Dell stock could be about to shift into a higher gear.Investors in artificial intelligence (AI) can't seem to get enough of big tech companies in the "Magnificent Seven." Even other stocks in the sector such as Super Micro Computer, Broadcom, and Taiwan Semiconductor have started to emerge as more-mainstream choices in the AI realm.One stock that was once flying high but has since lost altitude during the past several months is computer maker and data-storage company Dell Technologies (DELL -1.54%). The com ...