CPU: AMD Phenom X4 9950BE @ 3.0 GHz RAM: 8GB DDR2-1066 Mobo: Asus M4A78 GPU: either of the following: Radeon 5770 or Radeon 5830 (I've got a few of each model kicking around for... reasons...) OS: Windows 8.1 The OS and portions of KSP are stored on an SSD (using mklink or SteamMover to keep only the important stuff, like /GameData/, on the SSD) and load times are negligible, no matter what mods I install. What I don't understand is the MASSIVE difference in performance between those 2 GPUs; The 5770 can barely draw KSC at 60FPS with nothing more than a command pod sitting on the launchpad, while the 5830 has no issues holding 60FPS anywhere, even with 200+ part monstrosities. The rest of the system doesn't change, and the 5830 should only be about 20% more powerful than the 5770... I've never had other games be so much "happier" with a 5830 over a 5770. Anyone have similar experience?