The Surface Laptop 4 for Business could be the version to get if you want a 13.5-inch model with an AMD Ryzen 7 4980U APU You do need to buy the 15-inch Surface Laptop 4 to get the AMD Ryzen 7 4980U. (Image source: Microsoft) Microsoft has restricted the smaller Surface Laptop 4 to the AMD Ryzen 5 4680U, but not if you buy the 'for Business' edition. Better still, the Surface Laptop 4 for Business version is also the cheapest way to get Microsoft's laptop with an 8-core processor, 16 GB of RAM and 512 GB of storage. Reviews, Internet of Things (IoT), iOS, Wearable, Ticker Microsoft announced the Surface Laptop 4 yesterday, as we reported. While the company has re-used the Surface Laptop 3's chassis, the Surface Laptop 4's processors are a big performance uplift over the ones found in the previous model. Unfortunately, Microsoft does not make it obvious that you can configure the 13.5-inch model with the Ryzen 7 4980U, arguably the most powerful processor option available on the Surface Laptop 4.