Core i5-1235U vs Xeon E5603

Primary Details

Comparing Xeon E5603 and Core i5-1235U processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	2184	797
Place by popularity	not in top-100	6
Cost-Effectiveness Evaluation	0.10	no data
Market segment	Server	Laptop
Series	no data	Intel Alder Lake-M
Architecture codename	Westmere-EP (2010−2011)	Alder Lake-U (2022)
Release date	14 February 2011 (13 years ago)	23 February 2022 (2 years ago)
Launch price (MSRP)	$286	no data
Current price	$249 (0.9x MSRP)	no data

Cost-Effectiveness Evaluation

Performance per price, higher is better.

Detailed Specifications

Xeon E5603 and Core i5-1235U 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)	10 (Deca-Core)
Threads	4	12
Base clock speed	1.6 GHz	1.3 GHz
Boost clock speed	1.6 GHz	4.4 GHz
L1 cache	64 KB (per core)	80K (per core)
L2 cache	256 KB (per core)	1.25 MB (per core)
L3 cache	4 MB (shared)	12 MB (shared)
Chip lithography	32 nm	Intel 7 nm
Die size	239 mm2	no data
Maximum core temperature	no data	100 °C
Number of transistors	1,170 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	No	No

Compatibility

Information on Xeon E5603 and Core i5-1235U 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	FCBGA1744
Power consumption (TDP)	80 Watt	15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5603 and Core i5-1235U. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
FMA	no data	+
AVX	no data	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	+
TSX	no data	+
Idle States	+	no data
Thermal Monitoring	-	+
Flex Memory Access	no data	+
Demand Based Switching	+	no data
PAE	40 Bit	no data
Status	Discontinued	Launched

Security technologies

Xeon E5603 and Core i5-1235U technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	no data	+
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5603 and Core i5-1235U are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5603 and Core i5-1235U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4, DDR4, DDR5, DDR5
Maximum memory size	288 GB	64 GB
Max memory channels	3	2
Maximum memory bandwidth	25.6 GB/s	no data
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	Intel® Iris® Xe Graphics eligible
Quick Sync Video	no data	+
Graphics max frequency	no data	1.2 GHz
Execution Units	no data	80

Graphics interfaces

Available interfaces and connections of Xeon E5603 and Core i5-1235U integrated GPUs.

Number of displays supported

no data

4

Graphics image quality

Maximum display resolutions supported by Xeon E5603 and Core i5-1235U integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	no data	4096 x 2304 @ 60Hz
Max resolution over eDP	no data	4096 x 2304 @ 120Hz
Max resolution over DisplayPort	no data	7680 x 4320 @ 60Hz

Graphics API support

APIs supported by Xeon E5603 and Core i5-1235U integrated GPUs, sometimes API versions are included.

DirectX	no data	12.1
OpenGL	no data	4.6

Peripherals

Specifications and connection of peripherals supported by Xeon E5603 and Core i5-1235U.

PCIe version	2.0	4.0
PCI Express lanes	no data	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.

Core i5-1235U outperforms Xeon E5603 by 597% based on our aggregated benchmark results.

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Pros & Cons Summary

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Performance score	1.25	8.71
Recency	14 February 2011	23 February 2022
Physical cores	4	10
Threads	4	12
Power consumption (TDP)	80 Watt	15 Watt

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Should you still have questions on choice between Xeon E5603 and Core i5-1235U, ask them in Comments section, and we shall answer.

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