[other] Pentium D running as a Pentium 4

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http://ubuntuforums.org – I have just got a Pentium D 820 to replace me old P4. The pentium D is a 2.8GHz CPU. However in BIOS and CPUZ on windows it is showing a single core Pentium 4 running at 2.8GHz with hyper threading. In linux is is showing as 2 pentium 4 cpus at 2.8GHz but I don't know whether these are the 2 logical cores from hyperthreading or two real ones. I have an Abit IP-95 Motherboard. I am gonna try my other mobo, ECS P65T-A. See if that picks up both cores. If not what do you suggest. Both motherboards say on the box that they support Pentium D's. Also why is the computer getting the name wrong? Where does it get the CPU name from? Many thanks. Anthony edit: here is a screenshot of what CPUZ should look like. Also apparently the CPU doesn't support hyper threading at all. (Hardware)