Great thread TopicClocker! I'm coming from a Phenom II x4 B25 @ 3.4Ghz myself (unlocked Deneb-core Athlon II x3).
I picked up 2 G3258 combos with B85 chipset motherboards, a Gigabyte GA-B85M-DS3H and MSI B85M-P33 v2. Both boards cap the core voltage at 1.2v (which it goes to on AUTO when I overclock). And both cap my 1600Mhz memory at 1400Mhz, even with XMP profile enabled - probably a limitation of the B85 chipset.
I can hit 4.3Ghz on both with uncore at 4Ghz (it is what the Gigabyte caps Uncore at on AUTO, so I manually set it to that on the MSI board). Reading this thread, it seems I have a shot at going higher if I raise the ring voltage (or lowering uncore ratio?). Ring voltage on my Gigabyte is at 1.075v (Auto) according to CPU-Z. I'll have to read through this thread more thoroughly to see what the highest people have been able to get at 1.2v (i.e. whether I should bother trying for higher).
Have any of you found you have to raise timings on your memory for higher overclocks, even though the memory's running at a fixed speed?
I disabled EIST/C1E, as there was no difference in idle power draw with it enabled or disabled. EIST/C1E was really adjusting only the CPU ratio, as adaptive voltage is disabled on both boards when overclocking, which I read in another thread is a non-Z chipset limitation.
Is the C7 state supported by the G3258? Both of my B85 boards only have BIOS settings for C1E/C3/C6.