diff --git a/src/mainboard/asus/p8h61-m_pro/gpio.c b/src/mainboard/asus/p8h61-m_pro/gpio.c
index 1cf848f0b1..b1b819eca0 100644
--- a/src/mainboard/asus/p8h61-m_pro/gpio.c
+++ b/src/mainboard/asus/p8h61-m_pro/gpio.c
@@ -105,7 +105,7 @@ static const struct pch_gpio_set2 pch_gpio_set2_mode = {
 	.gpio43 = GPIO_MODE_NATIVE,
 	.gpio44 = GPIO_MODE_NATIVE,
 	.gpio45 = GPIO_MODE_NATIVE,
-	.gpio46 = GPIO_MODE_GPIO,
+	.gpio46 = GPIO_MODE_GPIO,   /* wired to GPU Boost switch */
 	.gpio47 = GPIO_MODE_NATIVE,
 	.gpio48 = GPIO_MODE_NATIVE,
 	.gpio49 = GPIO_MODE_GPIO,