Intel® Processor Graphics Xᵉ-LP API Developer and Optimization Guide
Using CPU SIMD
Using CPU SIMD instructions, either through the Intel® SPMD Program Compiler (Intel® ISPC) or C++
intrinsics, can provide a significant power and performance boost. These improvements can be
even bigger by using the latest instruction set.
However, on processorsprior , using AVX2 and particularly AVX512 SIMD instruction requires a
voltage increase in order to power the SIMD architecture block. In order to avoid power
increase, Intel Core processors will run at a lower frequency, which can decrease performance
for a mostly scalar workload with a few SIMD instructions. For this reason, sporadic AVX512
SIMD usage should be avoided on these older processors.