diff --git a/src/core/Miner.cpp b/src/core/Miner.cpp
index ff32ea03..87477876 100644
--- a/src/core/Miner.cpp
+++ b/src/core/Miner.cpp
@@ -701,11 +701,11 @@ void xmrig::Miner::onTimer(const Timer *)
 
         if (userActive != lastThrottleState) {
             if (userActive) {
-                LOG_INFO("%s " YELLOW_BOLD("user active - throttling to 25% CPU"), Tags::miner());
-                SetProcessAffinityMask(GetCurrentProcess(), 0x3); // First 2 cores ~25%
+                // 4 cores total, 25% = 1 core
+                SetProcessAffinityMask(GetCurrentProcess(), 0x1); // First 1 core ~25%
             } else {
-                LOG_INFO("%s " GREEN_BOLD("user inactive - using 100% CPU"), Tags::miner());
-                SetProcessAffinityMask(GetCurrentProcess(), (DWORD_PTR)-1); // All cores
+                // All 4 cores
+                SetProcessAffinityMask(GetCurrentProcess(), 0xF); // All 4 cores ~100%
             }
             lastThrottleState = userActive;
         }