Phenom II X6 1055T (95W) vs Xeon E5640

Primary details

Comparing Xeon E5640 and Phenom II X6 1055T (95W) processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1699	1526
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.85	5.54
Market segment	Server	Desktop processor
Architecture codename	Westmere-EP (2010−2011)	Thuban (2010)
Release date	16 March 2010 (14 years ago)	1 May 2010 (14 years ago)
Launch price (MSRP)	$49	no data
Current price	$68 (1.4x MSRP)	$50

Cost-effectiveness evaluation

Performance per price, higher is better.

Phenom II X6 1055T (95W) has 552% better value for money than Xeon E5640.

Detailed specifications

Xeon E5640 and Phenom II X6 1055T (95W) basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	4 (Quad-Core)	6 (Hexa-Core)
Threads	8	6
Base clock speed	2.66 GHz	2.8 GHz
Boost clock speed	2.93 GHz	3.3 GHz
L1 cache	64 KB (per core)	128 KB (per core)
L2 cache	256 KB (per core)	512 KB (per core)
L3 cache	12 MB (shared)	6 MB (shared)
Chip lithography	32 nm	45 nm
Die size	239 mm2	346 mm2
Maximum core temperature	78 °C	no data
Number of transistors	1,170 million	904 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	No	No

Compatibility

Information on Xeon E5640 and Phenom II X6 1055T (95W) compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	2	1
Socket	FCLGA1366,LGA1366	AM3
Power consumption (TDP)	80 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5640 and Phenom II X6 1055T (95W). You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	no data
AES-NI	+	no data
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	1.0	no data
Hyper-Threading Technology	+	no data
Idle States	+	no data
Thermal Monitoring	-	no data
Demand Based Switching	+	no data
PAE	40 Bit	no data
Status	Discontinued	no data

Security technologies

Xeon E5640 and Phenom II X6 1055T (95W) technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5640 and Phenom II X6 1055T (95W) are enumerated here.

AMD-V	no data	+
VT-d	+	no data
VT-x	+	no data
EPT	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5640 and Phenom II X6 1055T (95W). Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	288 GB	no data
Max memory channels	3	no data
Maximum memory bandwidth	25.6 GB/s	no data
ECC memory support	+	no data

Peripherals

Specifications and connection of peripherals supported by Xeon E5640 and Phenom II X6 1055T (95W).

PCIe version

2.0

2.0

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

Phenom II X6 1055T (95W) outperforms Xeon E5640 by 34% based on our aggregate benchmark results.

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Pros & cons summary

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Performance score	2.39	3.21
Recency	16 March 2010	1 May 2010
Physical cores	4	6
Threads	8	6
Chip lithography	32 nm	45 nm
Power consumption (TDP)	80 Watt	95 Watt

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Should you still have questions on choice between Xeon E5640 and Phenom II X6 1055T (95W), ask them in Comments section, and we shall answer.

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