AMD Athlon 64 FX-55 vs Intel Pentium D 940

General info

Comparing Athlon 64 FX-55 and Pentium D 940 processor market type (desktop or notebook), architecture and sales start time and price.
Place in performance rating
Value for money (0-100)
no data
Architecture codename
San Diego
Release date
October 2004
January 2006
Launch price (MSRP)
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Price now
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Technical specs

Athlon 64 FX-55 and Pentium D 940 quantitative parameters such as cores and threads number, clocks, manufacturing process, cache size and multiplier lock state. These parameters indirectly say of Athlon 64 FX-55 and Pentium D 940 performance, but for precise assessment you have to consider their test results.
Number of cores
Number of threads
Maximum frequency
2.6 GHz
3.2 GHz
L1 cache
128 KB
28 KB
L2 cache
1 MB
4 MB
Manufacturing process technology
130 nm
65 nm
Die size
193 mm2
140 mm2
Transistor count
114 million
376 million
64 bit support
VID voltage range
no data


Information on Athlon 64 FX-55 and Pentium D 940 compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one.
Max number of CPUs in a configuration
Power consumption (TDP)
104 Watt
130 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Athlon 64 FX-55 and Pentium D 940. You'll probably need this information if you require some particular technology.
Enhanced SpeedStep (EIST)
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Turbo Boost
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Idle States
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Demand Based Switching
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32 Bit
FSB parity
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Security technologies

Athlon 64 FX-55 and Pentium D 940 technologies aimed at raising security, for example, by protecting against hacks.
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Virtualization technologies

Virtual machine speed-up technologies supported by Athlon 64 FX-55 and Pentium D 940 are enumerated here.
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Memory specs

Types, maximum amount and channel number of RAM supported by Athlon 64 FX-55 and Pentium D 940.
Supported memory types
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Benchmark performance

Non-gaming benchmarks performance of Athlon 64 FX-55 and Pentium D 940. Overall benchmark performance is measured in points in 0-100 range.

Overall benchmark performance

Athlon 64 FX-55 0.78 +18.2%
Pentium D 940 0.66


Athlon 64 FX-55 622 +18.5%
Pentium D 940 525

Gaming performance

Let's see how good Athlon 64 FX-55 and Pentium D 940 are for gaming compared with game system requirements. Remember that sometimes official requirements may reflect real performance inaccurately.

Advantages of AMD Athlon 64 FX-55

18.2% faster in synthetic tests
Less power hungry (104 vs 130 watts)
3DNow! (older SIMD instructions set used by AMD CPUs. Supercedes MMX, works with 64-bit registers)
AMD64 (AMD CPUs 64-bit architecture. Almost identical to Intel 64, save for some little and rarely used nuances)

Advantages of Intel Pentium D 940

Higher maximum frequency (3200 vs 2600 MHz)
Finer manufacturing process technology (65 vs 130 nm)
Intel 64 (64-bit Intel CPU architecture. Almost identical to AMD64, except small and rarely used nuances)

So, Athlon 64 FX-55 or Pentium D 940?

Judging by the results of synthetic and gaming tests, Technical City recommends AMD Athlon 64 FX-55.
Should you still have questions on choice between Athlon 64 FX-55 and Pentium D 940, ask them in Comments section, and we shall answer.

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AMD Athlon 64 FX-55
Intel Pentium D 940

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