Speaking of things that don't matter much, Nvidia has decided to scale back the GTX 780's capacity for double-precision floating-point math. Double-precision support is built into the GK110 GPU because of the chip's compute-focused role aboard Nvidia's Tesla products. Real-time graphics basically don't require that level of precision. The Titan offers the GK110's full DP performance, so it can be used for scientific computing and other non-graphics compute applications. On the GTX 780, DP math executes at 1/24th the rate of single-precision math, just enough to maintain compatibility without truly being useful.