diff --git a/target/linux/ramips/base-files/etc/board.d/02_network b/target/linux/ramips/base-files/etc/board.d/02_network
index 5d25cdba966..2c92a6a93b3 100755
--- a/target/linux/ramips/base-files/etc/board.d/02_network
+++ b/target/linux/ramips/base-files/etc/board.d/02_network
@@ -113,7 +113,8 @@ ramips_setup_interfaces()
 	vr500|\
 	wf-2881|\
 	whr-g300n|\
-	witi|\
+	mqmaker,witi-256m|\
+	mqmaker,witi-512m|\
 	wl-wn575a3|\
 	wndr3700v5|\
 	youku-yk1|\
diff --git a/target/linux/ramips/base-files/etc/diag.sh b/target/linux/ramips/base-files/etc/diag.sh
index d84bdff3a75..6a51778726a 100644
--- a/target/linux/ramips/base-files/etc/diag.sh
+++ b/target/linux/ramips/base-files/etc/diag.sh
@@ -279,7 +279,8 @@ get_status_led() {
 		status_led="$boardname:green:status"
 		;;
 	w306r-v20|\
-	witi|\
+	mqmaker,witi-256m|\
+	mqmaker,witi-512m|\
 	zbt-wr8305rt)
 		status_led="$boardname:green:sys"
 		;;
diff --git a/target/linux/ramips/base-files/lib/ramips.sh b/target/linux/ramips/base-files/lib/ramips.sh
index 75474fbc6d0..8c151552dca 100755
--- a/target/linux/ramips/base-files/lib/ramips.sh
+++ b/target/linux/ramips/base-files/lib/ramips.sh
@@ -577,9 +577,6 @@ ramips_board_detect() {
 	*"WHR-G300N")
 		name="whr-g300n"
 		;;
-	*"WiTi")
-                name="witi"
-		;;
 	*"WIZARD 8800")
 		name="wizard8800"
 		;;
diff --git a/target/linux/ramips/base-files/lib/upgrade/platform.sh b/target/linux/ramips/base-files/lib/upgrade/platform.sh
index ff73d6474b8..e90b560731a 100755
--- a/target/linux/ramips/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ramips/base-files/lib/upgrade/platform.sh
@@ -173,7 +173,8 @@ platform_check_image() {
 	whr-g300n|\
 	widora,neo-16m|\
 	widora,neo-32m|\
-	witi|\
+	mqmaker,witi-256m|\
+	mqmaker,witi-512m|\
 	wizfi630a|\
 	wl-330n|\
 	wl-330n3g|\
diff --git a/target/linux/ramips/base-files/sbin/fixup-mac-address b/target/linux/ramips/base-files/sbin/fixup-mac-address
index 98264c082e7..309db8ce45d 100755
--- a/target/linux/ramips/base-files/sbin/fixup-mac-address
+++ b/target/linux/ramips/base-files/sbin/fixup-mac-address
@@ -9,7 +9,8 @@ YES=
 
 board=$(board_name)
 case $board in
-	witi)
+	mqmaker,witi-256m|\
+	mqmaker,witi-512m)
 		partname=factory
 		offset=$((0xe000))
 	;;
diff --git a/target/linux/ramips/dts/WITI-256M.dts b/target/linux/ramips/dts/WITI-256M.dts
new file mode 100644
index 00000000000..4c12d8c3b5b
--- /dev/null
+++ b/target/linux/ramips/dts/WITI-256M.dts
@@ -0,0 +1,13 @@
+/dts-v1/;
+
+#include "WITI.dtsi"
+
+/ {
+	compatible = "mqmaker,witi-256m", "mqmaker,witi", "mediatek,mt7621-soc";
+	model = "MQmaker WiTi (256MB RAM)";
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x10000000>;
+	};
+};
diff --git a/target/linux/ramips/dts/WITI-512M.dts b/target/linux/ramips/dts/WITI-512M.dts
new file mode 100644
index 00000000000..b2490755340
--- /dev/null
+++ b/target/linux/ramips/dts/WITI-512M.dts
@@ -0,0 +1,13 @@
+/dts-v1/;
+
+#include "WITI.dtsi"
+
+/ {
+	compatible = "mqmaker,witi-512m", "mqmaker,witi", "mediatek,mt7621-soc";
+	model = "MQmaker WiTi (512MB RAM)";
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x1c000000>, <0x20000000 0x4000000>;
+	};
+};
diff --git a/target/linux/ramips/dts/WITI.dts b/target/linux/ramips/dts/WITI.dtsi
similarity index 95%
rename from target/linux/ramips/dts/WITI.dts
rename to target/linux/ramips/dts/WITI.dtsi
index 097c8163ff2..767ea03ff0b 100644
--- a/target/linux/ramips/dts/WITI.dts
+++ b/target/linux/ramips/dts/WITI.dtsi
@@ -7,12 +7,6 @@
 
 / {
 	compatible = "mqmaker,witi", "mediatek,mt7621-soc";
-	model = "MQmaker WiTi";
-
-	memory@0 {
-		device_type = "memory";
-		reg = <0x0 0x10000000>;
-	};
 
 	chosen {
 		bootargs = "console=ttyS0,57600";
diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index d78175cf74d..b84b74a5b0f 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -310,15 +310,26 @@ define Device/wf-2881
 endef
 TARGET_DEVICES += wf-2881
 
-define Device/witi
-  DTS := WITI
+define Device/mqmaker_witi-256m
+  DTS := WITI-256M
   IMAGE_SIZE := $(ralink_default_fw_size_16M)
-  DEVICE_TITLE := MQmaker WiTi
+  DEVICE_TITLE := MQmaker WiTi (256MB RAM)
+  DEVICE_PACKAGES := \
+	kmod-ata-core kmod-ata-ahci kmod-mt76x2 kmod-sdhci-mt7620 kmod-usb3 \
+	kmod-usb-ledtrig-usbport wpad-mini
+  SUPPORTED_DEVICES += witi
+endef
+TARGET_DEVICES += mqmaker_witi-256m
+
+define Device/mqmaker_witi-512m
+  DTS := WITI-512M
+  IMAGE_SIZE := $(ralink_default_fw_size_16M)
+  DEVICE_TITLE := MQmaker WiTi (512MB RAM)
   DEVICE_PACKAGES := \
 	kmod-ata-core kmod-ata-ahci kmod-mt76x2 kmod-sdhci-mt7620 kmod-usb3 \
 	kmod-usb-ledtrig-usbport wpad-mini
 endef
-TARGET_DEVICES += witi
+TARGET_DEVICES += mqmaker_witi-512m
 
 define Device/wndr3700v5
   DTS := WNDR3700V5