diff --git a/src/board/system76/galp3-c/battery.c b/src/board/system76/galp3-c/battery.c
index 5acb2c0..1a3e9ce 100644
--- a/src/board/system76/galp3-c/battery.c
+++ b/src/board/system76/galp3-c/battery.c
@@ -9,8 +9,8 @@ uint8_t smbus_read(uint8_t address, uint8_t command, uint16_t * data) {
     // Clear result
     HOSTAA = HOSTAA;
 
-    // Clock down to 50 KHz
-    SCLKTSA = 1;
+    // Clock to 400 KHz
+    SCLKTSA = 3;
 
     // Enable host interface
     HOCTL2A = 1 << 0;
@@ -54,8 +54,8 @@ uint8_t smbus_write(uint8_t address, uint8_t command, uint16_t data) {
     // Clear result
     HOSTAA = HOSTAA;
 
-    // Clock down to 50 KHz
-    SCLKTSA = 1;
+    // Clock to 400 KHz
+    SCLKTSA = 3;
 
     // Enable host interface
     HOCTL2A = 1 << 0;
diff --git a/src/board/system76/galp3-c/stdio.c b/src/board/system76/galp3-c/stdio.c
index 4d42926..b2f53bb 100644
--- a/src/board/system76/galp3-c/stdio.c
+++ b/src/board/system76/galp3-c/stdio.c
@@ -10,8 +10,8 @@ void i2c_write(unsigned char value) {
         // Clear result
         HOSTAA = HOSTAA;
 
-        // Clock down to 50 KHz
-        SCLKTSA = 1;
+        // Clock to 400 KHz
+        SCLKTSA = 3;
 
         // Enable host interface with i2c compatibility
         HOCTL2A = (1 << 1) | (1 << 0);