As mentioned in a previous post, I use the following WarpSpeed settings: BUS 13 x 20 = 260 MHz CPU:BUS x 4 / 2 = 520 MHz In other words I bump up the CPU one notch and the Bus up 4 notches. Raspabalsa - you had questioned (rightfully so) the difference or necessity to set the bus speed up versus just simply running the CPU speed up two notches (to 520 MHz). I thought about it, and so I decided to instead only bump the CPU speed up (leaving bus speed at factory norm): In WarpSpeed I use the following settings: BUS 13 x 16 = 208 MHz CPU:BUS x 5 / 2 = 520 MHz Using those settings for a few days I noticed quite a bit of instability. I guess the most blaring problem was in PTunes. When I go to bed I will often have the TX play soft music for like 90 minutes or so. During the period when I was using these new settings, I noticed PTunes freezing up - sort of like when an Intellivision or Commodore 64 would freeze up, and the last note of sound would keep playing. It was kind of creepy waking up at 3AM to some awful noise and it was the TX frozen. So I guess on some TX's it does make a difference. At least from the standpoint of how fast the TX CPU can go before instability sets in. I know there are TX's out there that can handle a CPU speed of 600+MHz. I have a spare TX. I will get WarpSpeed installed on that and see how it performs. (something I was meaning to do, anyway). I guess it would also be interesting to try and perform some sort of calibrated speed tests. Something like watching a h.264 movie on CorePlayer and working with large PDF files. I'll try and play around with that this weekend.