You can't go without a CPU meter gadget on your Windows 7 desktop, this is All CPU Meter v3.2 and it's great.
|All CPU Meter|
With this All CPU Meter Gadget you can display your Processor usage (Twenty Four Core, Sixteen Core, Twelve Core, Eight Core, Six Core, Quad Core, Triple Core, Dual Core or Single Core), Cores temperatures and RAM usage.
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Windows Gadgets - All CPU Meter