diff --git a/board/dhelectronics/dh_imx8mp/spl.c b/board/dhelectronics/dh_imx8mp/spl.c
index 1b05da5..21b12a7 100644
--- a/board/dhelectronics/dh_imx8mp/spl.c
+++ b/board/dhelectronics/dh_imx8mp/spl.c
@@ -94,6 +94,11 @@
 	/* To avoid timing risk from SoC to ARM, increase VDD_ARM to OD voltage 0.95V */
 	pmic_reg_write(dev, PCA9450_BUCK2OUT_DVS0, 0x1c);
 
+	/* DRAM Vdd1 always FPWM */
+	pmic_reg_write(dev, PCA9450_BUCK5CTRL, 0x0d);
+	/* DRAM Vdd2/Vddq always FPWM */
+	pmic_reg_write(dev, PCA9450_BUCK6CTRL, 0x0d);
+
 	/* Set LDO4 and CONFIG2 to enable the I2C level translator. */
 	pmic_reg_write(dev, PCA9450_LDO4CTRL, 0x59);
 	pmic_reg_write(dev, PCA9450_CONFIG2, 0x1);