Core Ultra 7 155U vs Xeon E3-1275 v6

Primary details

Comparing Xeon E3-1275 v6 and Core Ultra 7 155U processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1035	686
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.64	no data
Market segment	Server	Laptop
Series	Intel Xeon E3	Intel Meteor Lake-U
Architecture codename	Kaby Lake (2016−2019)	Meteor Lake-P
Release date	28 March 2017 (7 years ago)	14 December 2023 (less than a year ago)
Launch price (MSRP)	$339	no data
Current price	$540 (1.6x MSRP)	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E3-1275 v6 and Core Ultra 7 155U 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)	12 (Dodeca-Core)
Threads	8	142 x 4.8  GHz Intel Redwood Cove P-Core8 x 3.8  GHz Intel Crestmont E-Core2 x 2.1  GHz Intel Crestmont E-Core
Base clock speed	3.8 GHz	1.7 GHz
Boost clock speed	4.2 GHz	4.8 GHz
Bus support	8 GT/s	no data
L1 cache	256 KB	112 KB (per core)
L2 cache	1 MB	2 MB (per core)
L3 cache	8 MB	12 MB (shared)
Chip lithography	14 nm	7 nm
64 bit support	+	+
Windows 11 compatibility	-	no data
Unlocked multiplier	No	No

Compatibility

Information on Xeon E3-1275 v6 and Core Ultra 7 155U 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	FCLGA1151	FCBGA2049
Power consumption (TDP)	73 Watt	15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E3-1275 v6 and Core Ultra 7 155U. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
AVX	+	+
vPro	+	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	+
TSX	+	+
Idle States	+	no data
Thermal Monitoring	+	+
Flex Memory Access	no data	+
SIPP	no data	-
Turbo Boost Max 3.0	no data	-
Status	Launched	Launched

Security technologies

Xeon E3-1275 v6 and Core Ultra 7 155U technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	+	+
MPX	+	no data
SGX	Yes with Intel® ME	no data
OS Guard	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E3-1275 v6 and Core Ultra 7 155U are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E3-1275 v6 and Core Ultra 7 155U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2400, DDR3L-1866	DDR5
Maximum memory size	64 GB	96 GB
Max memory channels	2	2
Maximum memory bandwidth	37.5 GB/s	no data
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD Graphics P630	Intel® Graphics
Max video memory	64 GB	no data
Quick Sync Video	+	+
Clear Video	+	no data
Clear Video HD	+	no data
Graphics max frequency	1.15 GHz	1.95 GHz
InTru 3D	+	no data

Graphics interfaces

Available interfaces and connections of Xeon E3-1275 v6 and Core Ultra 7 155U integrated GPUs.

Number of displays supported	3	4
eDP	+	no data
DisplayPort	+	no data
HDMI	+	no data
DVI	+	no data

Graphics image quality

Maximum display resolutions supported by Xeon E3-1275 v6 and Core Ultra 7 155U integrated GPUs, including resolutions over different interfaces.

4K resolution support	+	no data
Max resolution over HDMI 1.4	4096x2160@24Hz	4096 x 2304 @ 60Hz (HDMI 2.1 TMDS) 7680 x 4320 @ 60Hz (HDMI2.1 FRL)
Max resolution over eDP	4096x2304@60Hz	3840x2400 @ 120Hz
Max resolution over DisplayPort	4096x2304@60Hz	7680 x 4320 @ 60Hz
Max resolution over VGA	N/A	no data

Graphics API support

APIs supported by Xeon E3-1275 v6 and Core Ultra 7 155U integrated GPUs, sometimes API versions are included.

DirectX	12	12.2
OpenGL	4.4	4.6

Peripherals

Specifications and connection of peripherals supported by Xeon E3-1275 v6 and Core Ultra 7 155U.

PCIe version	3.0	4.0
PCI Express lanes	16	20
PCI support	no data	4.0

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 Ultra 7 155U outperforms Xeon E3-1275 v6 by 76% based on our aggregate benchmark results.

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Pros & cons summary

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Performance score	6.01	10.57
Recency	28 March 2017	14 December 2023
Physical cores	4	12
Threads	8	142 x 4.8 GHz Intel Redwood Cove P-Core8 x 3.8 GHz Intel Crestmont E-Core2 x 2.1 GHz Intel Crestmont E-Core
Chip lithography	14 nm	7 nm
Power consumption (TDP)	73 Watt	15 Watt

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Should you still have questions on choice between Xeon E3-1275 v6 and Core Ultra 7 155U, ask them in Comments section, and we shall answer.

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