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SB-E [C2] Stepping

cossie1 said:
With my C2, I can do either:

48x multi 100 bclk which gives me 4.8ghz with 1.365v (not tried IBT yet) with vt-d disabled.

OR

38x multi 125 bclk and get 4.75ghz with 1.365v (not IBT tested yet) with vt-d enabled.

Not sure which is best yet.

If I leave everything at default and let it auto level up to 4.02ghz, I have had it IBT stable at 1.250v
Click to expand...


Nice, I can't get anywhere near that, 4.5 is a struggle on mine, but I suspect that it is the 32Gb of RAM that is holding me back.
 
R4E, I can go to 4.8, but it will crash at some point during stabilty testing.

I need to sit down and read up on vdroop and other settings as Im not probably using all the tools I can
 
edgedemon said:
R4E, I can go to 4.8, but it will crash at some point during stabilty testing.

I need to sit down and read up on vdroop and other settings as Im not probably using all the tools I can
Click to expand...

I'm using the same board (although I am using the 1201 and 0013 bios from the Rog forums, as asus haven't updated there website yet with the latest bios's, and both of these helped with stability compared to 1101 that my board came with). Also my 3930k is OEM, but not sure if that really makes any odd's.

All i've done, is set the vcore to 1.370v manually, and then switched it to offset mode, and - 0.005v (so that it will drop the voltage when at idle).

I've got the multi on 47 and bclk on 100.

I also have the memory set on manual instead of XMP, and manually set 1600mhz (speed of my mem) and dram voltage to 1.500v.

LLC is set to high, and that is about it.
 
edgedemon said:
R4E, I can go to 4.8, but it will crash at some point during stabilty testing.

I need to sit down and read up on vdroop and other settings as Im not probably using all the tools I can
Click to expand...

I use LLC on high to give 4.7, volts set manually to 1.375, but the LLC allows it to rise to 1.392 (in windows) when required, all other settings default.

i gave up trying for 4.8 (stable) when i had to raise volts to 1.40
 
Does anyone have an idea what the average 3930K chip is overclocking up to with 1.35 - 1.4 volts (understand the silicone lottery).
Just trying to get a straw poll, as you see lots of these chips being 'benched' @ 5Ghz
 
Dan2kx said:
I use LLC on high to give 4.7, volts set manually to 1.375, but the LLC allows it to rise to 1.392 (in windows) when required, all other settings default.

i gave up trying for 4.8 (stable) when i had to raise volts to 1.40
Click to expand...

High LLC on this board means high current. Its advised using High LLC that you actively cool VRM's or they will cause CPU throttling.
 
8 Pack said:
High LLC on this board means high current. Its advised using High LLC that you actively cool VRM's or they will cause CPU throttling.
Click to expand...

It's like a wind tunnel in there, I think I'm good, PCH temp is highest at 35°C sometimes, That with the fan spinning at 4000+ rpm, noisey little bugger lol
 
cossie1 said:
I'm using the same board (although I am using the 1201 and 0013 bios from the Rog forums, as asus haven't updated there website yet with the latest bios's, and both of these helped with stability compared to 1101 that my board came with). Also my 3930k is OEM, but not sure if that really makes any odd's.

All i've done, is set the vcore to 1.370v manually, and then switched it to offset mode, and - 0.005v (so that it will drop the voltage when at idle).

I've got the multi on 47 and bclk on 100.

I also have the memory set on manual instead of XMP, and manually set 1600mhz (speed of my mem) and dram voltage to 1.500v.

LLC is set to high, and that is about it.
Click to expand...

You cant have manual and offset mode mate. As soon as you set offset the CPU dictates voltage its self so its nothing to do with the 1.37 you set. The - 0.005 tells the board to give a total Vcore of what the CPU sets - 0.005 volts!!!
 
Been playing with this C2 3930k for about 24 hours now & I must say the X79 platform is is pretty awesome fun as far as overclocking goes, there's tons of options to mess with.

So far I've only managed to get 4.4Ghz stable under Prime95's torture test, everything I've tried so far to get 4.5Ghz has resulted in a fail. I've only been playing with FSB/Base Clock VCore & DRAM Voltage settings so far but all giving Blue screens with various combinations of settings upto 1.4volts on the core although I have been able to get into Windows at 4.7Ghz but it fell about a minute into prime.

Given up going for 4.5Ghz for now & trying to find lowest voltage for 4.4Ghz whilst doing a bit of research on some of the more advanced overclocking settings currently back down to 44*100 @ 1.36 volts and about to try for 1.35.

Still undecided whether I've just got a low clocking chip or the VCore jump from 4.4 to 4.5 & beyond is more than what my bravery will stretch to.

This MSI guide that came with my board classes less than 1.3volts for upto 4Ghz as Easy, 1.3 - 1.4 volts for 4 to 4.5Ghz as Normal ,1.4 - 1.5 for 4.5 to 5Ghz as Fun and 1.5 - 1.6volts for 5.5Ghz as Dangerous & anything over 1.6 is not recommended lol

What's everyone else doing...?
 
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Some interesting stuff in here..
I have managed to get 4.7Ghz stable, but with my 32Gb of RAM at 1600Mhz (down from 2133Mhz) CPU @1.4V
Will post my settings later when I get home as I cant get any more out of it - 4.8Ghz just gives me an error when booting about no OS being installed and the same happens whenever I bump up the memory speeds
Slightly concerned over CPU temp - rises to 80C when extended stress testing :eek::mad:

Does anyone else have trouble with the rog forums?
It is quite a regular occurance that I get the following message

Service Unavailable

The server is temporarily unable to service your request. Please try again later. Reference #6.dc3a3bc3.1331504690.aa7514a
 
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^Well done



So on the plus side...

Bit more fiddling & I'm 2 hours Prime torture test stable on 4.5Ghz with a 125Mhz FSB * 36x Multiplier on 1.39Volts with core temps at the end of the test ranging from 70 - 80.


The flipside

The adjusted RAM frequency has downclocked from 1866Mhz to 1666Mhz with the 125Mhz FSB setting.


Nevermind enough playing for one day, the plan for tomorrow is to try & reduce core volts for the 4.5Ghz clock & try the 1999Mhz increased RAM frequency.

Good times :)
 
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Another 8 hours testing & after enabling Advanced Turbo Boost in the BIOS I'm solid stable with the following settings:

125*36 = 4.5Ghz with 1.30Vcore & core temps ranging between 60 & 70 at the end of the Prime 2 hour torture test & idle core temps ranging from 31 -35.

So have managed to drop the Vcore 90mv & as a result core temps have dropped 10 degrees all round.


Much more impressed with this chip today than I was yesterday, I'm wondering if CPU's have a 'Burn In' period like high quality loud speakers where the full performance won't be delivered until after being burnt in for 100 hours with white noise.

Hmmmmm...
 
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