miserable performance

typical adobe, no upgrade offer for LR5. if you want it you have to search a long time to get there for 79EUR, because all roads lead to CC.
but really annoying is the miserable, even slower performance than LR5 because Adobe has implemented the GPU approve Supports. My computer has an on-chip GPU and a NVIDA graphics card and Adobe chooses without notice for the on-chip graphics card and can be expected there. clear that everything is done slowly.
Adobe's solution to the problem is actually the "outrageous" answer, but shut down the on-chip GPU in the Device Manager. Yes you can, but impact on the system and other programs.

In short: who two graphics cards in the system, stay away!