diff --git a/radio/src/targets/horus/telemetry_driver.cpp b/radio/src/targets/horus/telemetry_driver.cpp
index 1beadee7b..baf41346f 100644
--- a/radio/src/targets/horus/telemetry_driver.cpp
+++ b/radio/src/targets/horus/telemetry_driver.cpp
@@ -65,12 +65,14 @@ void telemetryPortInit(uint32_t baudrate, uint8_t mode)
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
   GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
   GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
-  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
+  GPIO_InitStructure.GPIO_Speed = baudrate <= 400000 ? GPIO_Speed_2MHz : GPIO_Speed_25MHz;
   GPIO_Init(TELEMETRY_GPIO, &GPIO_InitStructure);
 
   telemetryInitDirPin();
 
-  USART_OverSampling8Cmd(TELEMETRY_USART, ENABLE);
+  USART_DeInit(TELEMETRY_USART);
+
+  USART_OverSampling8Cmd(TELEMETRY_USART, baudrate <= 400000 ? DISABLE : ENABLE);
   
   USART_InitStructure.USART_BaudRate = baudrate;
   if (mode & TELEMETRY_SERIAL_8E2) {
diff --git a/radio/src/targets/taranis/telemetry_driver.cpp b/radio/src/targets/taranis/telemetry_driver.cpp
index feb8e57bf..c888aa79a 100644
--- a/radio/src/targets/taranis/telemetry_driver.cpp
+++ b/radio/src/targets/taranis/telemetry_driver.cpp
@@ -57,14 +57,14 @@ void telemetryPortInit(uint32_t baudrate, uint8_t mode)
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
   GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
   GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
-  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
+  GPIO_InitStructure.GPIO_Speed = baudrate <= 400000 ? GPIO_Speed_2MHz : GPIO_Speed_25MHz;
   GPIO_Init(TELEMETRY_GPIO, &GPIO_InitStructure);
 
   telemetryInitDirPin();
 
   USART_DeInit(TELEMETRY_USART);
   
-  USART_OverSampling8Cmd(TELEMETRY_USART, ENABLE);
+  USART_OverSampling8Cmd(TELEMETRY_USART, baudrate <= 400000 ? DISABLE : ENABLE);
   
   USART_InitTypeDef USART_InitStructure;
   USART_InitStructure.USART_BaudRate = baudrate;