Complex sentence: In the early 1990s, the three co-founders hypothesized that the proper direction for the next wave of computing will be accelerated or graphics based computing and believed this model of computing could solve problems that general-purpose computing fundamentally couldn't.
Split into simpler sentences: In the early 1990s, the three co-founders hypothesized that the proper direction for the next wave of computing would be accelerated or graphics based computing. They believed that this model of computing could solve problems that general-purpose computing fundamentally couldn't.