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Dielectric grease on CPU instead of thermal paste?

Last response: in Systems
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I called two computer repair shops to find some thermal paste for a CPU upgrade. Neither had any, but suggested that I use dielectric grease (found at an auto parts supplier) for the job. While applying it to the processor I found it to be very similar in color and consistency to neosporin ointment rather than a paste. I ran my PC and performed simple operations for about an hour with no problems. CPU temp. held strong at 38 degrees Celsius. Should I have any worries?
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Your local Radio Shack should have thermal paste. Dielectric grease is used to keep moisture out of auto bulb sockets and spark plug boots and not designed for thermal conductivity.
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