doubt it could be anything to do with video card.
possibly some chipset thing or AMD Cool N Quiet or something.. who wants to take a guess? maybe some of you with dual core systems could fiddle around please.
I couldn't reproduce the problem. I noticed I didn't have the Cool'n'Quiet drivers installed, though. I tested Paper Mario U with Jabo's Direct3D8 1.6 plugins and New Hacktarux Wrapper by Gonetz + Glide64 and this result was unreporudcable for me.
Both my cores are active, affinity set to both cores, and it is giving me bogus readings, such as idle 300%+ and negative values. My system is in great shape and up-to-date (Windows Update, DirectX June 2006, chipset drivers, latest BIOS, the works).
Setting to one core fixes it, but of course the limitation in the emulator is still there.
i actually thought RDSTC might be an issue a while back (because it is in MAME) and forgot to make a note of it. thanks. disabling CnQ (or anything that varies cpu clock speed) would probably also solve this but obviously you don't want to do that * not on multicore systems apparently though.
you don't notice speed problems in the emu, just counters being wrong?