Celeron B815 vs Xeon X5660

Primary details

Comparing Xeon X5660 and Celeron B815 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1384	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.62	no data
Market segment	Server	Laptop
Series	no data	Intel Celeron
Architecture codename	Westmere-EP (2010−2011)	Sandy Bridge (2011−2013)
Release date	16 March 2010 (14 years ago)	1 January 2012 (12 years ago)
Launch price (MSRP)	$33	$86
Current price	$143 (4.3x MSRP)	$34 (0.4x MSRP)

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon X5660 and Celeron B815 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	6 (Hexa-Core)	2 (Dual-core)
Threads	12	2
Base clock speed	2.8 GHz	1.6 GHz
Boost clock speed	3.2 GHz	1.6 GHz
L1 cache	64 KB (per core)	64K (per core)
L2 cache	256 KB (per core)	256K (per core)
L3 cache	12 MB (shared)	2 MB (shared)
Chip lithography	32 nm	32 nm
Die size	239 mm2	131 mm2
Maximum core temperature	81 °C	100 °C
Number of transistors	1,170 million	504 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	No	No

Compatibility

Information on Xeon X5660 and Celeron B815 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	FCPGA988,PGA988
Power consumption (TDP)	95 Watt	35 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon X5660 and Celeron B815. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	Intel® SSE4.1, Intel® SSE4.2
AES-NI	+	-
FMA	no data	+
Enhanced SpeedStep (EIST)	+	+
My WiFi	no data	-
Turbo Boost Technology	1.0	-
Hyper-Threading Technology	+	-
Idle States	+	+
Thermal Monitoring	-	+
Flex Memory Access	no data	+
Demand Based Switching	+	-
PAE	40 Bit	no data
FDI	no data	+
Fast Memory Access	no data	+
Status	Discontinued	Discontinued

Security technologies

Xeon X5660 and Celeron B815 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+
Anti-Theft	no data	-

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon X5660 and Celeron B815 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon X5660 and Celeron B815. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	288 GB	16 GB
Max memory channels	3	2
Maximum memory bandwidth	32 GB/s	21.3 GB/s
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	Intel® HD Graphics for 2nd Generation Intel® Processors
Graphics max frequency	no data	1.05 GHz

Graphics interfaces

Available interfaces and connections of Xeon X5660 and Celeron B815 integrated GPUs.

Number of displays supported	no data	2
eDP	no data	+
DisplayPort	no data	+
HDMI	no data	+
SDVO	no data	+
CRT	no data	+

Peripherals

Specifications and connection of peripherals supported by Xeon X5660 and Celeron B815.

PCIe version	2.0	2.0
PCI Express lanes	no data	16

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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Pros & cons summary

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Recency	16 March 2010	1 January 2012
Physical cores	6	2
Threads	12	2
Cost	$33	$86
Power consumption (TDP)	95 Watt	35 Watt

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Should you still have questions on choice between Xeon X5660 and Celeron B815, ask them in Comments section, and we shall answer.

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