I've heard this too but I think this is an old issue. I would be very surprised if this is the case now and if it is. Also I doubt that disabling power states won't do it since this is a chipset specific feature where interrupts other than just low power modes rely on the HPET.
I would setup MSI Afterburning to output Framerate, both GPU temps, and both GPU usages to the OSD and I would see how load changes according to frame rate. I can't give you a comparison because I haven't played Crysis 3, and unless it's significantly different from the first two, I'm reluctant to buy it.
Heh. Arrogance, I love it! I'm just kidding. I understand loving one's machine. I love mine, but in all honestly, the only beastly thing about your machine is your 670s in crossfire. As far as memory and CPU speed is concerned, the i7 875 @ 4Ghz isn't bad, but you have new architecture chips pumping out higher numbers without water. My i7 3820 for example is running at 4.5Ghz on air and memory is at 2400Mhz (4 channels of it,) as well as two SSDs in RAID-0 and 3 HDDs in RAID-5. Which would be more "beastly" than what you got, but the 670s waltz over my 6870s. Granted I only game occasionally. My video cards probably crunch more than they game.
So as beastly as your rig is, it's not completely beastly and now that you mention it, it doesn't hurt to make sure your CPU isn't bottle-necking as well. Occasionally my i7 3820 will bottleneck on a game, but it's usually pretty rare and it's usually due to not being multi-threaded all that well. I don't expect this to work, by try setting your power options in Windows to "Performance". That way we know your CPU isn't going into a low power state so we can rule that out.
