To bring life to an old thread, another person stated low benchmarks due to not having the battery attached, which could also happen if the battery is low. Appears this is due to having a 65-watt power adapter, which cannot provide enough power on it's own, resulting in under-clocking. Solution is to make sure the battery is full or use a 90-watt adapter. That and using a gtx760 is overkill for an egpu due to the restricted bandwidth - lower end cards are supposedly more efficient. Also Lenovo just released a new bios which may improve the performance, and if so, please confirm for other x230 owners.