IntelBX80646I74771
IntelBX80662I56400

4 Cores, 8 Threads @3.5GHz, Haswell.
Release date: Q2 2013.

4 Cores, 4 Threads @2.7GHz, Skylake.
Release date: Q3 2015.

Real World Speed
Performance profile from 160,374 user samples
10,138 User Benchmarks
Best Bench: 85% Base clock 3.5 GHz, turbo 3.9 GHz (avg)
Worst Bench: 64% Base clock 3.5 GHz, turbo 3.7 GHz (avg)
Poor: 64% Great: 85%
SPEED RANK: 213th / 1316
Gaming
Gaming 76%
Battleship
Desktop
Desktop 79%
Battleship
Workstation
Workstation 62%
Destroyer
150,236 User Benchmarks
Best Bench: 77% Base clock 2.7 GHz, turbo 3.1 GHz (avg)
Worst Bench: 56% Base clock 2.7 GHz, turbo 2.5 GHz (avg)
Poor: 56% Great: 77%
SPEED RANK: 337th / 1316
Gaming
Gaming 69%
Battle cruiser
Desktop
Desktop 73%
Battleship
Workstation
Workstation 52%
Yacht
Effective Speed
Effective CPU Speed
75.8 % Slightly faster effective speed.
+10%
69.2 %
Memory
Avg. Memory Latency
85.6 Pts Slightly lower memory latency.
+6%
81 Pts
1-Core
Avg. Single Core Mixed Speed
105 Pts Faster single-core speed.
+14%
92.1 Pts
2-Core
Avg. Dual Core Mixed Speed
204 Pts Faster dual-core speed.
+13%
181 Pts
4-Core
Avg. Quad Core Mixed Speed
358 Pts Slightly faster quad-core speed.
+8%
331 Pts
8-Core
Avg. Octa Core Mixed Speed
532 Pts Much faster octa-core speed.
+57%
339 Pts
Memory
OC Memory Latency
94.5 Pts +4% 90.9 Pts
1-Core
OC Single Core Mixed Speed
115 Pts Faster OC single-core speed.
+13%
102 Pts
2-Core
OC Dual Core Mixed Speed
227 Pts Faster OC dual-core speed.
+14%
200 Pts
4-Core
OC Quad Core Mixed Speed
424 Pts Faster OC quad-core speed.
+13%
376 Pts
8-Core
OC Octa Core Mixed Speed
592 Pts Much faster OC octa-core speed.
+58%
375 Pts
Market Share
Based on 46,613,981 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.02 % 0.35 % Insanely higher market share.
+1,650%
Value
Value For Money
71.8 % 77.7 % Slightly better value.
+8%
User Rating
UBM User Rating
53 % 56 % Slightly more popular.
+6%
Price
Price (score)
$337 $182 Much cheaper.
+46%
Age
Newest
99 Months 72 Months More recent.
+27%
TDP
Thermal Design Power (TDP)
84 Watts 65 Watts More energy efficient.
+23%
Cores
CPU Processing Cores
4 cores 4 cores
Threads
CPU Processing Threads
8 threads Hugely higher thread count.
+100%
4 threads
Lithography
Manufacturing process
22 nm 14 nm Much newer manufacturing.
+36%
Base Clock
Base Clock Speed
3.5 GHz Faster base frequency.
+30%
2.7 GHz
Turbo Clock
Turbo Clock Speed
3.9 GHz Faster turbo frequency.
+18%
3.3 GHz
64-Core
OC Multi Core Mixed Speed
593 Pts Much faster OC 64-core speed.
+56%
380 Pts
64-Core
Avg. Multi Core Mixed Speed
539 Pts Much faster 64-core speed.
+58%
342 Pts
Series
CPU Architecture
Haswell Skylake
Socket
Motherboard Socket
FCLGA1150 FCLGA1151
Graphics
Integrated Graphics
HD 4600 HD 530
Launch Date
Launch Date
Q3'13 Q3'15
Cache
Cache
8 MB SmartCache 6 MB SmartCache
Lithography
Lithography
22 nm 14 nm
Recommended Price
Recommended Customer Price
$314.00 - $320.00 $182.00 - $187.00
Max Turbo Frequency
Max Turbo Frequency
3.9 GHz 3.3 GHz
Bus Speed
Bus Speed
5 GT/s DMI2 8 GT/s DMI3
Thermal Solution Specification
Thermal Solution Specification
PCG 2013D PCG 2015C (65W)
Max Memory Size
Max Memory Size (dependent on memory type)
32 GB 64 GB
Memory Types
Memory Types
DDR3-1333/1600, DDR3L-1333/1600 @ 1.5V DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V
Memory Bandwidth
Max Memory Bandwidth
25.6 GB/s 34.1 GB/s
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 4600 Intel® HD Graphics 530
Graphics Output
Graphics Output
eDP/DP/HDMI/DVI/VGA eDP/DP/HDMI/DVI
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.2 GHz 950 MHz
Graphics Video Max Memory
Graphics Video Max Memory
2 GB 64 GB
Graphics and IMC Lithography
Graphics and IMC Lithography
22 nm 14 nm
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
Yes No
vPro Tech
Intel® vPro™ Technology ‡
Yes No
Stable Image Platform Program (SIPP)
Intel® Stable Image Platform Program (SIPP)
Yes No
Trusted Execution Tech
Intel® Trusted Execution Technology ‡
Yes No
PCI Express Revision
PCI Express Revision
Up to 3.0 3.0

More specs » More specs »
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The Intel i7-4771 is the same as the i7-4770 apart from a 100 MHz increase in base clock from 3.4 GHz to 3.5 GHz. In theory this increase will only impact multi-core workloads because both processors have the same turbo clock of 3.9 GHz which should be engaged during single and dual core workloads. On multi-core workloads the turbo needs to be disabled in order to maintain acceptable core temperatures and operating frequencies drop to base clock where the i7-4771 has a marginal 100 MHz or 2.9% advantage. In other words the two processors should be largely identical. Looking at the i7-4770 vs the i7-4771 benchmarks verifies this. Both the 4770 and 4771 are the current top end mainstream market leaders but for the vast majority of desktop users they are probably overkill as typical consumer use rarely requires more than two cores. [Mar '14 CPUPro]

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Processor Rankings (Price vs Performance) September 2021 CPU Rankings.

We calculate effective speed which measures real world performance for typical users. Effective speed is adjusted by current prices to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top CPUs. [CPUPro]

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Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
How Fast Is Your CPU? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

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How it works

  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - SkillBench (space shooter) tests user input accuracy.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.

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