I have built my new custom computer using the processor: Intel i7 930 2.8GHz And I installed 12GB of memory. I like the new computer's performance in general. Quite a bit faster than my old one based on AMD Athlon 64 X2 (B) 4800+ 2.5 GHz. But I have 2 curiosity points about my new setup. I appreciate it that you hardware experts give me some clues. When I used the Windows Task Manager (Performance tab) to monitor the CPU usage, I saw 8 different "CPU Usage History" windows instead of 2 like on my old box. Where are there 8 of them? Is it proportional to the number of cores and hyper threading? What I saw was that the window #8 seemed to be over 60% to 70% busy all the time. But the other 7 windows - the CPU cycles are hardly used (under 10%). What is causing this lopsided CPU usage? I would imagine that the work would be more or less uniformly distributed among all cores. Does it mean the application has to support multi-core or hyper threading in order for the application to take advantage of all available processing power? One last thing: I have 12GB of physical memory. I verified that the Windows operating system (Vista Home) sees it. It did indicate 12GB total. But in this Performance tab, it seemed to only see a total of 2GB memory. Any idea what's going on there? A configuration mismatch somewhere?