diff --git a/src/firmware/link.x b/src/firmware/link.x
index 1f148a8..182955b 100644
--- a/src/firmware/link.x
+++ b/src/firmware/link.x
@@ -51,15 +51,12 @@ SECTIONS
         __heap0_start = .;
         . += 0x8000000;
         __heap0_end = .;
-        __heap1_start = .;
-        . += 0x8000000;
-        __heap1_end = .;
     } > SDRAM
 
     .stack1 (NOLOAD) : ALIGN(8)
     {
         __stack1_end = .;
-        . += 0x1000000;
+        . += 0x2000;
         __stack1_start = .;
     } > SDRAM
 
diff --git a/src/firmware/src/main.rs b/src/firmware/src/main.rs
index ea0bcde..02c3323 100644
--- a/src/firmware/src/main.rs
+++ b/src/firmware/src/main.rs
@@ -64,7 +64,7 @@ fn identifier_read(buf: &mut [u8]) -> &str {
 }
 
 
-const BUFFER_SIZE: usize = 16*1024*1024;
+const BUFFER_SIZE: usize = 300*1024*1024;
 
 #[repr(C, align(128))]
 struct DmaBuffer {