Download: Process Explorerer
This tool should let you see both core at once. As you can see it is part of MS tools.
It is strange that you can not see both core in Task Manager by one graph pr CPU (=core). Did you make a clean install of Windows XP64 or did you just go from a dual core/single core to quad core on the same OS?
When you change how many core/CPU you have it is best to make a fresh install to avoid problem with HAL (it is part of how hardware via BIOS communicate with OS). Here is a guide: link
There are also some link to toolo which can be useful to see how OS/BIOS detect your hardware.
I suppose you have seen those tools from AMD site, but I make a link just to be sure: link
Did you use AMD Phenom Processor Driver
or any more then Power Monitor from this site?
What brand are your motherboard, do they have any site to see if there are more people with the same problem as you have?
Did you update your BIOS from MB vendor to support your CPU or did you install it without checking that your motherboard would have support for Phenom?
As far as I can see aren't AMD Overdrive meant for other chipset then those new AMD 7xx. Take a look at the right where you have option on this page: 7 series chipset
Don't use software of this type if you aren't sure that it is meant for your hardware. I would look at your motherboard vendors site for this kind of tool first and make sure those that give me advice really know what they are talking about. You chipset as you said belong to the older AM2 chipset (AMD690G) which where not designed to operate like those new chipset AMD 770, 790X or 790FX with AMD Overdrive.
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02:38 AM by