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| Intel Xeon E5649 vs Core i7 920 |
Released February, 2011
Intel Xeon E5649
- 2.53 GHz
- Hexa core
Reasons to buy the Intel Xeon E5649
![]() | Much better geekbench 3 AES single core score 1,240,000 MB/s | ![]() | Significantly more l2 cache 2 MB |
![]() | Much lower typical power consumption 65W | ![]() | Much newer manufacturing process 32 nm |
VS
Released October, 2008
Intel Core i7 920
- 2.66 GHz
- Quad core
Reasons to buy the Core i7 920
![]() | Slightly higher clock speed 2.66 GHz | ![]() | Slightly better overclocked clock speed (Water) 4.24 GHz |
CPUBoss Review Our evaluation of E5649 vs 920 among all CPUs
Performance | |
Benchmark performance using all cores | |
PCMark 8 Home 3.0 Accelerated, PassMark and 1 more |
Single-core Performance | |
Individual core benchmark performance | |
PassMark (Single Core), Geekbench 3 Single Core and 1 more |
Integrated Graphics | |
Integrated GPU performance for graphics | |
Sky Diver and Cloud Gate |
Integrated Graphics (OpenCL) | |
Integrated GPU performance for parallel computing | |
CompuBench 1.5 Bitcoin mining and 4 more |
Performance per Watt | |
How efficiently does the processor use electricity? | |
Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more |
Value | |
Are you paying a premium for performance? | |
Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more |
No winner declared
Too close to call
Cast your vote Do you agree or disagree with CPUBoss?
VS
Intel Xeon E5649CPUBoss Winner | ![]() | |
Differences What are the advantages of each
| |||||||
Much better geekbench 3 AES single core score | 1,240,000 MB/s | vs | 143,700 MB/s | Around 8.8x better geekbench 3 AES single core score | |||
---|---|---|---|---|---|---|---|
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 | |||
Much lower typical power consumption | 65W | vs | 135.63W | 2.1x lower typical power consumption | |||
Much newer manufacturing process | 32 nm | vs | 45 nm | A newer manufacturing process allows for a more powerful, yet cooler running processor | |||
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 | |||
Much better performance per watt | 7.4 pt/W | vs | 1.21 pt/W | Around 6.2x better performance per watt | |||
Supports more CPUs in SMP configuration | 2 | vs | 1 | Twice as many CPUs in SMP configuration | |||
Supports trusted computing | Yes | vs | No | Somewhat common; Allows for safer, more reliable computing | |||
More cores | 6 | vs | 4 | 2 more cores; run more applications at once | |||
Much lower annual home energy cost | 19.27 $/year | vs | 48.38 $/year | 2.5x lower annual home energy cost | |||
More threads | 12 | vs | 8 | 4 more threads | |||
Better PassMark score | 7,051 | vs | 4,958 | More than 40% better PassMark score | |||
Much lower annual commercial energy cost | 70.08 $/year | vs | 134.55 $/year | Around 50% lower annual commercial energy cost | |||
Better performance per dollar | 0.76 pt/$ | vs | 0.61 pt/$ | More than 25% better performance per dollar | |||
Newer | Feb, 2011 | vs | Oct, 2008 | Release date over 2 years later | |||
Higher Maximum operating temperature | 76.2 °C | vs | 67.9 °C | More than 10% higher Maximum operating temperature | |||
More l2 cache per core | 0.33 MB/core | vs | 0.25 MB/core | Around 35% more l2 cache per core | |||
| |||||||
Slightly higher clock speed | 2.66 GHz | vs | 2.53 GHz | More than 5% higher clock speed | |||
Slightly better overclocked clock speed (Water) | 4.24 GHz | vs | 4.11 GHz | Around 5% better overclocked clock speed (Water) |
Benchmarks Real world tests of Xeon E5649 vs Core i7 920
GeekBench 3 (Multi-core) Data courtesy Primate Labs
Xeon E5649
10,428
Core i7 920
7,014
GeekBench 3 (Single core) Data courtesy Primate Labs
Xeon E5649
1,902
Core i7 920
1,959
GeekBench 3 (AES single core) Data courtesy Primate Labs
Xeon E5649
1,240,000 MB/s
Core i7 920
143,700 MB/s
GeekBench (32-bit) Data courtesy Primate Labs
Xeon E5649
11,227
Core i7 920
7,125
GeekBench
Xeon E5649
11,227
Core i7 920
9,242
PassMark Data courtesy Passmark
Xeon E5649
7,051
Core i7 920
4,958
PassMark (Single Core)
Xeon E5649
1,162
Core i7 920
1,164
Specifications Full list of technical specs
summary | Xeon E5649 | vs | Core i7 920 |
---|---|---|---|
Clock speed | 2.53 GHz | 2.66 GHz | |
Turbo clock speed | 2.93 GHz | 2.93 GHz | |
Cores | Hexa core | Quad core | |
Socket type | |||
LGA 1366 | |||
features | |||
Has a NX bit | Yes | Yes | |
Supports trusted computing | Yes | No | |
Has virtualization support | Yes | Yes | |
Instruction set extensions | |||
SSE2 | |||
MMX | |||
SSE4 | |||
SSE3 | |||
SSE | |||
SSE4.1 | |||
SSE4.2 | |||
Supplemental SSE3 | |||
AES | |||
Supports dynamic frequency scaling | Yes | Yes | |
power consumption | |||
TDP | 80W | 130W | |
Annual home energy cost | 19.27 $/year | 48.38 $/year | |
Annual commercial energy cost | 70.08 $/year | 134.55 $/year | |
Performance per watt | 7.4 pt/W | 1.21 pt/W | |
Typical power consumption | 65W | 135.63W | |
memory controller | |||
Memory controller | Built-in | Built-in | |
Memory type | |||
DDR3-1333 | |||
DDR3-1066 | |||
DDR3-800 | |||
DDR3 | |||
Channels | Triple Channel | Triple Channel | |
Supports ECC | Yes | No | |
Maximum bandwidth | 31,999.98 MB/s | 25,599.99 MB/s |
details | Xeon E5649 | vs | Core i7 920 |
---|---|---|---|
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 | 45 nm | |
Max CPUs | 2 | 1 | |
Clock multiplier | 19 | 20 | |
Voltage range | 0.75 - 1.35V | 0.8 - 1.38V | |
Operating temperature | Unknown - 76.2°C | Unknown - 67.9°C | |
overclocking | |||
Overclock popularity | 0 | 491 | |
Overclocked clock speed | 4.25 GHz | 4.22 GHz | |
Overclocked clock speed (Water) | 4.11 GHz | 4.24 GHz | |
Overclocked clock speed (Air) | 4.25 GHz | 4.22 GHz | |
integrated graphics | |||
GPU | None | None | |
Label | N/A | N/A | |
Latest DirectX | N/A | N/A | |
Number of displays supported | N/A | N/A | |
GPU clock speed | N/A | N/A | |
Turbo clock speed | N/A | N/A | |
3DMark06 | N/A | N/A | |
bus | |||
Architecture | QPI | QPI | |
Number of links | 2 | 1 | |
Data rate | 46,928 MB/s | 19,200 MB/s | |
Transfer rate | 5,860 MT/s | 4,800 MT/s | |
Clock speed | 2,930 MHz | 2,400 MHz |
Intel Xeon E5649 ![]() | Intel Core i7 920 ![]() |
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