diff --git a/CPU-optimizations-build-options.md b/CPU-optimizations-build-options.md
index b4ef0f0..359e123 100644
--- a/CPU-optimizations-build-options.md
+++ b/CPU-optimizations-build-options.md
@@ -8,9 +8,11 @@ OpenCV goal is to provide effective processors support, including separate optim
 Some OpenCV functions contains multiple code paths specialized for different processors features / instruction sets.
 Selection of executed code path is based on auto-detection of available processor features.
 
-### CMake options
+**Note**: Build options described here don't control behavior of CPU-based optimizations from Intel® Integrated Performance Primitives (Intel® IPP, https://software.intel.com/en-us/intel-ipp).
 
-These options are available since OpenCV <next release>.
+### Customizing CMake options
+
+These options are available since OpenCV 3.3 (released in Aug 2017).
 
 Build options allow to specify **minimal** and **dispatched** optimization features sets:
 
@@ -18,6 +20,8 @@ Build options allow to specify **minimal** and **dispatched** optimization featu
 
 * **Dispatched** optimizations are additional code paths compiled into executable. They will be executed on supported processors only.
 
+By default, OpenCV on x86_64 uses SSE3 as basic instruction set and enables dispatched optimizations for SSE4.2, AVX, AVX2 instruction sets. This configuration provides the best effort on wide range of users platforms.
+
 OpenCV uses these CMake variables to control supported optimization features:
 
 * `CPU_BASELINE` - **minimal** set of required optimizations (if they are supported by C++ compiler)