Yep, it's certainly strange. The memory's on a divider atm and was running at 233mhz 2,3,3,5 1T when at 2.8ghz. I may try it at 1:1 280mhz 2.5,4,4,7 to see if I can wring some more bandwidth out of it (it's good stuff this GeilONE tccd!). Sadly the m/board craps out when trying 3ghz at 1:1 regardless of timings.
[edit] nope, it's as I expected. The av8 just waves a white flag when trying to run anything over 270 htt 1:1 even with another .05v shoved up the hypertransports butt. I'm stuck with a divider which is a shame since this ram's brilliant.