ok guys, finally I got my weird gflops performance drop with IBT sorted out so I thought I may share the knowledge, it appears that my gflops dropped because my overclock was ALMOST stable on my current voltage but not stable, I mean it was not unstable to the degree that it could freeze or give BSOD but simply the voltage was not enough so the cpu was starving and in turn gflops performance dropped, my voltage was set to 1.28 in the bios and it was reflecting 1.272 in cpuz and during stress vdroops to 1.25-1.26 range (I have LLC and cpu power phase on auto), so I raised the voltage to 1.29 in the bios so it reflects 1.287 in cpuz and vdroops to 1.272-1.282 and that gave me stability and ran IBT and linx like charm, my cpu went through 25 mins of linx biggest problem size and 10 runs on maximum in IBT and passed with flying colors with consistent performance, 320gflops in linx and 188 gflops in IBT and temps are still good (below 85C on the hottest core).
so now I will summarize my achieved overclock:
i7 5930k @ 4.4ghz vcore is set to 1.29 offset mode, reflects 1.287 under medium loads, reflects 1.272-1.282 under heavy loads like Linx and IBT and goes as little as 0.8x when the cpu is idle and the speed as 1200mhz as I have all C-states active and voltage on offset as I mentiond.
LLC, cpu power phase, overcurrent protection and all of my bios setting are on auto mode including ram which is running at the ddr4 JEDEC speed of 2133mhz and CAS15, while I have corsair lbx 2666 CAS16 rams and they where stable with their tested speeds of 2666mhz and CAS16 I have found that overclocking the ram is of no benefit for me as my PC is used mainly and only for gaming and my 1080p plasma TV only supports 60fps anyway, so yes overclocking the ram is gonna be useless in my case and will but some load on my cpu's memory controller with nothing to gain so I kept them stock.
stability tests was as the following:
- 10 runs on maximum with IBT : Pass
- 25 mins on LinX on max problem size: Pass
- 8 hours of asus realbench with 16gb : Pass
- 12 hours of Aida64 including all tests expect gpu and storage : Pass
- Prime95 27.9 1 hour : Pass
absolute max temp came with linx and was below 85C on the hottest core. (corsair h110 push/pull)
all in all I rate my overclock as above average and my stability to be rock-solid.
as for my luck of the draw in the silicone lottery I think that while my cpu may not be the best but it is certainly above average and im very satisfied with my results, to have it stable at that core speed and vcore with offset voltage, no LLC and all C-states active is something don't you think
and NOW IM BACK TO GAMING
and last but not least im open to all of your opinions guys Edited by SsXxX - 10/30/14 at 2:10am