Core 2 Duo E6400 vs Xeon E3-1240

Aggregate performance score

Xeon E3-1240
2011
4 cores / 8 threads, 80 Watt
3.40
+594%
Core 2 Duo E6400
2006
2 cores / 2 threads, 65 Watt
0.49

Xeon E3-1240 outperforms Core 2 Duo E6400 by a whopping 594% based on our aggregate benchmark results.

Primary details

Comparing Xeon E3-1240 and Core 2 Duo E6400 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking15542887
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation2.23no data
Market segmentServerDesktop processor
Power efficiency4.02no data
Architecture codenameSandy Bridge (2011−2013)Conroe (2006−2007)
Release date3 April 2011 (13 years ago)July 2006 (18 years ago)
Launch price (MSRP)$209no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Xeon E3-1240 and Core 2 Duo E6400 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)2 (Dual-core)
Threads82
Base clock speed3.3 GHz2.13 GHz
Boost clock speed3.7 GHz2.13 GHz
Bus rateno data1066 MHz
L1 cache64 KB (per core)64 KB
L2 cache256 KB (per core)2 MB
L3 cache8 MB (shared)0 KB
Chip lithography32 nm65 nm
Die size216 mm2143 mm2
Maximum core temperature69 °C61 °C
Number of transistors1,160 million291 million
64 bit support++
Windows 11 compatibility--
VID voltage rangeno data0.85V-1.5V

Compatibility

Information on Xeon E3-1240 and Core 2 Duo E6400 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
SocketLGA1155LGA775,PLGA775
Power consumption (TDP)80 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E3-1240 and Core 2 Duo E6400. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVXno data
AES-NI+-
AVX+-
Enhanced SpeedStep (EIST)++
Turbo Boost Technology2.0-
Hyper-Threading Technology+-
Idle States++
Thermal Monitoring++
Flex Memory Access+no data
Demand Based Switching+-
FDI-no data
Fast Memory Access+no data
FSB parityno data-

Security technologies

Xeon E3-1240 and Core 2 Duo E6400 technologies aimed at improving security, for example, by protecting against hacks.

TXT+-
EDB++
Identity Protection+-

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E3-1240 and Core 2 Duo E6400 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E3-1240 and Core 2 Duo E6400. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR1, DDR2, DDR3
Maximum memory size32 GBno data
Max memory channels2no data
Maximum memory bandwidth21 GB/sno data
ECC memory support+-

Peripherals

Specifications and connection of peripherals supported by Xeon E3-1240 and Core 2 Duo E6400.

PCIe version2.0no data
PCI Express lanes20no data

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 E3-1240 3.40
+594%
Core 2 Duo E6400 0.49

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 E3-1240 5403
+593%
Core 2 Duo E6400 780

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

Xeon E3-1240 554
+138%
Core 2 Duo E6400 233

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

Xeon E3-1240 1943
+420%
Core 2 Duo E6400 374

Gaming performance

Pros & cons summary


Performance score 3.40 0.49
Physical cores 4 2
Threads 8 2
Chip lithography 32 nm 65 nm
Power consumption (TDP) 80 Watt 65 Watt

Xeon E3-1240 has a 593.9% higher aggregate performance score, 100% more physical cores and 300% more threads, and a 103.1% more advanced lithography process.

Core 2 Duo E6400, on the other hand, has 23.1% lower power consumption.

The Xeon E3-1240 is our recommended choice as it beats the Core 2 Duo E6400 in performance tests.

Be aware that Xeon E3-1240 is a server/workstation processor while Core 2 Duo E6400 is a desktop one.


Should you still have questions on choice between Xeon E3-1240 and Core 2 Duo E6400, 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 Xeon E3-1240
Xeon E3-1240
Intel Core 2 Duo E6400
Core 2 Duo E6400

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.


4.3 171 vote

Rate Xeon E3-1240 on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
3.3 150 votes

Rate Core 2 Duo E6400 on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5

Questions & comments

Here you can ask a question about Xeon E3-1240 or Core 2 Duo E6400, agree or disagree with our judgements, or report an error or mismatch.