I have the laptop in the title (C55-C5241).
I want to play video games like Crysis 3, Witcher 3 and others but my GPU is integrated and I can't play.
My question is can I use some of the external gpu brick, for example Alienware Amplifier, The Razer Core, MSI docking station or asus rog gx2.
I don't want something crazy like GTX Titan X or something high-end, I want something like Radeon R9 380 and that is about it.
The answer is yes you can definitely use your laptop with an external GPU like those you've exampled.
Here's one sample (Asus Rog GX2):
In this video I watched he said, he hopes the ASUS ROG GX2 to be open for other laptops, not just asus ones.
I hope ASUS ROG GX2 is unlocked and can connect to mine, if it can I will definitely buy one unit and after that GPU.
I don't know if ASUS has a statement on this.