SB-E [C2] Stepping

[Ghøst]

IM at 4.6 with 1.32 V this persuaded me not to swap out as I dont think my next chip would be as good

What's your temps, powerdraw, cooling solution & multiplier settings, 46*100?

Its supposed to be pretty easy to hit 4.7 on that board you've got.



I've still got VT-D disabled in the BIOS so effectively running an original chip atm, does anyone have any hands on experience of what affect enabling / disabling this feature had on overclocks, temps & stability.

 

[ToxicTBag]

Would all suppliers automatically be sending c2 stepping 3930k's now or should i phone them specifically and ask them do you think?

 

[Ghøst]

Would all suppliers automatically be sending c2 stepping 3930k's now or should i phone them specifically and ask them do you think?

I think you're pretty safe there unless you're buying from that online auction site or getting a seemingly ridiculously good deal. If in doubt about anything always ask, a good e-retailer will only be too happy to give you any additional details you request confirmation of.

If they don't then avoid them would be my advice.

 

[ToxicTBag]

Cheers Ghost appreciate that!
I guess all thats left to do is click the buy it now button along with rest of the kit to go with it .
Mr Edgedemon sah this is all your fault ..... i hold you personally responsible for the next 15 months on spaghetti hoops

 

[Ghøst]

Not sure what you're about to buy Toxic but apparently ASUS X79 boards with the exception of that mad Rampage Gamers thing don't play nice when it comes to overclocking with any Corsair 1866Mhz rated RAM one of the reasons why I ended up going with the MSI.

 

[ToxicTBag]

Thats handy to know Ghost thanks again.

Not entirely sure on the memory the mobo first instinct was r4 for the eventual 4 way sli ( 1 gpu at a time) but am looking around at the other x79 boards and they are pretty good. I am not that knowledgeable on overclocking but have learnt quite a lot in the last 12 months, some trial and a fare few errors.
I dont mind forking out nearly ... well a lot because this time am going to stick with what i get and make it last at least 2 years so i should get my moneys worth out of it.

 

[Ghøst]

^Lol it'll last much more than two years mate it's insanely quick at everything!


Has anyone had any luck at running FSB speeds other than 100Mhz & 125Mhz?, in order to get 1866Mhz RAM running at its rated speed & keep the desired 4.5Ghz cpu clock I'm going to have to try something like this:

1333Mhz*1.40 = 1866Mhz

140 FSB*32 CPU Multi = 4480Mhz

From what I've read very few of these CPU's can run at the default 167 FSB setting but what about custom settings between 125 & 167?



*Edit

Already tried sticking the RAM frequency to 1600Mhz with a 125FSB but fails to launch windows at 1999Mhz adjusted RAM frequency and it hops into repair mode then throws an exception error after checking files.

 

[edgedemon]

Mr Edgedemon sah this is all your fault ..... i hold you personally responsible for the next 15 months on spaghetti hoops

Toxic - you had an SR2 and Xeons - you can only blame yourself on this one

Not sure what you're about to buy Toxic but apparently ASUS X79 boards with the exception of that mad Rampage Gamers thing don't play nice when it comes to overclocking with any Corsair 1866Mhz rated RAM one of the reasons why I ended up going with the MSI.

They dont seem to like the gskill ram that much either..
Got home tonight to find my rig had crashed, from the logs it lasted 28hrs running seti at 100% cpu, so Im not too upset
The RAM is bugging me - I have 2133Mhz RAM, but when oc'ing, I can only get a windows login if I downclock to 1600mhz

So far my settings are

47*100 base clock
CPU loadline high
CPU current capability 120%
VCCSA loadline optimised
VCCSA current 120%
vcore 1.4V

DRAM current @120%
Power phase @ optimised

CPU seems solid at 4.7, temps a little high at just under 80..

I know with 32GB ram, I will struggle with the OC, so Im thinking I might drop the clock down to get more RAM speed, any advice on the alternate ways to do this welcome

 

[Ghøst]

any advice on the alternate ways to do this welcome

This would be a good place to start:

125 FSB * 36 CPU Multi = 4.500Ghz

or

""""" """"" * 37 CPU Multi = 4.625Ghz

or

""""" """"" * 38 CPU Multi = 4.750Ghz

Then selecting 1600Mhz RAM frequency will give your RAM an adjusted speed of 1999Mhz (1600*1.25) If its 2133 rated then it should boot into Windows fine once you adjust the timings to 11 11 11 27 2T.

Have you tried to increase the RAM voltage up from 1.5 to around just under 1.6 volts?


