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| Intel Xeon E5645 vs Core i7 6700K |
Released March, 2010
Intel Xeon E5645
- 2.4 GHz
- Hexa core
Reasons to buy the Intel Xeon E5645
![]() | Significantly more l2 cache 2 MB | ![]() | More l3 cache 12 MB |
![]() | Supports more CPUs in SMP configuration 2 | ![]() | Much better performance per watt 8.49 pt/W |
VS
Released July, 2015
Intel Core i7 6700K
- 4 GHz
- Quad core
- Unlocked
Reasons to buy the Core i7 6700K
![]() | Much higher clock speed 4 GHz | ![]() | Much higher turbo clock speed 4.2 GHz |
![]() | Much newer manufacturing process 14 nm | ![]() | Has a built-in GPU Yes |
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Differences What are the advantages of each
| |||||||
Significantly more l2 cache | 2 MB | vs | 1 MB | 2x more l2 cache; more data can be stored in the l2 cache for quick access later | |||
---|---|---|---|---|---|---|---|
More l3 cache | 12 MB | vs | 8 MB | 50% more l3 cache; more data can be stored in the l3 cache for quick access later | |||
Supports more CPUs in SMP configuration | 2 | vs | 1 | Twice as many CPUs in SMP configuration | |||
Much better performance per watt | 8.49 pt/W | vs | 3.49 pt/W | Around 2.5x better performance per watt | |||
Supports trusted computing | Yes | vs | No | Somewhat common; Allows for safer, more reliable computing | |||
Significantly better performance per dollar | 1.2 pt/$ | vs | 0.91 pt/$ | More than 30% better performance per dollar | |||
More cores | 6 | vs | 4 | 2 more cores; run more applications at once | |||
More threads | 12 | vs | 8 | 4 more threads | |||
Lower typical power consumption | 65W | vs | 73.94W | More than 10% lower typical power consumption | |||
Higher Maximum operating temperature | 76.2 °C | vs | 64 °C | Around 20% higher Maximum operating temperature | |||
Supports more RAM | 294,912 MB | vs | 65,536 MB | Supports 4.5x more RAM | |||
More l2 cache per core | 0.33 MB/core | vs | 0.25 MB/core | Around 35% more l2 cache per core | |||
Lower annual home energy cost | 19.27 $/year | vs | 21.92 $/year | More than 10% lower annual home energy cost | |||
Lower annual commercial energy cost | 70.08 $/year | vs | 79.72 $/year | More than 10% lower annual commercial energy cost | |||
| |||||||
Much higher clock speed | 4 GHz | vs | 2.4 GHz | More than 65% higher clock speed | |||
Much higher turbo clock speed | 4.2 GHz | vs | 2.67 GHz | More than 55% higher turbo clock speed | |||
Much newer manufacturing process | 14 nm | vs | 32 nm | A newer manufacturing process allows for a more powerful, yet cooler running processor | |||
Has a built-in GPU | Yes | vs | No | Somewhat common; A separate graphics adapter is not required | |||
Much better PassMark (Single core) score | 2,349 | vs | 1,083 | Around 2.2x better PassMark (Single core) score | |||
Significantly better PassMark score | 11,109 | vs | 6,545 | Around 70% better PassMark score | |||
Significantly better overclocked clock speed (Air) | 4.61 GHz | vs | 3.39 GHz | More than 35% better overclocked clock speed (Air) | |||
Newer | Jul, 2015 | vs | Mar, 2010 | Release date over 5 years later | |||
Much better overclocked clock speed (Water) | 4.77 GHz | vs | 2.4 GHz | Around 2x better overclocked clock speed (Water) |
Benchmarks Real world tests of Xeon E5645 vs Core i7 6700K
GeekBench 3 (Multi-core) Data courtesy Primate Labs
Xeon E5645
20,172
Core i7 6700K
17,583
GeekBench 3 (Single core) Data courtesy Primate Labs
Xeon E5645
1,968
Core i7 6700K
4,510
GeekBench 3 (AES single core) Data courtesy Primate Labs
Xeon E5645
1,340,000 MB/s
Core i7 6700K
6,010 MB/s
GeekBench (32-bit) Data courtesy Primate Labs
Xeon E5645
11,304
Core i7 6700K
17,169
GeekBench
Xeon E5645
11,929
Core i7 6700K
17,169
PassMark Data courtesy Passmark
Xeon E5645
6,545
Core i7 6700K
11,109
PassMark (Single Core)
Xeon E5645
1,083
Core i7 6700K
2,349
Specifications Full list of technical specs
summary | Xeon E5645 | vs | Core i7 6700K |
---|---|---|---|
Clock speed | 2.4 GHz | 4 GHz | |
Turbo clock speed | 2.67 GHz | 4.2 GHz | |
Cores | Hexa core | Quad core | |
features | |||
Has a NX bit | Yes | Yes | |
Supports trusted computing | Yes | No | |
Has virtualization support | Yes | Yes | |
Instruction set extensions | |||
SSE2 | |||
MMX | |||
SSE4 | |||
AVX | |||
SSE3 | |||
SSE | |||
SSE4.1 | |||
SSE4.2 | |||
Supplemental SSE3 | |||
AES | |||
AVX 2.0 | |||
Supports dynamic frequency scaling | Yes | Yes | |
power consumption | |||
TDP | 80W | 91W | |
Annual home energy cost | 19.27 $/year | 21.92 $/year | |
Annual commercial energy cost | 70.08 $/year | 79.72 $/year | |
Performance per watt | 8.49 pt/W | 3.49 pt/W | |
Typical power consumption | 65W | 73.94W | |
bus | |||
Architecture | QPI | FSB | |
Number of links | 2 | 0 | |
Transfer rate | 5,860 MT/s | 8,000 MT/s |
details | Xeon E5645 | vs | Core i7 6700K |
---|---|---|---|
Architecture | x86-64 | x86-64 | |
Threads | 12 | 8 | |
L2 cache | 2 MB | 1 MB | |
L2 cache per core | 0.33 MB/core | 0.25 MB/core | |
L3 cache | 12 MB | 8 MB | |
L3 cache per core | 2 MB/core | 2 MB/core | |
Manufacture process | 32 nm | 14 nm | |
Max CPUs | 2 | 1 | |
Operating temperature | Unknown - 76.2°C | Unknown - 64°C | |
overclocking | |||
Overclocked clock speed | 3.39 GHz | 4.61 GHz | |
Overclocked clock speed (Water) | 2.4 GHz | 4.77 GHz | |
Overclocked clock speed (Air) | 3.39 GHz | 4.61 GHz | |
integrated graphics | |||
GPU | None | GPU | |
Label | N/A | Intel® HD Graphics 530 | |
Number of displays supported | N/A | 3 | |
GPU clock speed | N/A | 350 MHz | |
Turbo clock speed | N/A | 1,150 MHz | |
memory controller | |||
Memory controller | Built-in | Built-in | |
Memory type | |||
DDR3L-1600 | |||
DDR3-1333 | |||
DDR3-1066 | |||
DDR3 | |||
DDR3-800 | |||
Channels | Triple Channel | Dual Channel | |
Supports ECC | Yes | No | |
Maximum bandwidth | 31,999.98 MB/s | 25,600 MB/s | |
Maximum memory size | 294,912 MB | 65,536 MB |
Intel Xeon E5645 ![]() | Intel Core i7 6700K ![]() |
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