Xeon E3-1275 vs i7-3820

VS

Aggregate performance score

Core i7-3820
2012
4 cores / 8 threads, 130 Watt
3.63
+4.6%
Xeon E3-1275
2011
4 cores / 8 threads, 95 Watt
3.47

Core i7-3820 outperforms Xeon E3-1275 by a small 5% based on our aggregate benchmark results.

Primary details

Comparing Core i7-3820 and Xeon E3-1275 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking15021549
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation2.321.08
Market segmentDesktop processorServer
Power efficiency2.643.46
Architecture codenameSandy Bridge-E (2011−2013)Sandy Bridge (2011−2013)
Release dateFebruary 2012 (12 years ago)3 April 2011 (13 years ago)
Launch price (MSRP)$400$450

Cost-effectiveness evaluation

Performance per price, higher is better.

i7-3820 has 115% better value for money than Xeon E3-1275.

Detailed specifications

Core i7-3820 and Xeon E3-1275 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)4 (Quad-Core)
Threads88
Base clock speed3.6 GHz3.4 GHz
Boost clock speed3.8 GHz3.8 GHz
Bus rate5 GT/sno data
L1 cache64 KB (per core)64 KB (per core)
L2 cache256 KB (per core)256 KB (per core)
L3 cache10240 KB (shared)8 MB (shared)
Chip lithography32 nm32 nm
Die size294 mm2216 mm2
Maximum core temperatureno data73 °C
Maximum case temperature (TCase)67 °Cno data
Number of transistors1270 million1,160 million
64 bit support++
Windows 11 compatibility--

Compatibility

Information on Core i7-3820 and Xeon E3-1275 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
SocketFCLGA2011LGA1155
Power consumption (TDP)130 Watt95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-3820 and Xeon E3-1275. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.2, Intel® AVXIntel® SSE4.1, Intel® SSE4.2, Intel® AVX
AES-NI++
AVX++
Enhanced SpeedStep (EIST)++
Turbo Boost Technology2.02.0
Hyper-Threading Technology++
Idle States++
Thermal Monitoring++
Flex Memory Accessno data+
Smart Response+no data
Demand Based Switching-+
FDIno data+
Fast Memory Accessno data+

Security technologies

Core i7-3820 and Xeon E3-1275 technologies aimed at improving security, for example, by protecting against hacks.

TXT-+
EDB++
Identity Protection++

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-3820 and Xeon E3-1275 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-3820 and Xeon E3-1275. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR3
Maximum memory size64.23 GB32 GB
Max memory channels42
Maximum memory bandwidth51.2 GB/s21 GB/s
ECC memory support-+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataIntel HD P3000
Quick Sync Video-+
Clear Video HDno data+
Graphics max frequencyno data1.35 GHz
InTru 3Dno data+

Graphics interfaces

Available interfaces and connections of Core i7-3820 and Xeon E3-1275 integrated GPUs.

Number of displays supportedno data2

Peripherals

Specifications and connection of peripherals supported by Core i7-3820 and Xeon E3-1275.

PCIe version2.02.0
PCI Express lanes4020

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.

i7-3820 3.63
+4.6%
Xeon E3-1275 3.47

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.

i7-3820 5773
+4.7%
Xeon E3-1275 5516

Gaming performance

Pros & cons summary


Performance score 3.63 3.47
Power consumption (TDP) 130 Watt 95 Watt

i7-3820 has a 4.6% higher aggregate performance score.

Xeon E3-1275, on the other hand, has 36.8% lower power consumption.

Given the minimal performance differences, no clear winner can be declared between Core i7-3820 and Xeon E3-1275.

Note that Core i7-3820 is a desktop processor while Xeon E3-1275 is a server/workstation one.


Should you still have questions on choice between Core i7-3820 and Xeon E3-1275, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.


Intel Core i7-3820
Core i7-3820
Intel Xeon E3-1275
Xeon E3-1275

Similar processor comparisons

We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.

Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


3.7 326 votes

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Questions & comments

Here you can ask a question about Core i7-3820 or Xeon E3-1275, agree or disagree with our judgements, or report an error or mismatch.