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Intel
IntelBX80671I76800K
▲ 534,798 ▼

2 Cores, 2 Threads @3.0GHz, Core.
Release date: Q1 2008.

VS
▲ 659,598 ▼

6 Cores, 12 Threads @3.4GHz, Broadwell-E.
Release date: Q2 2016.

Effective Speed 
+101%
Real World Speed
Performance profile from 118,736 user samples
Benchmark your CPU here
68,540 User Benchmarks
Best Bench: 47% Base clock 3 GHz, turbo 2.95 GHz (avg)
Worst Bench: 24% Base clock 3 GHz, turbo 2.7 GHz (avg)
Poor: 24% Great: 47%
SPEED RANK: 1080th / 1464
Gaming
Gaming 40%
Speed boat
Desktop
Desktop 46%
Yacht
Workstation
Workstation 27%
Raft
50,196 User Benchmarks
Best Bench: 90% Base clock 3.4 GHz, turbo 4.1 GHz (avg)
Worst Bench: 71% Base clock 3.4 GHz, turbo 1.2 GHz (avg)
Poor: 71% Great: 90%
SPEED RANK: 237th / 1464
Gaming
Gaming 81%
Aircraft carrier
Desktop
Desktop 82%
Aircraft carrier
Workstation
Workstation 71%
Battleship
Effective Speed
Effective CPU Speed 		40.3 % 80.9 % Hugely faster effective speed.
+101%
Average Score 
+310%
Memory
Avg. Memory Latency 		67.9 Pts 86 Pts Lower memory latency.
+27%
1-Core
Avg. Single Core Speed 		41.2 Pts 107 Pts Hugely faster single-core speed.
+160%
2-Core
Avg. Dual Core Speed 		73.8 Pts 214 Pts Hugely faster dual-core speed.
+190%
4-Core
Avg. Quad Core Speed 		76.9 Pts 408 Pts Hugely faster quad-core speed.
+431%
8-Core
Avg. Octa Core Speed 		78.1 Pts 660 Pts Hugely faster octa-core speed.
+745%
Overclocked Score 
+290%
Memory
OC Memory Latency 		78.9 Pts 94.9 Pts Lower OC memory latency.
+20%
1-Core
OC Single Core Speed 		48.1 Pts 124 Pts Hugely faster OC single-core speed.
+158%
2-Core
OC Dual Core Speed 		95.5 Pts 248 Pts Hugely faster OC dual-core speed.
+160%
4-Core
OC Quad Core Speed 		95.4 Pts 483 Pts Hugely faster OC quad-core speed.
+406%
8-Core
OC Octa Core Speed 		95.4 Pts 770 Pts Hugely faster OC octa-core speed.
+707%
Value & Sentiment 
+52%
Market Share
Based on 68,801,779 CPUs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.02 % 0.05 % Hugely higher market share.
+150%
Value
Value For Money 		63.3 % 110 % Much better value.
+74%
User Rating
UBM User Rating 		53 % 65 % More popular.
+23%
Price
Price (score) 		$54 Much cheaper.
+40% 		$90
Nice To Haves 
+302%
Age
Newest 		201 Months 100 Months Much more recent.
+50%
TDP
Thermal Design Power (TDP) 		130 Watts Slightly more energy efficient.
+7% 		140 Watts
Cores
CPU Processing Cores 		2 cores 6 cores Hugely higher core count.
+200%
Threads
CPU Processing Threads 		2 threads 12 threads Hugely higher thread count.
+500%
Lithography
Manufacturing process 		45 nm 14 nm Much newer manufacturing.
+69%
Base Clock
Base Clock Speed 		3 GHz 3.4 GHz Faster base frequency.
+13%
Turbo Clock
Turbo Clock Speed 		3 GHz 3.8 GHz Faster turbo frequency.
+27%
64-Core
OC Multi Core Speed 		95.4 Pts 956 Pts Hugely faster OC 64-core speed.
+902%
64-Core
Avg. Multi Core Speed 		78 Pts 827 Pts Hugely faster 64-core speed.
+960%
Specifications 
Series
CPU Architecture 		Core Broadwell-E
Socket
Motherboard Socket 		LGA775 LGA2011-V3
Graphics
Integrated Graphics 		None None
Launch Date
Launch Date 		Q1'08 Q2'16
Cache
Cache 		6 MB L2 15 MB
Embedded Options Available
Embedded Options Available 		Yes No
Lithography
Lithography 		45 nm 14 nm
Recommended Price
Recommended Customer Price 		$149.00 - $179.00 N/A
Turbo Boost Tech
Intel® Turbo Boost Technology ‡ 		No 2.0
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡ 		No Yes
AES New Instructions
Intel® AES New Instructions 		No Yes
Trusted Execution Tech
Intel® Trusted Execution Technology ‡ 		Yes No

More specs » More specs »
Conclusion 
Average Bench 40.3%
Average Bench 80.9%

The Intel Core 2 Duo E8400 is amongst the fastest of the Core 2 Duo range of now nearly ten year old CPUs. The E8400 is included in our group tests simply as a reference point due to its huge success back in its day. Running at a clock speed of 3.0 GHz the E8400 has an effective speed of 52 which is 85% slower than its modern day counterparts. The relative lack of performance is especially noticeable in the area of multi-core processing as a consequence of the E8400's relatively few two cores. Anyone considering an upgrade needn't hesitate as modern CPUs are not only orders of magnitude faster but also considerably more energy efficient and feature packed. [Oct '14 CPUPro]

MORE DETAILS

The Core i7-6800K is the weakest of four new 14 nm Broadwell-E prosumer CPUs. This model has six cores with base and turbo frequencies of 3.4 and 3.8 GHz, a TDP of 140 watts and 28 PCIe 3.0 lanes. The 6800K closely matches, and supersedes, the very popular Haswell-E 5820K. Because of its MSRP of around $500, this CPU only makes sense for niche use cases which include graphics design, video production or multi GPU gaming. Comparing the 6800K and 6700K shows that for typical desktop use, at stock clocks, the 6800K actually lags the 6700K by around 10%. This is because desktop computing largely depends on single core performance and the Skylake i7-6700K is both clocked higher (Base clock 4.0 GHz vs 3.4 GHz) and has higher IPC due to its one generation lead over the 6800K. If the 6800K proves to be a capable overclocker then it may challenge the 6700K on a range of core-heavy use cases, time will tell. [Jun '16 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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