diff --git a/arch/arm/mach-rk30/clock_data-rk3066b.c b/arch/arm/mach-rk30/clock_data-rk3066b.c
index e5f9e8119628..81342c64e992 100644
--- a/arch/arm/mach-rk30/clock_data-rk3066b.c
+++ b/arch/arm/mach-rk30/clock_data-rk3066b.c
@@ -3083,7 +3083,7 @@ static void __init rk30_clock_common_init(unsigned long gpll_rate, unsigned long
 	clk_set_rate_nolock(&codec_pll_clk, cpll_rate);
 
 	cpu_axi_init();
-	clk_set_rate_nolock(&clk_core, 816 * MHZ);
+	clk_set_rate_nolock(&clk_core, 312 * MHZ);
 	//periph clk
 	periph_clk_set_init();