The max it can support is a 15 watt card which is very limited and it use's a mini PCI-E x1 slot which is an even more limited market.Sorry to say but I don't think you can upgrade it.
The max it can support is a 15 watt card which is very limited and it use's a mini PCI-E x1 slot which is an even more limited market.Sorry to say but I don't think you can upgrade it.