Quote:
Originally Posted by Assassin48
thanks guys for the help but i just cant seem to put everything together for some reason.
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High mem speed = high uncore = high QPI speed = lower CPU top speed on a multi limited CPU which is why most setups have serious BCLK limitations
Same with tighter timings. It puts more stress on an already limited uncore top speed.
For 220 Benchable on my rig 20 multi (21x with turbo), 1066 Mem divider (8x) 16X uncore 4.8GT/s QPI (18x) and 4890 OCed to snot and beyond
(this holds the mem*2=uncore uncore 8:9 ratio to QPI) I noticed my uncore falls down around 4300 MHz so going to start working with the 6X mem multi dropping the uncore to 12X to hopefully pass 222 BCLK
vcore 1.5+
Vdimm 1.85 (~ 1780 MHZ 7-7-7-1T)
CPU PLL 1.65 or 1.85 either seems to work better than 1.8, needs more testing
VTT + 400 (1.5-1.55)
QPI PLL 1.4v
IOH Core (1.1v stocks) 1.35-1.4
IOH ICH I/O core (1.5v stock) 1.625-1.7 (More is not always better)
ICH core (1.05 stock) 1.2
The offest settings, you should try..
Clock drive both at 700 mv
CPU Skew IF NEEDED -100ps
All CPUs are different. So what works for one does not work for another. All these voltages are way out of spec, but necessary to make the big jump to 4.6+ GHz for me
If you have an MCH strap on your board, you can try adjusting it too, it controls the timings for the memory subsystem. Lower strap tighter timing, higher strap more OCing.
Important things to remember about i7.
Memory is not just sticks of RAM. Treat it as one entity from the sticks to the CPU to the chipset. A fail point does not necessarily mean your RAM sucks. High clocks can be uncore or QPI limited. Uncore/QPI voltage is supplied by the chipset NOT the CPU. ( A little trick intel pulled to get the i7 arch under a certain power rating. Estimates are as high as 40-50W of power for an OCed i7 being supplied by the chipset)
QPI/Unore is most peoples limiting factor. P55 has a weaker/looser memory subsystem, they can drive mem speeds WAY up. DO NOT look at p55 mem clocks for X58, big difference in capability. P55 faster and looser, also MUCH less effective
A synchronized system will perform more efficiently and throw less heat than one out on the bleeding edge in one or two areas.
200 BCLK is the max stable for most people as it pushes the QPI past 8 GT/s. It requires lots of volts and cool temps to get it past that with much stability. Anything past that is bonus
If you want to swap out anything, get a new CPU, but look at max top speed you want and get a multi accordingly. 25X multi I think is a good place to start if you intend to go DIce in the future or chill water.
Guys with more expensive chips have a higher "easy OC" they will struggle with the upper limits of their chips just as much as you
Upgrading just moves the point of frustration to a higher level (and not always a higher level, I do not see much difference around the forums between a 920/950
)
If you are getting frustrated, walk away.
Drop down to 200 BCLK and enjoy the CPU for a while playing some video games or something
Don't think there is much else I can help yah with. Hope this at least gets you somewhere
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