I wouldn't ignore it. How do your cores look at idle? Are they close to the same? If they're near the same, don't ignore it....the sensor probably is just fine. If you have odd idle temps (like I do), then the sensor's probably defective.
My Opty 165, one core idles normal (a few degrees above the CPU temp). The other core idles around ~5-9*C. I know my ambients aren't quite that low, so I know that sensor is screwy.
EDIT: I have not read of anyone having trouble like this with the CCF.....everyone says it's good. Must be the chip and a wild coincidence that I get 2 whacky ones in a row.
Edited by ny_driver - 1/25/10 at 3:33am