diff --git a/src/link/stm32_flash_g474.ld b/src/link/stm32_flash_g474.ld
index c5fcc1d8d..2635809dd 100644
--- a/src/link/stm32_flash_g474.ld
+++ b/src/link/stm32_flash_g474.ld
@@ -20,9 +20,14 @@ MEMORY
 
 
     SYSTEM_MEMORY (r) : ORIGIN = 0x1FFF0000, LENGTH = 64K
-
-    RAM (xrw)         : ORIGIN = 0x20000000, LENGTH = 96K
-    CCM (xrw)         : ORIGIN = 0x20018000, LENGTH = 32K
+/* Below are the true lengths for normal and close coupled RAM
+ *    RAM (xrw)         : ORIGIN = 0x20000000, LENGTH = 96K
+ *    CCM (xrw)         : ORIGIN = 0x20018000, LENGTH = 32K
+ * Allow normal RAM overflow to occupy start of CCM, and only reserve 2560 bytes for  vector table and stack in CCM
+ * CCM is aligned to a 512 byte boundary
+ */
+    RAM (xrw)         : ORIGIN = 0x20000000, LENGTH = 128512
+    CCM (xrw)         : ORIGIN = 0x2001F600, LENGTH = 2560
     MEMORY_B1 (rx)    : ORIGIN = 0x60000000, LENGTH = 0K
 }