4670k Varied results. Little help please.

Soldato
Joined
13 May 2007
Posts
7,004
Location
On the wagon, sorta
Setup.

I5 4670k
8Gb Team Elite Black 1600MHZ.
MSI Z97 G55 SLI
HD7950

Built this system around a week or so ago and instantly the cpu was a real struggle to overclock, getting anything above stable was just a real ache in the rear and in general just started to beat me down but then adjusting the ram from auto (1.488v) to 1.550v, within the stated range of 1.50/1.60v +/- 0.075 gave me 4.4Ghz off the mutli alone prime stable for a few hours but result in random restarts just sitting on the desktop doing nothing.

I decided to play with the BCLK, the strap returned nothing for me struggling to load windows with a 125 boot strap and 33 multi. This im not entirely surprised by though as I really don't know what voltages need tweaked to stabilise the strap at over stock.
I Then adjusted the BCLK manually to 103.04 reaching a multi of 44 for a frequency of 4.549Ghz, This set the memory by default to around 1333mhz, and the cpu fly's through a few hours of prime, making it passed the 25 minutes barrier a 45 multi had, can memory frequency have an impact on the OC? The fact memory bus is handled on die now just makes things more complicated. My issue now is the PCIe bus must be unstable as the graphics driver keeps dropping out and throwing up a time out error.

I know now the cpu is capable of 4.5+ but how do I either stabilise the PCIe bus or get the cpu stable with a multi of 45?

Settings.
cpu_zps2d214f5c.png


Everything is adjusted in the bios but I just cant find my usb pen to take screen shots. stock VID is 1.275, currently the furthest I have gone is a vcore of 1.320, what is the safe maximum you would go with this, temps are sitting at a max of 75 during prime under a custom WC loop.
 
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Ta very much for the reply mate, tweaked things around and I just cant use the strap or get the pcie stable with a bclk of 103.4, maybe im missing something or maybe not.

4.4 is stable, running the RAM at 1.65 has kept the system stable with memory running at 1600mhz and just finished a 6 hour arma II/epoch mod run with no issue maxing temps at 59c. Just installing crysis 3 now to give that a bash but it looks like as nice as 4.5+ would be it isn't going to happen just yet.

Maybe in a week or two when I can be harassed to dredge through the bios again ill have another shot/ read up a bit more and go for round 2!
 
Just a follow on question for you 8 Pack, it is regarding Idle volts on the core.

I have offset set up on the overclock at 4.4 and noticed in HWiNFO that my idle volts are fluctuating around 0.110v and 0.200v, I know the CPU multiplier has down clocked the cpu to 800Mhz but that core voltage seems awful low?
 
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