Ultra 7 265KF vs Xeon E3-1281 v3

VS

Aggregate performance score

Xeon E3-1281 v3
2014
4 cores / 8 threads, 82 Watt
4.71
Core Ultra 7 265KF
2024
20 cores / 20 threads, 125 Watt
37.46
+695%

Core Ultra 7 265KF outperforms Xeon E3-1281 v3 by a whopping 695% based on our aggregate benchmark results.

Primary details

Comparing Xeon E3-1281 v3 and Core Ultra 7 265KF processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking127282
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluationno data99.21
Market segmentServerDesktop processor
Power efficiency5.4128.21
Architecture codenameno dataArrow Lake-S (2024−2025)
Release date1 April 2014 (10 years ago)24 October 2024 (less than a year ago)
Launch price (MSRP)no data$379

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Xeon E3-1281 v3 and Core Ultra 7 265KF 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 cores4 (Quad-Core)20 (Icosa-Core)
Threads820
Base clock speed3.7 GHz3.9 GHz
Boost clock speed4.1 GHz5.5 GHz
Bus rate5 GT/sno data
L1 cacheno data112 KB (per core)
L2 cacheno data3 MB (per core)
L3 cache8 MB Intel® Smart Cache30 MB (shared)
Chip lithography22 nm3 nm
Die sizeno data243 mm2
Number of transistorsno data17,800 million
64 bit support++
Windows 11 compatibility-no data
Unlocked multiplier-+

Compatibility

Information on Xeon E3-1281 v3 and Core Ultra 7 265KF 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 configuration11
SocketFCLGA11501851
Power consumption (TDP)82 Watt125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E3-1281 v3 and Core Ultra 7 265KF. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2no data
AES-NI++
AVX-+
Enhanced SpeedStep (EIST)++
Turbo Boost Technology2.0no data
Hyper-Threading Technology+no data
TSX++
Idle States+no data
Thermal Monitoring+-
Flex Memory Access+no data
SIPP+-
Fast Memory Access+no data

Security technologies

Xeon E3-1281 v3 and Core Ultra 7 265KF technologies aimed at improving security, for example, by protecting against hacks.

TXT++
EDB+no data
Secure Key+no data
Identity Protection+-
OS Guard+no data
Anti-Theft+no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E3-1281 v3 and Core Ultra 7 265KF are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E3-1281 v3 and Core Ultra 7 265KF. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3L-1333, DDR3L-1600DDR5
Maximum memory size32 GBno data
Max memory channels2no data
Maximum memory bandwidth25.6 GB/sno data
ECC memory support+-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataN/A

Peripherals

Specifications and connection of peripherals supported by Xeon E3-1281 v3 and Core Ultra 7 265KF.

PCIe version3.05.0
PCI Express lanes1620

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.


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.

Xeon E3-1281 v3 4.71
Ultra 7 265KF 37.46
+695%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Xeon E3-1281 v3 7483
Ultra 7 265KF 59499
+695%

Gaming performance

Pros & cons summary


Performance score 4.71 37.46
Recency 1 April 2014 24 October 2024
Physical cores 4 20
Threads 8 20
Chip lithography 22 nm 3 nm
Power consumption (TDP) 82 Watt 125 Watt

Xeon E3-1281 v3 has 52.4% lower power consumption.

Ultra 7 265KF, on the other hand, has a 695.3% higher aggregate performance score, an age advantage of 10 years, 400% more physical cores and 150% more threads, and a 633.3% more advanced lithography process.

The Core Ultra 7 265KF is our recommended choice as it beats the Xeon E3-1281 v3 in performance tests.

Be aware that Xeon E3-1281 v3 is a server/workstation processor while Core Ultra 7 265KF is a desktop one.


Should you still have questions on choice between Xeon E3-1281 v3 and Core Ultra 7 265KF, ask them in Comments section, and we shall answer.

Vote for your favorite

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Intel Xeon E3-1281 v3
Xeon E3-1281 v3
Intel Core Ultra 7 265KF
Core Ultra 7 265KF

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Community ratings

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Questions & comments

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