As the title suggests, I have to replace the fans because they become too noisy. However, there are both 5 Volt and 12 Volt spare parts for the same G731GT model. In fact, the seller asks to be careful in purchasing the right voltage. (see attached) Is there the possibility of knowing before opening the laptop which voltage I have to buy, perhaps from the laptop's code or from Windows, or through a program such as Everest or Aida64? Thanks for any replies.