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IntelBX80662I56600K
IntelBX80623I52500K
$246
▲ 7428,972 ▼

4 Cores, 4 Threads @3.5GHz, Skylake.
Release date: Q3 2015.

VS
▲ 769,602 ▼
 $246 

4 Cores, 4 Threads @3.3GHz, Sandy Bridge.
Release date: Q1 2011.

Effective Speed 
+10%
Real World Speed
Performance profile from 485,251 user samples
Benchmark your CPU here
342,244 User Benchmarks
Best Bench: 85% Base clock 3.5 GHz, turbo 4.7 GHz (avg)
Worst Bench: 57% Base clock 3.5 GHz, turbo 3.55 GHz (avg)
Poor: 57% Great: 85%
SPEED RANK: 375th / 1468
Gaming
Gaming 72%
Battleship
Desktop
Desktop 80%
Battleship
Workstation
Workstation 55%
Yacht
143,007 User Benchmarks
Best Bench: 79% Base clock 3.3 GHz, turbo 4.6 GHz (avg)
Worst Bench: 44% Base clock 3.3 GHz, turbo 0.5 GHz (avg)
Poor: 44% Great: 79%
SPEED RANK: 505th / 1468
Gaming
Gaming 66%
Battle cruiser
Desktop
Desktop 72%
Battleship
Workstation
Workstation 49%
Yacht
Effective Speed
Effective CPU Speed 		72.4 % Slightly faster effective speed.
+10% 		65.9 %
Average Score 
+20%
Memory
Avg. Memory Latency 		83.3 Pts +0% 83.1 Pts
1-Core
Avg. Single Core Speed 		110 Pts Faster single-core speed.
+24% 		88.4 Pts
2-Core
Avg. Dual Core Speed 		218 Pts Faster dual-core speed.
+25% 		174 Pts
4-Core
Avg. Quad Core Speed 		352 Pts Faster quad-core speed.
+25% 		281 Pts
8-Core
Avg. Octa Core Speed 		373 Pts Faster octa-core speed.
+24% 		300 Pts
Overclocked Score 
+15%
Memory
OC Memory Latency 		95.2 Pts +0% 94.9 Pts
1-Core
OC Single Core Speed 		136 Pts Faster OC single-core speed.
+19% 		114 Pts
2-Core
OC Dual Core Speed 		269 Pts Faster OC dual-core speed.
+19% 		227 Pts
4-Core
OC Quad Core Speed 		455 Pts Faster OC quad-core speed.
+20% 		380 Pts
8-Core
OC Octa Core Speed 		476 Pts Faster OC octa-core speed.
+19% 		399 Pts
Value & Sentiment 
+95%
Market Share
Based on 68,910,427 CPUs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.41 % Hugely higher market share.
+273% 		0.11 %
Value
Value For Money 		98.7 % Much better value.
+45% 		68.2 %
User Rating
UBM User Rating 		74 % 76 % +3%
Price
Price (score) 		$90 Much cheaper.
+63% 		$246
Nice To Haves 
+16%
Age
Newest 		111 Months Much more recent.
+33% 		166 Months
TDP
Thermal Design Power (TDP) 		91 Watts +4% 95 Watts
Cores
CPU Processing Cores 		4 cores 4 cores
Threads
CPU Processing Threads 		4 threads 4 threads
Lithography
Manufacturing process 		14 nm Much newer manufacturing.
+56% 		32 nm
Base Clock
Base Clock Speed 		3.5 GHz Slightly faster base frequency.
+6% 		3.3 GHz
Turbo Clock
Turbo Clock Speed 		3.9 GHz Slightly faster turbo frequency.
+5% 		3.7 GHz
64-Core
OC Multi Core Speed 		484 Pts Faster OC 64-core speed.
+19% 		407 Pts
64-Core
Avg. Multi Core Speed 		378 Pts Faster 64-core speed.
+24% 		304 Pts
Specifications 
Series
CPU Architecture 		Skylake Sandy Bridge
Socket
Motherboard Socket 		FCLGA1151 LGA1155
Graphics
Integrated Graphics 		HD 530 HD 3000
Launch Date
Launch Date 		Q3'15 Q1'11
Instruction Set Extensions
Instruction Set Extensions 		SSE4.1/4.2, AVX 2.0 SSE4.1/4.2, AVX
Lithography
Lithography 		14 nm 32 nm
Recommended Price
Recommended Customer Price 		$242.00 - $243.00 N/A
Max Turbo Frequency
Max Turbo Frequency 		3.9 GHz 3.7 GHz
Bus Speed
Bus Speed 		8 GT/s DMI3 5 GT/s DMI
Max Memory Size
Max Memory Size (dependent on memory type) 		64 GB 32 GB
Memory Types
Memory Types 		DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V DDR3 1066/1333
Memory Bandwidth
Max Memory Bandwidth 		34.1 GB/s 21 GB/s
Processor Graphics
Processor Graphics ‡ 		Intel® HD Graphics 530 Intel® HD Graphics 3000
Graphics Base Frequency
Graphics Base Frequency 		350 MHz 850 MHz
Wireless Display
Intel® Wireless Display 		Yes No
# of Displays Supported
# of Displays Supported ‡ 		3 2
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency 		1.15 GHz 1.1 GHz
Virtualization for Directed I/O (VT-d)
Intel® Virtualization Technology for Directed I/O (VT-d) ‡ 		Yes No
PCI Express Revision
PCI Express Revision 		3.0 2.0

More specs » More specs »
Conclusion 
Average Bench 72.4%
Average Bench 65.9%

The Intel Core i5-6600K is based on the new "Skylake" 14nm manufacturing process. Sporting 4 physical cores with base/turbo clocks of 3.5/3.9 GHz the 6600K and its predecessor, the 4690K share the same basic configuration and disappointingly, offer similar performance. Comparing the 6600K and 6700K shows that the 6700K has faster multi and single core performance. The improved multi core performance is due to Hyperthreading which is the key differentiator for the i7-6700K. The gap in single core performance can largely be eliminated by overclocking the i5-6600K so although the stock effective speed is significantly higher on the 6700K, this gap diminishes significantly when both processors are overclocked. At a 30% discount, the 6600K is the better value gaming CPU. [Aug '15 CPUPro]

MORE DETAILS

The i5-2500K is a second generation Sandy Bridge processor which is currently two generations old and nearly three years out of date. The many users that had the good sense to purchase this processor should feel in no hurry to upgrade as it's still no slouch, even by today's standards. The benchmark figures indicate that, even at stock clock rates, in terms of real-world performance this processor is approximately 20% slower than the best currently available, not bad considering its age. Given that the 2500K has an unlocked multiplier upping its performance by 10% with stock cooling should not pose much of a problem for the majority of owners. Here is a detailed performance comparison of the 2500K vs 4670K.  [Jul '13 CPUPro]

MORE DETAILS

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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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The Best
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