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| Intel Xeon L5420 vs Core2 Quad Q8400 |
Released March, 2008
Intel Xeon L5420
- 2.5 GHz
- Quad core
Reasons to buy the Intel Xeon L5420
![]() | Much more l2 cache 12 MB | ![]() | Much lower typical power consumption 40.63W |
![]() | Much more l2 cache per core 3 MB/core | ![]() | Supports more CPUs in SMP configuration 2 |
VS
Released April, 2009
Intel Core2 Quad Q8400
- 2.66 GHz
- Quad core
Reasons to buy the Core2 Quad Q8400
![]() | Slightly higher clock speed 2.66 GHz | ![]() | Much better performance per dollar 0.79 pt/$ |
![]() | Higher Maximum operating temperature 71.4 °C | ![]() | Newer Apr, 2009 |
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Differences What are the advantages of each
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Much more l2 cache | 12 MB | vs | 4 MB | 3x more l2 cache; more data can be stored in the l2 cache for quick access later | |||
---|---|---|---|---|---|---|---|
Much lower typical power consumption | 40.63W | vs | 135.97W | 3.3x lower typical power consumption | |||
Much more l2 cache per core | 3 MB/core | vs | 1 MB/core | 3x more l2 cache per core | |||
Supports more CPUs in SMP configuration | 2 | vs | 1 | Twice as many CPUs in SMP configuration | |||
Much lower annual home energy cost | 12.04 $/year | vs | 51.39 $/year | 4.3x lower annual home energy cost | |||
Much lower annual commercial energy cost | 43.8 $/year | vs | 130.79 $/year | 3x lower annual commercial energy cost | |||
Better performance per watt | 2.75 pt/W | vs | 0.94 pt/W | Around 3x better performance per watt | |||
Slightly better overclocked clock speed (Air) | 3.67 GHz | vs | 3.48 GHz | More than 5% better overclocked clock speed (Air) | |||
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Slightly higher clock speed | 2.66 GHz | vs | 2.5 GHz | More than 5% higher clock speed | |||
Much better performance per dollar | 0.79 pt/$ | vs | 0.33 pt/$ | More than 2.2x better performance per dollar | |||
Higher Maximum operating temperature | 71.4 °C | vs | 57 °C | More than 25% higher Maximum operating temperature | |||
Newer | Apr, 2009 | vs | Mar, 2008 | Release date over 1 years later |
Benchmarks Real world tests of Xeon L5420 vs Core2 Quad Q8400
GeekBench 3 (Multi-core) Data courtesy Primate Labs
Xeon L5420
4,968
Core2 Quad Q8400
5,035
GeekBench 3 (Single core) Data courtesy Primate Labs
Xeon L5420
1,380
Core2 Quad Q8400
1,465
GeekBench 3 (AES single core) Data courtesy Primate Labs
Xeon L5420
107,200 MB/s
Core2 Quad Q8400
113,900 MB/s
GeekBench (32-bit) Data courtesy Primate Labs
Xeon L5420
4,473
Core2 Quad Q8400
4,623
GeekBench (64-bit) Data courtesy Primate Labs
Xeon L5420
5,037
Core2 Quad Q8400
5,191
GeekBench
Xeon L5420
5,037
Core2 Quad Q8400
6,816
PassMark Data courtesy Passmark
Xeon L5420
3,506
Core2 Quad Q8400
3,197
PassMark (Single Core)
Xeon L5420
1,043
Core2 Quad Q8400
1,126
Specifications Full list of technical specs
summary | Xeon L5420 | vs | Core2 Quad Q8400 |
---|---|---|---|
Clock speed | 2.5 GHz | 2.66 GHz | |
Cores | Quad core | Quad core | |
Socket type | |||
LGA 771 | |||
LGA 775 | |||
features | |||
Has a NX bit | Yes | Yes | |
Supports trusted computing | No | No | |
Has virtualization support | Yes | Yes | |
Instruction set extensions | |||
SSE2 | |||
MMX | |||
SSE3 | |||
SSE | |||
SSE4.1 | |||
Supplemental SSE3 | |||
Supports dynamic frequency scaling | Yes | Yes | |
power consumption | |||
TDP | 50W | 95W | |
Annual home energy cost | 12.04 $/year | 51.39 $/year | |
Annual commercial energy cost | 43.8 $/year | 130.79 $/year | |
Performance per watt | 2.75 pt/W | 0.94 pt/W | |
Typical power consumption | 40.63W | 135.97W | |
bus | |||
Architecture | FSB | FSB | |
Number of links | 1 | 1 | |
Clock speed | 1,333 MHz | 1,333 MHz |
details | Xeon L5420 | vs | Core2 Quad Q8400 |
---|---|---|---|
Architecture | x86-64 | x86-64 | |
Threads | 4 | 4 | |
L2 cache | 12 MB | 4 MB | |
L2 cache per core | 3 MB/core | 1 MB/core | |
Manufacture process | 45 nm | 45 nm | |
Transistor count | 820,000,000 | 456,000,000 | |
Max CPUs | 2 | 1 | |
Clock multiplier | 7 | 8 | |
Voltage range | 0.85 - 1.35V | 0.85 - 1.36V | |
Operating temperature | Unknown - 57°C | Unknown - 71.4°C | |
overclocking | |||
Overclocked clock speed | 3.67 GHz | 3.48 GHz | |
Overclocked clock speed (Water) | 3.85 GHz | 3.91 GHz | |
Overclocked clock speed (Air) | 3.67 GHz | 3.48 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 |
Intel Xeon L5420 ![]() | Intel Core2 Quad Q8400 ![]() |
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