Intel Xeon X5670 vs E5645

older Released March, 2010

Intel Xeon X5670

2.93 GHz
Hexa core

Front view of Intel Xeon X5670

5.3 Out of 10

Reasons to buy the Intel Xeon X5670

	Much higher clock speed 2.93 GHz		Much higher turbo clock speed 3.33 GHz
	Much higher Maximum operating temperature 81.3 °C		Much better overclocked clock speed (Air) 4.29 GHz

VS

older Released March, 2010

Intel Xeon E5645

2.4 GHz
Hexa core

Front view of Intel Xeon E5645

5.3 Out of 10

Reasons to buy the E5645

	Much better performance per dollar 1.2 pt/$		Lower typical power consumption 65W
	Lower annual commercial energy cost 70.08 $/year		Lower annual home energy cost 19.27 $/year

	Performance
	Benchmark performance using all cores
Xeon X5670 6.4 Xeon E5645 6.1 Xeon E5540 5.6
PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

	Single-core Performance
	Individual core benchmark performance
Xeon X5670 7.1 Xeon E5645 6.6 Xeon E5540 6.1
PassMark (Single Core), Geekbench 3 Single Core and 1 more

	Integrated Graphics
	Integrated GPU performance for graphics
Xeon X5670 0.0 Xeon E5645 0.0 Xeon E5540 0.0
Sky Diver and Cloud Gate

	Integrated Graphics (OpenCL)
	Integrated GPU performance for parallel computing
Xeon X5670 0.0 Xeon E5645 0.0 Xeon E5540 0.0
CompuBench 1.5 Bitcoin mining and 4 more

	Performance per Watt
	How efficiently does the processor use electricity?
Xeon X5670 5.0 Xeon E5645 5.0 Xeon E5540 5.0
Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

	Value
	Are you paying a premium for performance?
Xeon X5670 n.d. Xeon E5645 n.d. Xeon E5540 n.d.
Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

No winner declared

Too close to call

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Intel Xeon X5670

Front view of Intel Xeon X5670

Front view of Intel Xeon E5645

Intel Xeon E5645

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Front view of Intel Xeon X5670

Reasons to consider the
Intel Xeon X5670

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Much higher clock speed

2.93 GHz

vs

2.4 GHz

More than 20% higher clock speed

Much higher turbo clock speed

3.33 GHz

vs

2.67 GHz

Around 25% higher turbo clock speed

Much higher Maximum operating temperature

81.3 °C

vs

76.2 °C

More than 5% higher Maximum operating temperature

Much better overclocked clock speed (Air)

4.29 GHz

vs

3.39 GHz

More than 25% better overclocked clock speed (Air)

Much better overclocked clock speed (Water)

4.5 GHz

vs

2.4 GHz

More than 85% better overclocked clock speed (Water)

Front view of Intel Xeon E5645

Reasons to consider the
Intel Xeon E5645

Report a correction

Much better performance per dollar

1.2 pt/$

vs

0.56 pt/$

Around 2.2x better performance per dollar

Lower typical power consumption

65W

vs

77.19W

More than 15% lower typical power consumption

Lower annual commercial energy cost

70.08 $/year

vs

83.22 $/year

More than 15% lower annual commercial energy cost

Lower annual home energy cost

19.27 $/year

vs

22.89 $/year

More than 15% lower annual home energy cost

GeekBench 3 (Multi-core) Data courtesy Primate Labs

24,364

20,172

GeekBench 3 (Single core) Data courtesy Primate Labs

2,341

1,968

GeekBench 3 (AES single core) Data courtesy Primate Labs

1,590,000 MB/s

1,340,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

13,847

11,304

GeekBench (64-bit) Data courtesy Primate Labs

14,780

11,929

GeekBench

14,780

11,929

PassMark Data courtesy Passmark

8,013

6,545

PassMark (Single Core)

1,347

1,083

summary	Xeon X5670	vs	E5645
Clock speed	2.93 GHz		2.4 GHz
Turbo clock speed	3.33 GHz		2.67 GHz
Cores	Hexa core		Hexa core
Socket type
LGA 1366
features
Has a NX bit	Yes		Yes
Supports trusted computing	Yes		Yes
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	95W		80W
Annual home energy cost	22.89 $/year		19.27 $/year
Annual commercial energy cost	83.22 $/year		70.08 $/year
Performance per watt	8.54 pt/W		8.49 pt/W
Typical power consumption	77.19W		65W
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		Yes
Maximum bandwidth	31,999.98 MB/s		31,999.98 MB/s
Maximum memory size	294,912 MB		294,912 MB

details	Xeon X5670	vs	E5645
Architecture	x86-64		x86-64
Threads	12		12
L2 cache	2 MB		2 MB
L2 cache per core	0.33 MB/core		0.33 MB/core
L3 cache	12 MB		12 MB
L3 cache per core	2 MB/core		2 MB/core
Manufacture process	32 nm		32 nm
Max CPUs	2		2
Clock multiplier	22		18
Voltage range	0.75 - 1.35V		0.75 - 1.35V
Operating temperature	Unknown - 81.3°C		Unknown - 76.2°C
overclocking
Overclock popularity	8		3
Overclocked clock speed	4.29 GHz		3.39 GHz
Overclocked clock speed (Water)	4.5 GHz		2.4 GHz
Overclocked clock speed (Air)	4.29 GHz		3.39 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		2
Data rate	51,200 MB/s		46,928 MB/s
Transfer rate	6,400 MT/s		5,860 MT/s
Clock speed	3,200 MHz		2,930 MHz

Intel Xeon X5670

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Intel Xeon E5645

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