Looks like Intel has many 4MB DIEs, which don't bin that well.
(Heh, 2,8G is way above original clock)
They work - so it was easy to ship 4MB products for the same prices,
compared to the 2MB versions. Too bad for us (overclockers), they have
less headroom. I wouldn't buy 6x20 versions again.

-> Seems like there are 2 version - one which work with 1,25V (they look
good) and the second which work with 1,35V - don't buy these.