From experience, most of the E74 360's have the same issue as boxes that have had the 3 red light error, broken solder points between the gpu and motherboard and reflowing seems to fix the problem, really depends on what solder joints are a problem, one thing i know for certain is that the jasper has not completely eliminated the 3 red lights issue, so it still exists.
However i'm not certain if e74 is a more common problem with the jasper chipset.
The problem is the 360's exterior was designed prior to the layout of the internal parts, they had to build the box so that everything inside would fit to meet the exteriors design specs, unfortunately the design allows the motherboard to warp due to heat produced by the processors, which eventually leads to the common fault of broken connections between the gpu and the motherboard. New chipsets reduce the amount of heat produced, however the structural flaw still exists, and therefore it will be near impossible to completely iradicate the problem.
I think microsoft aught to ditch the x-clamps, and install some pc motherboard type clamp for the heatsinks, that will help reduce the pressure on the board.
