The T7200 is a single processor with two cores inside. What this means is that there is a single chip plugged into the motherboard however inside of that chip there are two processor "engines" running. As the last post indicated, these two "engines" share a common bus and a cache but otherwise they operate independently of each other. To double check that both are working, bring up the "Windows Task Manager" (Ctrl-Shift-Esc should bring it up) and ensure that when the "Performance" tab is showing that it shows two graphs labeled "CPU Usage History". If there is just one graph, then somehow one of them is disabled and you need to check with HP on how to enable it again.
I've not used CPU-Control and recommend that you not try to adjust the CPU load manually. Windows does a very good job on its own. Use the "Windows Task Manager" to determine if the CPU load is hitting 100% for both cores.
From what you've described it looks like you have a very graphics intensive application running on a laptop. You need to optimize how the application uses the video features of your laptop and ensure that some of the power saving features are adjusted for best performance. Here is what I would do:
- In the control panel "Power Options", change the settings to "High Performance". Note that this will give you less battery life than the other options. The laptop processors have the ability to run at lower frequencies when needed to minimize power use at the cost of performance. Windows should automatically kick this up to a higher frequency when needed but just to be sure, "High Performance" forces it to run at a higher frequency all the time.
- Make sure you have the latest video drivers from NVidea for your NVidia video card. Don't use the drivers from Microsoft.
- In the control panel Personalization "Display Settings" make sure that hardware acceleration is turned on. I'm not personally familiar with the options of the NVidea 7400 card but generally there is a slider control that allows various degrees of hardware acceleration. Turn it on as much as you can. By doing this you allow the video card to do more of the processing freeing up the CPU to do other things, like play your music.
- You didn't say how much video memory your NVidia 7400 card has. 2nd Life is very demanding and can benefit from lots of video memory. Add more if you can.
Hope this helps. Enjoy!
Lester Memmott