Athlon X4 740 vs Xeon E5645

#ad 
Buy on Amazon
VS

Aggregate performance score

Xeon E5645
2010
6 cores / 12 threads, 80 Watt
3.18
+91.6%
Athlon X4 740
2012
4 cores / 4 threads, 65 Watt
1.66

Xeon E5645 outperforms Athlon X4 740 by an impressive 92% based on our aggregate benchmark results.

Primary details

Comparing Xeon E5645 and Athlon X4 740 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking16182078
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation1.38no data
Market segmentServerDesktop processor
Power efficiency3.762.42
Architecture codenameWestmere-EP (2010−2011)Trinity (2012−2013)
Release date16 March 2010 (14 years ago)2 October 2012 (12 years ago)
Launch price (MSRP)$294no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Xeon E5645 and Athlon X4 740 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)4 (Quad-Core)
Threads124
Base clock speed2.4 GHz3.2 GHz
Boost clock speed2.67 GHz3.7 GHz
L1 cache64 KB (per core)192K
L2 cache256 KB (per core)4 MB (shared)
L3 cache12 MB (shared)no data
Chip lithography32 nm32 nm
Die size239 mm2246 mm2
Maximum core temperature76 °Cno data
Maximum case temperature (TCase)no data74 °C
Number of transistors1,170 million1,303 million
64 bit support++
Windows 11 compatibility-no data

Compatibility

Information on Xeon E5645 and Athlon X4 740 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,LGA1366FM2
Power consumption (TDP)80 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5645 and Athlon X4 740. You'll probably need this information if you require some particular technology.

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

Security technologies

Xeon E5645 and Athlon X4 740 technologies aimed at improving security, for example, by protecting against hacks.

TXT+no data
EDB+no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5645 and Athlon X4 740 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5645 and Athlon X4 740. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR3-1866
Maximum memory size288 GBno data
Max memory channels3no data
Maximum memory bandwidth32 GB/sno data
ECC memory support+-

Peripherals

Specifications and connection of peripherals supported by Xeon E5645 and Athlon X4 740.

PCIe version2.02.0

Synthetic benchmark performance

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


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 E5645 3.18
+91.6%
Athlon X4 740 1.66

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 E5645 5048
+91.4%
Athlon X4 740 2638

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 E5645 372
Athlon X4 740 377
+1.3%

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 E5645 1842
+107%
Athlon X4 740 892

Gaming performance

Pros & cons summary


Performance score 3.18 1.66
Recency 16 March 2010 2 October 2012
Physical cores 6 4
Threads 12 4
Power consumption (TDP) 80 Watt 65 Watt

Xeon E5645 has a 91.6% higher aggregate performance score, and 50% more physical cores and 200% more threads.

Athlon X4 740, on the other hand, has an age advantage of 2 years, and 23.1% lower power consumption.

The Xeon E5645 is our recommended choice as it beats the Athlon X4 740 in performance tests.

Be aware that Xeon E5645 is a server/workstation processor while Athlon X4 740 is a desktop one.


Should you still have questions on choice between Xeon E5645 and Athlon X4 740, 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 E5645
Xeon E5645
AMD Athlon X4 740
Athlon X4 740

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.


4.1 58 votes

Rate Xeon E5645 on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
3.6 200 votes

Rate Athlon X4 740 on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5

Questions & comments

Here you can ask a question about Xeon E5645 or Athlon X4 740, agree or disagree with our judgements, or report an error or mismatch.