Xeon E3-1275 vs Core i7-2600K

Primary Details

Comparing Core i7-2600K and Xeon E3-1275 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1427	1424
Place by popularity	not in top-100	not in top-100
Cost-Effectiveness Evaluation	1.32	0.78
Market segment	Desktop processor	Server
Series	Intel Core i7 (Desktop)	no data
Architecture codename	Sandy Bridge (2011−2013)	Sandy Bridge (2011−2013)
Release date	9 January 2011 (13 years ago)	3 April 2011 (13 years ago)
Launch price (MSRP)	$317	$450
Current price	$120 (0.4x MSRP)	$383 (0.9x MSRP)

Cost-Effectiveness Evaluation

Performance per price, higher is better.

i7-2600K has 69% better value for money than Xeon E3-1275.

Detailed Specifications

Core i7-2600K and Xeon E3-1275 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	3.4 GHz	3.4 GHz
Boost clock speed	3.8 GHz	3.8 GHz
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256K (per core)	256 KB (per core)
L3 cache	8 MB (shared)	8 MB (shared)
Chip lithography	32 nm	32 nm
Die size	216 mm2	216 mm2
Maximum core temperature	73 °C	73 °C
Number of transistors	1,160 million	1,160 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	Yes	No

Compatibility

Information on Core i7-2600K and Xeon E3-1275 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	LGA1155	LGA1155
Power consumption (TDP)	95 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-2600K and Xeon E3-1275. You'll probably need this information if you require some particular technology.

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

Security technologies

Core i7-2600K and Xeon E3-1275 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 i7-2600K and Xeon E3-1275 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-2600K and Xeon E3-1275. Depending on the motherboard, higher memory frequencies may be supported.

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

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD Graphics 3000	Intel HD P3000
Quick Sync Video	+	+
Clear Video HD	+	+
Graphics max frequency	1.35 GHz	1.35 GHz
InTru 3D	+	+

Graphics interfaces

Available interfaces and connections of Core i7-2600K and Xeon E3-1275 integrated GPUs.

Number of displays supported

2

2

Peripherals

Specifications and connection of peripherals supported by Core i7-2600K and Xeon E3-1275.

PCIe version	2.0	2.0
PCI Express lanes	16	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.

Pros & Cons Summary

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Performance score	3.55	3.56
Recency	9 January 2011	3 April 2011
Cost	$317	$450

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Should you still have questions on choice between Core i7-2600K and Xeon E3-1275, ask them in Comments section, and we shall answer.

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