At the moment I have a 400 part space station that I get 10 FPS on. Info about my computer: OS: Windows 7 base - upgraded to Windows 7 ultimate CPU: AMD Phenom II X6 1100T BE GPU: XFX Radeon HD 6870 1 GB GDDR5 ram system ram: 8GB ( only 4 usable for game though ) MB: Gigabyte M68MT-S2P Sounds card: Creative sound blaster Audigy SE, 24 bit Add ons I currently use: KW Rocketry Squad Texture Reduction Pack 0.1c – Update [0.23] Kerbal Engineer Redux v0.6.2.3 [0.23] BioMass – Renewable Bio-Fuel Modules [0.23.5] RCS Sounds Kerbal Joint Reinforcement v2.3 UbioZur Welding Ltd [0.23.X] Astronomer’s Visual Pack V3 ALPHA [0.23] KERBAL NRAP v1.3 – Adjustable test weight for lifter building HyperEdit and which ever version of mechjeb is the latest working version.