my z87x-ud3h stopped working with my 2*2gb psc kit - although works with single-sided hynix and samsung sticks. Does this mean that IMC is damaged? Dual-sided hynix also fails.
Sorry to hear that about CPU.
It was your post in "haswell batch/serial numbers" thread where you mentioned this batch. I have the same batch here and will test it in next few days - your chip looked promising for SS and I hope mine will do the same or even better)
this may be caused by 2D lags caused by VGA drivers not installed. Wprime actively refreshs its window and bugs in 2D output may influence the result - I have noticed this when benching Athlon XP.
My results on 3770k state no difference between win8 x64 and win7 x64 in wprime (both clean and tweaked). And, as I.M.O.G. has stated before, the proper choice of OS can give you 1-2% of performance even in best case scenario but not >5% as this sub.