diff --git a/board/phytec/phycore_imx8mp/Kconfig b/board/phytec/phycore_imx8mp/Kconfig
index 5ede39a..bdf9e97 100644
--- a/board/phytec/phycore_imx8mp/Kconfig
+++ b/board/phytec/phycore_imx8mp/Kconfig
@@ -52,13 +52,32 @@
 
 endchoice
 
+config PHYCORE_IMX8MP_RAM_FREQ_FIX
+	bool "Set phyCORE-i.MX8MP RAM frequency fix instead of detecting"
+	default false
+	help
+	  RAM frequency is automatic being detected with the help of
+	  the EEPROM introspection data. Set RAM frequency to a fix value
+	  instead.
+
+choice
+	prompt "phyCORE-i.MX8MP RAM frequency"
+	depends on PHYCORE_IMX8MP_RAM_FREQ_FIX
+	default PHYCORE_IMX8MP_USE_1_5GHZ_RAM_TIMINGS
+
 config PHYCORE_IMX8MP_USE_2GHZ_RAM_TIMINGS
 	bool "Use 2GHz RAM timings"
-	depends on PHYCORE_IMX8MP_RAM_SIZE_FIX
-	default false
 	help
 	  Use fix 2GHz RAM timings for phyCORE-i.MX8MP instead of
 	  1.5GHz timings.
 
+config PHYCORE_IMX8MP_USE_1_5GHZ_RAM_TIMINGS
+	depends on !PHYCORE_IMX8MP_RAM_SIZE_8GB
+	bool "Use 1.5GHz RAM timings"
+	help
+	  Use fix 1.5GHz RAM timings for phyCORE-i.MX8MP instead of
+	  2GHz timings.
+endchoice
+
 source "board/phytec/common/Kconfig"
 endif
diff --git a/board/phytec/phycore_imx8mp/spl.c b/board/phytec/phycore_imx8mp/spl.c
index 7fdb96f..0610d8b 100644
--- a/board/phytec/phycore_imx8mp/spl.c
+++ b/board/phytec/phycore_imx8mp/spl.c
@@ -65,11 +65,21 @@
 			size = PHYTEC_IMX8MP_DDR_4GB;
 		else if (IS_ENABLED(CONFIG_PHYCORE_IMX8MP_RAM_SIZE_8GB))
 			size = PHYTEC_IMX8MP_DDR_8GB;
+	} else {
+		size = phytec_get_imx8m_ddr_size(NULL);
+	}
+
+	if (IS_ENABLED(CONFIG_PHYCORE_IMX8MP_RAM_FREQ_FIX)) {
 		if (IS_ENABLED(CONFIG_PHYCORE_IMX8MP_USE_2GHZ_RAM_TIMINGS)) {
 			if (size == PHYTEC_IMX8MP_DDR_4GB)
 				size = PHYTEC_IMX8MP_DDR_4GB_2GHZ;
 			else
 				use_2ghz_timings = true;
+		} else if (IS_ENABLED(CONFIG_PHYCORE_IMX8MP_USE_1_5GHZ_RAM_TIMINGS)) {
+			if (size == PHYTEC_IMX8MP_DDR_4GB_2GHZ)
+				size = PHYTEC_IMX8MP_DDR_4GB;
+			else
+				use_2ghz_timings = false;
 		}
 	} else {
 		u8 rev = phytec_get_rev(NULL);
@@ -78,8 +88,6 @@
 		if (rev != PHYTEC_EEPROM_INVAL &&
 		    (rev >= 3 || (somtype == SOM_TYPE_PCL && rev >= 1)))
 			use_2ghz_timings = true;
-
-		size = phytec_get_imx8m_ddr_size(NULL);
 	}
 
 	switch (size) {