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IntelBX80648I75820K
IntelBX80646I74790
▲ 669,878 ▼

6 Cores, 12 Threads @3.3GHz, Haswell-E.
Release date: Q3 2014.

VS
▲ 618,541 ▼

4 Cores, 8 Threads @3.6GHz, Haswell.
Release date: Q2 2014.

Effective Speed 
+8%
Real World Speed
Performance profile from 356,721 user samples
Benchmark your CPU here
101,694 User Benchmarks
Best Bench: 88% Base clock 3.3 GHz, turbo 4.6 GHz (avg)
Worst Bench: 68% Base clock 3.3 GHz, turbo 1.2 GHz (avg)
Poor: 68% Great: 88%
SPEED RANK: 281st / 1442
Gaming
Gaming 77%
Battleship
Desktop
Desktop 78%
Battleship
Workstation
Workstation 67%
Battle cruiser
255,027 User Benchmarks
Best Bench: 80% Base clock 3.6 GHz, turbo 4 GHz (avg)
Worst Bench: 58% Base clock 3.6 GHz, turbo 1.5 GHz (avg)
Poor: 58% Great: 80%
SPEED RANK: 371st / 1442
Gaming
Gaming 71%
Battleship
Desktop
Desktop 75%
Battleship
Workstation
Workstation 58%
Gunboat
Effective Speed
Effective CPU Speed 		76.8 % Slightly faster effective speed.
+8% 		71.4 %
Average Score 
+8%
Memory
Avg. Memory Latency 		86.4 Pts +5% 82.6 Pts
1-Core
Avg. Single Core Speed 		96.3 Pts 98.4 Pts +2%
2-Core
Avg. Dual Core Speed 		192 Pts +3% 187 Pts
4-Core
Avg. Quad Core Speed 		364 Pts Faster quad-core speed.
+11% 		327 Pts
8-Core
Avg. Octa Core Speed 		594 Pts Faster octa-core speed.
+23% 		482 Pts
Overclocked Score 
+16%
Memory
OC Memory Latency 		94 Pts +0% 93.6 Pts
1-Core
OC Single Core Speed 		120 Pts Faster OC single-core speed.
+10% 		109 Pts
2-Core
OC Dual Core Speed 		237 Pts Faster OC dual-core speed.
+11% 		214 Pts
4-Core
OC Quad Core Speed 		462 Pts Faster OC quad-core speed.
+23% 		377 Pts
8-Core
OC Octa Core Speed 		737 Pts Much faster OC octa-core speed.
+34% 		551 Pts
Value & Sentiment 
+95%
Market Share
Based on 67,713,254 CPUs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.16 % 0.8 % Hugely higher market share.
+400%
Value
Value For Money 		94.7 % Slightly better value.
+9% 		87.1 %
User Rating
UBM User Rating 		66 % Slightly more popular.
+8% 		61 %
Price
Price (score) 		$130 +4% $135
Nice To Haves 
+18%
Age
Newest 		116 Months +3% 119 Months
TDP
Thermal Design Power (TDP) 		140 Watts 84 Watts Much more energy efficient.
+40%
Cores
CPU Processing Cores 		6 cores Much higher core count.
+50% 		4 cores
Threads
CPU Processing Threads 		12 threads Much higher thread count.
+50% 		8 threads
Lithography
Manufacturing process 		22 nm 22 nm
Base Clock
Base Clock Speed 		3.3 GHz 3.6 GHz Slightly faster base frequency.
+9%
Turbo Clock
Turbo Clock Speed 		3.6 GHz 4 GHz Faster turbo frequency.
+11%
64-Core
OC Multi Core Speed 		933 Pts Much faster OC 64-core speed.
+68% 		556 Pts
64-Core
Avg. Multi Core Speed 		748 Pts Much faster 64-core speed.
+51% 		495 Pts
Specifications 
Series
CPU Architecture 		Haswell-E Haswell
Socket
Motherboard Socket 		LGA2011-V3 FCLGA1150
Graphics
Integrated Graphics 		None HD 4600
Launch Date
Launch Date 		Q3'14 Q2'14
Cache
Cache 		15 MB SmartCache 8 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions 		SSE4.2, AVX 2.0, AES SSE4.1/4.2, AVX 2.0
Recommended Price
Recommended Customer Price 		$389.00 - $396.00 $303.00 - $312.00
Max Turbo Frequency
Max Turbo Frequency 		3.6 GHz 4 GHz
Bus Speed
Bus Speed 		0 GT/s 5 GT/s DMI2
Max Memory Size
Max Memory Size (dependent on memory type) 		64 GB 32 GB
Memory Types
Memory Types 		DDR4 1333/1600/2133 DDR3-1333/1600, DDR3L-1333/1600 @ 1.5V
Memory Channels
Max # of Memory Channels 		4 2
Memory Bandwidth
Max Memory Bandwidth 		68 GB/s 25.6 GB/s
Processor Graphics
Processor Graphics ‡ 		None Intel® HD Graphics 4600
Package Size
Package Size 		52.5mm x 45.0mm 37.5mm x 37.5mm
vPro Tech
Intel® vPro™ Technology ‡ 		No Yes
Trusted Execution Tech
Intel® Trusted Execution Technology ‡ 		No Yes
PCI Express Revision
PCI Express Revision 		3.0 Up to 3.0
Max # of PCI Express Lanes
Max # of PCI Express Lanes 		28 16

More specs » More specs »
Conclusion 
Average Bench 76.8%
Average Bench 71.4%
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The Intel Core i7-5820K is the cheapest of three (5820K,5930K,5960X) new Haswell-E prosumer/enthusiast processors. The 5820K sports six physical cores and twelve threads which allow for enormous processing throughput. Unfortunately Intel have somewhat handicapped the 5820K by setting its base clock at just 3.3 GHz, 0.7GHz lower than the class leading 4790K. Comparing the 4790K and 5820K shows that the cheaper i7-4790K is significantly faster at both single and dual threaded workloads. The additional two cores found in the 5820K are not relevant to general computing and as such the 5820K probably makes a better server rather than consumer proposition. The Haswell-E X99 architecture also requires DDR4 RAM which is currently far more expensive than DDR3. Overall the 5820K is a very expensive option and probably best avoided by the vast majority of consumers.  [Sep '14 CPUPro]

MORE DETAILS

The Core i7-4790 is the third upgrade to Intel's flagship quad core hyper-threaded CPU. This version, like its predecessor the i7-4771, gets a 100 MHz bump in stock frequency and additionally the i7-4790 also gets a 100 MHz turbo frequency bump. These improvements (~4%) are marginal and practically impossible to discern in day to day use. Looking at a benchmark comparison between the 4771 and 4790 verifies that there is little difference between the two CPUs. Although the i7-4790 isn't much of a step forward, it's still one of the best (locked) mainstream processors on the market. AMD hasn't been able to compete with Intel on single threaded performance for several years, consequently Intel have no need to push the envelope. Overclockers should wait for the 4790K which is rumoured to be released shortly. [May '14 CPUPro]

MORE DETAILS

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