Ultra 7 265T vs Xeon E5645

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Primary details

Comparing Xeon E5645 and Core Ultra 7 265T processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking1615not rated
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation1.38no data
Market segmentServerDesktop processor
Power efficiency3.74no data
Architecture codenameWestmere-EP (2010−2011)Arrow Lake-S (2024−2025)
Release date16 March 2010 (14 years ago)January 2025
Launch price (MSRP)$294no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Xeon E5645 and Core Ultra 7 265T 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 cores6 (Hexa-Core)20 (Icosa-Core)
Threads1220
Base clock speed2.4 GHz1.5 GHz
Boost clock speed2.67 GHz5.3 GHz
L1 cache64 KB (per core)112 KB (per core)
L2 cache256 KB (per core)3 MB (per core)
L3 cache12 MB (shared)30 MB (shared)
Chip lithography32 nm3 nm
Die size239 mm2243 mm2
Maximum core temperature76 °Cno data
Number of transistors1,170 million17,800 million
64 bit support++
Windows 11 compatibility-no data

Compatibility

Information on Xeon E5645 and Core Ultra 7 265T 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 configuration21
SocketFCLGA1366,LGA13661851
Power consumption (TDP)80 Watt35 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5645 and Core Ultra 7 265T. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.2no data
AES-NI++
AVX-+
vProno data+
Enhanced SpeedStep (EIST)++
Turbo Boost Technology1.0no data
Hyper-Threading Technology+no data
TSX-+
Idle States+no data
Demand Based Switching+no data
PAE40 Bitno data

Security technologies

Xeon E5645 and Core Ultra 7 265T technologies aimed at improving security, for example, by protecting against hacks.

TXT++
EDB+no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5645 and Core Ultra 7 265T are enumerated here.

VT-d++
VT-x++
EPT+no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5645 and Core Ultra 7 265T. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR5
Maximum memory size288 GBno data
Max memory channels3no data
Maximum memory bandwidth32 GB/sno data
ECC memory support+-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataArc Xe-LPG Graphics 64EU

Peripherals

Specifications and connection of peripherals supported by Xeon E5645 and Core Ultra 7 265T.

PCIe version2.05.0
PCI Express lanesno data20

Pros & cons summary


Physical cores 6 20
Threads 12 20
Chip lithography 32 nm 3 nm
Power consumption (TDP) 80 Watt 35 Watt

Ultra 7 265T has 233.3% more physical cores and 66.7% more threads, a 966.7% more advanced lithography process, and 128.6% lower power consumption.

We couldn't decide between Xeon E5645 and Core Ultra 7 265T. We've got no test results to judge.

Be aware that Xeon E5645 is a server/workstation processor while Core Ultra 7 265T is a desktop one.


Should you still have questions on choice between Xeon E5645 and Core Ultra 7 265T, ask them in Comments section, and we shall answer.

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Intel Xeon E5645
Xeon E5645
Intel Core Ultra 7 265T
Core Ultra 7 265T

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Community ratings

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4.1 58 votes

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3.7 3 votes

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Questions & comments

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