Real Temp Core limit?

Hello all,

I've just built a dual Xeon E5520 rig (so with hyperthreading that will be 16 cores). I'm looking at benchmarking and OC'ing it, but I'd like to use something to monitor the temps first. Real Temp was suggested here, so I gave it a try. It looks great, but I only see four cores showing up. I'm assuming Real Temp ignores Hyperthreading? (hard to measure the temp of a logical processor!). But even if that is the case, there still should be 8 cores showing up, and I only see 4. Is there a core limit in Real Temp?

Thanks!