Some time ago i asked for an upgrade path from a 3570k @ 4.7GHz.
Found a decent deal on a used Rampage IV Formula and a E5-1680v2 Xeon.
Combined with a 32Gb Corsair Dominator platinum 2400MHz (4x8Gb) I found myself a serious but affordable upgrade.
But now I have been playing with it for some weeks I kinda stumbled uppon an OC wall !!!
E5-1680v2 @ 4.4GHz (100 x44) 1.28v (180%, extreme LLC)
4x8Gb Corsair dominator @ 2133MHz 9-11-11-31 (1.6v) (2400MHz has bandwidth bug)
VCCSA and VTT voltage both at 1.05volts
But whatever I try I cant get the CPU stable at 4.5GHz or higher.
Above settings are ROCK stable => OCCT for 8+ hours, Prime95 8+ Hours, memtest+, gaming etc...
Tryed 45x100 and the 125mhz strap (x36), higher cpu voltage (went till 1.395v witch under loads goes above 1.44v)
I can boot into windows start some benchmarks but get bluescreens while running them, sometimes instant sometimes after 30-40min.
I've been overclocking since the pentium 4 days so I'm deffinitly not new to the game but kinda try'd everthing I could think off.
Any insight to what I could do to get a bit higher, although the system at 4.4GHz rocks and does everything I want it to.
You know how it goes, that overclock bugg and all. Plus +4.5GHz just sounds better.
edit: forgot to mention I'm watercooled, with a 3x140mm (420mm) radiator so temps never go above 65° on OCCT.