https://rog.asus.com/forum/showthread.php?90037-Can-I-upgrade-the-CPU-or-GPU-in-my-ROG-Notebook-***-...GL553 is not on this list but I'm guessing it's the next iteration of GL552. Meaning that CPU and GPU are embedded BGA packages - soldered directly onto the mainboard.
GL553 specs (HM175 chipset, HQ processor, "NVIDIA", soldered RAM) suggests that it's a machine designed for value gaming, not for upgradable powergaming.
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