diff --git a/configs/nucleus2g/nsh/defconfig b/configs/nucleus2g/nsh/defconfig
index baf7b77f1da..d53b70a3eca 100755
--- a/configs/nucleus2g/nsh/defconfig
+++ b/configs/nucleus2g/nsh/defconfig
@@ -76,7 +76,7 @@ CONFIG_ARCH_CHIP=lpc17xx
 CONFIG_ARCH_CHIP_LPC1768=y
 CONFIG_ARCH_BOARD=nucleus2g
 CONFIG_ARCH_BOARD_NUCLEUS2G=y
-CONFIG_BOARD_LOOPSPERMSEC=5483
+CONFIG_BOARD_LOOPSPERMSEC=7982
 CONFIG_DRAM_SIZE=(32*1024)
 CONFIG_DRAM_START=0x10000000
 CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)
diff --git a/configs/nucleus2g/ostest/defconfig b/configs/nucleus2g/ostest/defconfig
index 59dc6392c38..2d69e5a87c7 100755
--- a/configs/nucleus2g/ostest/defconfig
+++ b/configs/nucleus2g/ostest/defconfig
@@ -76,7 +76,7 @@ CONFIG_ARCH_CHIP=lpc17xx
 CONFIG_ARCH_CHIP_LPC1768=y
 CONFIG_ARCH_BOARD=nucleus2g
 CONFIG_ARCH_BOARD_NUCLEUS2G=y
-CONFIG_BOARD_LOOPSPERMSEC=5483
+CONFIG_BOARD_LOOPSPERMSEC=7982
 CONFIG_DRAM_SIZE=(32*1024)
 CONFIG_DRAM_START=0x10000000
 CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)