我在国外网站找到这么一段:
SLI basically combines 2 (or more) matched GPU devices into 1 logical GPU device. When in SLI mode, the system sees only 1 logical GPU and unfortunately for CUDA this means that it only has visibility to 1 physical device (not 2, 3 or 4). Disabling SLI mode for CUDA is best because it allows SETI to take advantage of each GPU as its own device.