Pentium G645 vs Xeon E3-1225

Primary details

Comparing Xeon E3-1225 and Pentium G645 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1750	2531
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	1.41	0.06
Market segment	Server	Desktop processor
Power efficiency	2.45	1.31
Architecture codename	Sandy Bridge (2011−2013)	Sandy Bridge (2011−2013)
Release date	3 April 2011 (13 years ago)	2 September 2012 (12 years ago)
Launch price (MSRP)	$150	$80

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon E3-1225 has 2250% better value for money than Pentium G645.

Detailed specifications

Xeon E3-1225 and Pentium G645 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)	2 (Dual-core)
Threads	4	2
Base clock speed	3.1 GHz	2.9 GHz
Boost clock speed	3.4 GHz	2.9 GHz
Bus rate	no data	5 GT/s
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	256 KB (per core)
L3 cache	6 MB (shared)	3 MB (shared)
Chip lithography	32 nm	32 nm
Die size	216 mm2	131 mm2
Maximum core temperature	73 °C	69 °C
Number of transistors	1,160 million	504 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Xeon E3-1225 and Pentium G645 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	FCLGA1155
Power consumption (TDP)	95 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E3-1225 and Pentium G645. 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
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	+	+

Security technologies

Xeon E3-1225 and Pentium G645 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+
Identity Protection	+	-

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E3-1225 and Pentium G645 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E3-1225 and Pentium G645. 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	17 GB/s
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD P3000	Intel® HD Graphics for 2nd Generation Intel® Processors
Quick Sync Video	+	-
Clear Video HD	+	-
Graphics max frequency	1.35 GHz	1.1 GHz
InTru 3D	+	-

Graphics interfaces

Available interfaces and connections of Xeon E3-1225 and Pentium G645 integrated GPUs.

Number of displays supported

2

2

Peripherals

Specifications and connection of peripherals supported by Xeon E3-1225 and Pentium G645.

PCIe version	2.0	2.0
PCI Express lanes	20	no data

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	2.51	0.92
Recency	3 April 2011	2 September 2012
Physical cores	4	2
Threads	4	2
Power consumption (TDP)	95 Watt	65 Watt

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Should you still have questions on choice between Xeon E3-1225 and Pentium G645, ask them in Comments section, and we shall answer.

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