FFT Accuracy Benchmark Results

See our accuracy benchmark methodology page for a description of how we measure FFT accuracy, as well as an explanation of what is plotted in the graphs below.

Since the FFT accuracy graphs exhibit a number of interesting features whose meaning may not be immediately obvious, you may also want to read our commentary on the results.

Our list of FFTs in the benchmark describes the full name and source corresponding to the abbreviated FFT labels in the plot legends.

• 1.06 GHz PowerPC 7447A, gcc-3.4
• 1.06 GHz PowerPC 7447A, gcc-4.0
• 1.266 GHz Pentium 3
• 1.45 GHz IBM POWER4, 32 bit mode
• 1.45 GHz IBM POWER4, 64 bit mode
• 1.5 GHz UltraSPARC IIIi
• 1.6 GHz Pentium M (Banias), GNU compilers
• 1.6 GHz Pentium M (Banias), Intel compilers
• 1.65 GHz IBM POWER5, 32 bit mode
• 1.65 GHz IBM POWER5, 64 bit mode
• 2 GHz PowerPC 970 (G5), 32 bit mode, gcc-3.4
• 2 GHz PowerPC 970 (G5), 32 bit mode, gcc-4.0
• 2 GHz PowerPC 970 (G5), 64 bit mode, gcc-3.4
• 2 GHz PowerPC 970 (G5), 64 bit mode, gcc-4.0
• 2 GHz PowerPC 970 (G5), MacOSX, 32 bit mode, gcc-3.3
• 2.2 GHz Dual Core AMD Opteron Processor 275, 32-bit mode
• 2.2 GHz Dual Core AMD Opteron Processor 275, 64-bit mode
• 2.4 GHz Pentium 4, GNU compilers
• 2.4 GHz Pentium 4, Intel compilers
• 3.0 GHz Intel Core Duo, Intel compilers, 32-bit mode
• 3.0 GHz Intel Core Duo, Intel compilers, 64-bit mode
• 3.06 GHz Pentium 4
• 3.1 GHz Intel Xeon E3-1220v3
• 3.6 GHz AMD Ryzen 7 1800X
• 3.60 GHz Pentium 4, Intel compilers, EM64T mode