this was just after boot, with everything idle. i am using GPU-Z 0.5.1 (latest), with an ATI Radeon HD 5850 PcS
Well I have reference model 5850s which have core, ram, and vrm temps. Unfortunately there's no way to really know which is which without some experimentation. For example leave clocks the same and increase the voltage a bunch, or only increase VRAM speed. Afterburner gives you core temp so you can match that number to one of these to know which is core, and then the other two are probably one of vrm and vram.