In order for you to play Ragnarok Online on Windows with minimal graphics settings, your computer must meet the following requirements
Operating System:
Windows-based (with administrative ability to install and patch)
Processor (CPU):
Pentium II, 400MHz (or better)
Memory (RAM):
128 MB RAM
Graphics Card:
Any with 3D Acceleration & at least 16MB on-board RAM
DirectX:
Version 8.1
Storage:
2 GB available space
Sound Card:
DirectSound (or compatible with 3D Sound Effect Support)
In order to play Ragnarok Online on Windows with maximum graphics settings, you need a computer with a configuration no worse than the following
OS *:
Windows 7
Processor (CPU):
Pentium Dual Core or Better
Memory (RAM):
2 GB RAM
Graphics Card:
Nvidia GeForce 8000 or better
DirectX:
Version 8.1
Network:
Broadband Internet connection
Storage:
3 GB available space
Sound Card:
DirectSound (or compatible with 3D Sound Effect Support)