Okay, so I got Duke Nukem Forever yesterday, and started playing it late last night. With the default settings for my computer. 2.53 GHz Intel Core 2 Duo 4GB DDR3 RAM 250GB HD 7200rpm Nvidia Geforce 9600M GT 512 MB vRAM It lags like hell. Literally. Even if I turn everything down to low and the screen resolution lower than default (1400x900) it still lags, especially in firefights. I have a habit of turning sync off but I am getting no where near 60 fps anyway, so capping it at 60 and straining the hardware to do so would be utterly pointless, to say the least. Also, it has a similar issue that World of Warcraft has been reported to have in Lion with most Nvidia cards (and some AMD card). I stopped playing WoW over a year or so ago so I cannot tell completely, but, if artifacts mean stuff bleeding through the walls and deformed models, then DNF also has this problem. When I switch the the Nvidia Geforce 9600M (256MB shared with ram) there is no artifacts but I am forced to keep everything on low to avoid the lag the game still suffers. In fact, it is exactly like World of Warcraft and Lion. So my question is, what is up? Is it that the Nvidia drivers are just not optimized for Lion yet? CS:S, DoD:S and HL2 are more stable in Lion on the 9600M GT (512MB) than they were in SL. No more kernel panics or anything but apparently WoW users are unable to use there dedicated cards and DNF also has the same problem. The artifacts are only the first issue. The performance is just horrible all around. The game is fun so far but the lag makes it almost completely annoying to play! I realize my processor is below recommended requirements. It fact it is only slightly faster than the minimal 2.4 GHz core 2 duo. But my ram and video are of recommended and my card (both of them) are listed as supported. My computer is a late 2008 15 inch MacBook Pro. Is it my processor? Amateur drivers for Lion? Thanks in advance. EDIT: Apparently the 9400M (9600M 256MB, whatever) is not supported but it DOES run and it doesn't give off artifacts like the ever much more powerful 9600M GT does.