diff --git a/server/TracyView.cpp b/server/TracyView.cpp
index 4ed853f0..e0021eb3 100644
--- a/server/TracyView.cpp
+++ b/server/TracyView.cpp
@@ -3995,7 +3995,17 @@ int View::DrawCpuData( int offset, double pxns, const ImVec2& wpos, bool hover,
 
                     char buf[32];
                     sprintf( buf, "CPU %i", i );
+                    const auto txtx = ImGui::CalcTextSize( buf ).x;
                     DrawTextContrast( draw, wpos + ImVec2( ty, offset-1 ), 0xFFDD88DD, buf );
+                    if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( 0, offset-1 ), wpos + ImVec2( sty + txtx, offset + sty - 1 ) ) )
+                    {
+                        ImGui::PopFont();
+                        ImGui::BeginTooltip();
+                        TextFocused( "CPU:", RealToString( i, true ) );
+                        TextFocused( "Context switch regions:", RealToString( cs.size(), true ) );
+                        ImGui::EndTooltip();
+                        ImGui::PushFont( m_smallFont );
+                    }
                 }
                 offset += sstep;
             }