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CPU Comparison: FPS, Specs & Value

Xeon E5-2666 v3 vs Core i7-5775R

The Xeon E5-2666 v3 is slightly slower than the Core i7-5775R on average across 100+ games. We cannot compare value as at least one CPU is out of stock.

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Up to 8% faster on average across 100+ games
Is 6 months newer
Available for $384

FPS Comparison Across Popular Games

Predicted average FPS at 1080p, 1440p, and 4K, based on real game benchmarks.

Resolution

Quality

Paired GPU

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Overwatch 22023

Xeon E5-2666 v3

517FPS

Core i7-5775R

518FPS

League of Legends2009

Xeon E5-2666 v3

191FPS

Core i7-5775R

204FPS

Fortnite2017

Xeon E5-2666 v3

325FPS

Core i7-5775R

326FPS

Grand Theft Auto V2013

Xeon E5-2666 v3

200FPS

Core i7-5775R

202FPS

Minecraft2011

Xeon E5-2666 v3

600FPS

Core i7-5775R

609FPS

Valorant2020

572FPS

581FPS

496FPS

515FPS

Destiny 22017

Xeon E5-2666 v3

590FPS

Core i7-5775R

592FPS

Specs & Benchmark Comparison

Side-by-side specs, synthetic benchmarks, and key hardware differences.

Scorehelp

Xeon E5-2666 v3

30%

Core i7-5775R

24%

Xeon E5-2666 v3 ranks 6 points higher.

Coreshelp

Xeon E5-2666 v3

Core i7-5775R

Xeon E5-2666 v3 has 6 more cores.

Threadshelp

Xeon E5-2666 v3

Core i7-5775R

Xeon E5-2666 v3 has 12 more threads.

L3 Cachehelp

Xeon E5-2666 v3

25 MB

Core i7-5775R

6 MB

Xeon E5-2666 v3 has 19 MB more L3 cache.

Base Frequencyhelp

Xeon E5-2666 v3

2.9 GHz

Core i7-5775R

3.3 GHz

Core i7-5775R has a 14% higher base clock.

Turbo Frequencyhelp

Xeon E5-2666 v3

3.5 GHz

Core i7-5775R

3.8 GHz

Core i7-5775R boosts 9% higher.

TDPhelp

Xeon E5-2666 v3

135W

Core i7-5775R

65W

Core i7-5775R draws 70W less power.

Pricehelp

Xeon E5-2666 v3

Core i7-5775R

Xeon E5-2666 v3Core i7-5775R

LGA2011-3

Sockethelp

Intel BGA 1364

Haswell-EP

Codenamehelp

Broadwell

Server/Workstation

Segmenthelp

Desktop

No Integrated Graphics

Integrated GPUhelp

Iris Pro Graphics 6200

2133 MHz (DDR3), 2133 MHz (DDR4)

RAMhelp

1866 MHz (DDR3)

Not Overclockable

Overclock Supporthelp

Not Overclockable

Frequently Asked Questions

compare_arrowsWhich is better, Xeon E5-2666 v3 or Core i7-5775R?expand_more

The Core i7-5775R. It's 25% faster than the Xeon E5-2666 v3 on average across 100+ games, scoring 24/100 vs 30/100 in our gaming rating.

speedHow much faster is Core i7-5775R than Xeon E5-2666 v3?expand_more

25% faster on average. The gap varies by game and resolution, check the per-game FPS comparison above.

aspect_ratioWhich is better for 1440p and 4K gaming, Xeon E5-2666 v3 or Core i7-5775R?expand_more

The Core i7-5775R is faster at both resolutions. Toggle the resolution selector above to see per-game FPS.

paidIs the Core i7-5775R worth buying in 2026?expand_more

It scores 24/100 in our gaming rating, faster than most CPUs on the market. Good buy if the price is right.

differenceWhat is the difference between Xeon E5-2666 v3 and Core i7-5775R?expand_more

Performance: Xeon E5-2666 v3 scores 30/100, Core i7-5775R scores 24/100. They also differ in core count, clock speeds, L3 cache, and power draw. Full breakdown in the specs section above.

compressWill the Xeon E5-2666 v3 or Core i7-5775R bottleneck my PC?expand_more

Depends on the rest of your build, especially your GPU. Swap the paired GPU in the FPS section above to see if it limits performance, or use our bottleneck calculator for a full analysis.

upgradeIs it worth upgrading to the Xeon E5-2666 v3 or Core i7-5775R?expand_more

The Core i7-5775R is the stronger pick at 24/100. Compare your current CPU against it to see the exact FPS gain across 100+ games.