Intel Xeon X5650 vs L5640

older Released March, 2010

Intel Xeon X5650

2.66 GHz
Hexa core

Front view of Intel Xeon X5650

5.3 Out of 10

Reasons to buy the Intel Xeon X5650

	Much higher clock speed 2.66 GHz		Much better performance per dollar 1.44 pt/$
	Much higher Maximum operating temperature 81.3 °C		Higher turbo clock speed 3.06 GHz

VS

older Released March, 2010

Intel Xeon L5640

2.26 GHz
Hexa core

Front view of Intel Xeon L5640

5.3 Out of 10

Reasons to buy the L5640

	Significantly lower typical power consumption 48.75W		Better overclocked clock speed (Air) 3.9 GHz
	Significantly lower annual commercial energy cost 52.56 $/year		Significantly lower annual home energy cost 14.45 $/year

	Performance
	Benchmark performance using all cores
Xeon X5650 6.2 Xeon L5640 6.0 Xeon E5-2620 6.0
PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

	Single-core Performance
	Individual core benchmark performance
Xeon X5650 6.9 Xeon L5640 6.6 Xeon E5-2620 6.7
PassMark (Single Core), Geekbench 3 Single Core and 1 more

	Integrated Graphics
	Integrated GPU performance for graphics
Xeon X5650 0.0 Xeon L5640 0.0 Xeon E5-2620 0.0
Sky Diver and Cloud Gate

	Integrated Graphics (OpenCL)
	Integrated GPU performance for parallel computing
Xeon X5650 0.0 Xeon L5640 0.0 Xeon E5-2620 0.0
CompuBench 1.5 Bitcoin mining and 4 more

	Performance per Watt
	How efficiently does the processor use electricity?
Xeon X5650 5.0 Xeon L5640 5.1 Xeon E5-2620 5.0
Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

	Value
	Are you paying a premium for performance?
Xeon X5650 n.d. Xeon L5640 n.d. Xeon E5-2620 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 X5650

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Front view of Intel Xeon X5650

Front view of Intel Xeon L5640

Intel Xeon L5640

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Front view of Intel Xeon X5650

Reasons to consider the
Intel Xeon X5650

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Much higher clock speed

2.66 GHz

vs

2.26 GHz

Around 20% higher clock speed

Much better performance per dollar

1.44 pt/$

vs

0.63 pt/$

More than 2.2x better performance per dollar

Much higher Maximum operating temperature

81.3 °C

vs

69.4 °C

More than 15% higher Maximum operating temperature

Higher turbo clock speed

3.06 GHz

vs

2.8 GHz

Around 10% higher turbo clock speed

Much better overclocked clock speed (Water)

4.64 GHz

vs

2.27 GHz

More than 2x better overclocked clock speed (Water)

Front view of Intel Xeon L5640

Reasons to consider the
Intel Xeon L5640

Report a correction

Significantly lower typical power consumption

48.75W

vs

77.19W

More than 35% lower typical power consumption

Better overclocked clock speed (Air)

3.9 GHz

vs

3.84 GHz

Almost the same

Significantly lower annual commercial energy cost

52.56 $/year

vs

83.22 $/year

More than 35% lower annual commercial energy cost

Significantly lower annual home energy cost

14.45 $/year

vs

22.89 $/year

More than 35% lower annual home energy cost

GeekBench 3 (Multi-core) Data courtesy Primate Labs

22,313

16,852

GeekBench 3 (Single core) Data courtesy Primate Labs

2,176

1,918

GeekBench 3 (AES single core) Data courtesy Primate Labs

1,470,000 MB/s

1,250,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

13,247

11,047

GeekBench

14,009

11,047

PassMark Data courtesy Passmark

7,510

6,451

PassMark (Single Core)

1,234

1,100

summary	Xeon X5650	vs	L5640
Clock speed	2.66 GHz		2.26 GHz
Turbo clock speed	3.06 GHz		2.8 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		60W
Annual home energy cost	22.89 $/year		14.45 $/year
Annual commercial energy cost	83.22 $/year		52.56 $/year
Performance per watt	7.89 pt/W		10.46 pt/W
Typical power consumption	77.19W		48.75W
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 X5650	vs	L5640
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	20		17
Voltage range	0.75 - 1.35V		0.75 - 1.35V
Operating temperature	Unknown - 81.3°C		Unknown - 69.4°C
overclocking
Overclocked clock speed	3.84 GHz		3.9 GHz
Overclocked clock speed (Water)	4.64 GHz		2.27 GHz
Overclocked clock speed (Air)	3.84 GHz		3.9 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 X5650

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Intel Xeon L5640

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