Xeon E3-1245 vs i7-3820

Primary details

Comparing Core i7-3820 and Xeon E3-1245 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1488	1564
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.32	1.19
Market segment	Desktop processor	Server
Power efficiency	2.64	3.35
Architecture codename	Sandy Bridge-E (2011−2013)	Sandy Bridge (2011−2013)
Release date	February 2012 (12 years ago)	3 April 2011 (13 years ago)
Launch price (MSRP)	$400	$350

Cost-effectiveness evaluation

Performance per price, higher is better.

i7-3820 has 95% better value for money than Xeon E3-1245.

Detailed specifications

Core i7-3820 and Xeon E3-1245 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)	4 (Quad-Core)
Threads	8	8
Base clock speed	3.6 GHz	3.3 GHz
Boost clock speed	3.8 GHz	3.7 GHz
Bus rate	5 GT/s	no data
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	256 KB (per core)
L3 cache	10240 KB (shared)	8 MB (shared)
Chip lithography	32 nm	32 nm
Die size	294 mm2	216 mm2
Maximum core temperature	no data	73 °C
Maximum case temperature (TCase)	67 °C	no data
Number of transistors	1270 million	1,160 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Core i7-3820 and Xeon E3-1245 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	1	1
Socket	FCLGA2011	LGA1155
Power consumption (TDP)	130 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-3820 and Xeon E3-1245. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2, Intel® AVX	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX
AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	+
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	no data	+
Smart Response	+	no data
Demand Based Switching	-	+
FDI	no data	+
Fast Memory Access	no data	+

Security technologies

Core i7-3820 and Xeon E3-1245 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	+
Identity Protection	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-3820 and Xeon E3-1245 are enumerated here.

VT-d	+	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-3820 and Xeon E3-1245. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	64.23 GB	32 GB
Max memory channels	4	2
Maximum memory bandwidth	51.2 GB/s	21 GB/s
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	Intel HD P3000
Quick Sync Video	-	+
Clear Video HD	no data	+
Graphics max frequency	no data	1.35 GHz
InTru 3D	no data	+

Graphics interfaces

Available interfaces and connections of Core i7-3820 and Xeon E3-1245 integrated GPUs.

Number of displays supported

no data

2

Peripherals

Specifications and connection of peripherals supported by Core i7-3820 and Xeon E3-1245.

PCIe version	2.0	2.0
PCI Express lanes	40	20

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.

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Pros & cons summary

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Performance score	3.63	3.36
Power consumption (TDP)	130 Watt	95 Watt

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Should you still have questions on choice between Core i7-3820 and Xeon E3-1245, ask them in Comments section, and we shall answer.

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