I'd say that this is not possible both from technical and practical point of view. From the technical point of view graphic technology used for ED most probably would not allow this. From the practical point of view the first GPU supporting DX10 was GTX8800, which was released in Fall 2005, i.e. almost 10 years ago. GTX 260 listed in minimal requirements is more powerful than GTX8800. As well as there are quite a lot of GPUs supporting DX10 that does not cost much, and provide playable performance.