1700 socket. Next in the list is the Ryzen 9 5950X, which is still 9.5% short.

At 1440p the cheapest processor that keeps the GeForce RTX 3090 Ti within 10 percent is the Core i5-10600K (launch price $262), with a gaming index of 49 on the LGA1200 socket. Next in the list is the Core i3-13100F, which is still 7.5% short.

At 4K the cheapest processor that keeps the GeForce RTX 3090 Ti within 10 percent is the Core i5-10300H, with a gaming index of 30. Next in the list is the Core i3-9100F, which is still 9.5% short.

What it costs and what it fits

Moving from 1080p to 4K changes what you need. The cheapest balanced chip at 1080p has an index of 66; at 4K the Core i5-10300H at 30 is enough.

For reference, the fastest chip we track, the Ryzen 7 9800X3D (index 100), is 27.1% faster than the GeForce RTX 3090 Ti needs at 1080p.

The picks sit on AM4 (5), LGA1700 (3), LGA1151 (2), LGA1200 (1) and BGA (1) sockets, released between 2019 and 2026.

Questions

What is the best CPU for the GeForce RTX 3090 Ti?

At 1080p, a processor like the Core i5-12600K is enough to avoid a CPU bottleneck above 10%. Faster is fine but gives little extra in games with this card.

What is the cheapest CPU for the GeForce RTX 3090 Ti at 1440p?

The Core i5-10600K (index 49, launch price $262) is the cheapest chip in our list that keeps the card within 10 percent at 1440p.

Updated October 3, 2026