diff --git a/configs/amber/hello/defconfig b/configs/amber/hello/defconfig
index 6cdec3571aa..7bf357a5734 100644
--- a/configs/amber/hello/defconfig
+++ b/configs/amber/hello/defconfig
@@ -80,6 +80,7 @@ CONFIG_ARCH_CHIP_ATMEGA128=y
 CONFIG_ARCH_BOARD=amber
 CONFIG_ARCH_BOARD_AMBER=y
 CONFIG_BOARD_LOOPSPERMSEC=8079
+CONFIG_BOARD_LOOPSPERMSEC=(8*100)
 CONFIG_DRAM_SIZE=(4*1024)
 CONFIG_DRAM_START=0x800000
 CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)
diff --git a/configs/amber/ostest/defconfig b/configs/amber/ostest/defconfig
index 73adc56bdf4..96c082cf67a 100644
--- a/configs/amber/ostest/defconfig
+++ b/configs/amber/ostest/defconfig
@@ -79,7 +79,7 @@ CONFIG_ARCH_CHIP=atmega
 CONFIG_ARCH_CHIP_ATMEGA128=y
 CONFIG_ARCH_BOARD=amber
 CONFIG_ARCH_BOARD_AMBER=y
-CONFIG_BOARD_LOOPSPERMSEC=8079
+CONFIG_BOARD_LOOPSPERMSEC=(8*100)
 CONFIG_DRAM_SIZE=(4*1024)
 CONFIG_DRAM_START=0x800000
 CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)
diff --git a/configs/micropendous3/hello/defconfig b/configs/micropendous3/hello/defconfig
index 4b249665fd5..b2b3454ef80 100644
--- a/configs/micropendous3/hello/defconfig
+++ b/configs/micropendous3/hello/defconfig
@@ -79,7 +79,7 @@ CONFIG_ARCH_CHIP=at90usb
 CONFIG_ARCH_CHIP_AT90USB647=y
 CONFIG_ARCH_BOARD=micropendous3
 CONFIG_ARCH_BOARD_MICROPENDOUS3=y
-CONFIG_BOARD_LOOPSPERMSEC=8079
+CONFIG_BOARD_LOOPSPERMSEC=(8*108)
 CONFIG_DRAM_SIZE=(4*1024)
 CONFIG_DRAM_START=0x800000
 CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)
diff --git a/configs/micropendous3/ostest/defconfig b/configs/micropendous3/ostest/defconfig
index a370b9661af..e3d69b85bb7 100644
--- a/configs/micropendous3/ostest/defconfig
+++ b/configs/micropendous3/ostest/defconfig
@@ -79,7 +79,7 @@ CONFIG_ARCH_CHIP=at90usb
 CONFIG_ARCH_CHIP_AT90USB647=y
 CONFIG_ARCH_BOARD=micropendous3
 CONFIG_ARCH_BOARD_MICROPENDOUS3=y
-CONFIG_BOARD_LOOPSPERMSEC=8079
+CONFIG_BOARD_LOOPSPERMSEC=(8*108)
 CONFIG_DRAM_SIZE=(4*1024)
 CONFIG_DRAM_START=0x800000
 CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)