(Switching from a 100FSB to a 125FSB with a lower multiplier allowed me to retain the same 4.5Ghz clock speed with 1.30 Vcore as opposed to 1.39 Vcore & temps dropped by 10 degrees as a result. every chip apparently has a 'Sweet spot' whereby the right combination of FSB * CPU Multi will allow the same clock at a drastically reduced VCore - see guide linked at the bottom of this post of details.)

I know with 32GB ram, I will struggle with the OC, so Im thinking I might drop the clock down to get more RAM speed

Apparently getting a limit pushing CPU & RAM overclock at the same time is very difficult.




This guide is awesome...

http://www.overclock.net/t/1189242/sandy-bridge-e-overclocking-guide-walk-through-explanations-and-support-for-all-x79-overclockers

Loads of superb information in it.

 

[edgedemon]

Nice one ghost
Will have a read and then a play

 

[ToxicTBag]

I caved and ordered fingers crossed my c2 3930k mobo and ram will be here before lunchtime .... then i can really scour this thread for info must admit its one of the friendlier threads plenty of info nice one chaps

 

[Ghøst]

Nice one ghost
Will have a read and then a play

We have progress, upped my DRAM Volts to 1.65 and have booted into Windows no bother with this 1866Mhz rated kit at 1999Mhz on 9 10 9 27 2T.

Away to find a memory bench stress app then will start moving the voltage back down towards 1.6.

*Edit
Blue screened with a memory malfunction at 1999Mhz with 9 10 9 27 timings about 30 seconds after opening 2 instances of Prime's RAM test so loosened timings to 10 11 10 27 kept it at 1999Mhz and ran the 2 instances of Prime again for an hour with no errors this time.

Dropping back from 1.6500Volts to 1.6350Volts results in not being able to boot into Windows, so for now my two options would be 1666Mhz Ram at 1.5Volts or 1999Mhz RAM at 1.65Volts & I'm not sure if I'm comfortable running it that high. :S

Enough achieved for one day will look at it again tomorrow night....

I caved and ordered fingers crossed my c2 3930k mobo and ram will be here before lunchtime .... then i can really scour this thread for info must admit its one of the friendlier threads plenty of info nice one chaps

Cool beans Toxic, you're gonna be lovin' your new toy!

 

[ToxicTBag]

Cpu mobo and memory arrived spot on time today so as i was on a roll i thought i may as well get the waterblocks and a few gadgets to tart the old rig up.
Am really looking forward to putting it together and spent all night last night just reading reviews/videos/build logs by all accounts it is a cracking chip and most reviewers are at a loss to reccomend the 3960x costing a fare bit more for just 3mb extra cache .... a good night sleep tonight and i shall be in the c2 stepping club sometime tommorrow hooooorraaahhhh

 

[Ghøst]

That's awesome, you should be able to get some great temps & clocks with a full watercooling setup, good luck with your build.

 

[8 Pack]

We have progress, upped my DRAM Volts to 1.65 and have booted into Windows no bother with this 1866Mhz rated kit at 1999Mhz on 9 10 9 27 2T.

Away to find a memory bench stress app then will start moving the voltage back down towards 1.6.

*Edit
Blue screened with a memory malfunction at 1999Mhz with 9 10 9 27 timings about 30 seconds after opening 2 instances of Prime's RAM test so loosened timings to 10 11 10 27 kept it at 1999Mhz and ran the 2 instances of Prime again for an hour with no errors this time.

Dropping back from 1.6500Volts to 1.6350Volts results in not being able to boot into Windows, so for now my two options would be 1666Mhz Ram at 1.5Volts or 1999Mhz RAM at 1.65Volts & I'm not sure if I'm comfortable running it that high. :S

Enough achieved for one day will look at it again tomorrow night....




Cool beans Toxic, you're gonna be lovin' your new toy!

Nothing wrong with 1.65v mate. Leave it at that its fine!!!!

 

[littlepuppy]

What's your temps, powerdraw, cooling solution & multiplier settings, 46*100?

Its supposed to be pretty easy to hit 4.7 on that board you've got.



I've still got VT-D disabled in the BIOS so effectively running an original chip atm, does anyone have any hands on experience of what affect enabling / disabling this feature had on overclocks, temps & stability.

46* 100 , H100, 32 temps never over 60 ish.. Even when priming...

 

[littlepuppy]

PS it does 4.7 but not 4.8 so I run @ 4.6 as I think its rock solid.

 

[mmj_uk]

Hi guys, what sort of speeds are people getting on air cooling? I've decided to scrap watercooling (too much hassle) so I'll be using a an NH-D14 SE2011 in a well ventilated case.

I just need to decide between 3820 and 3930K but I think heat might be a problem with an overclocked 3930K? so I might be better off with a 3820?

 

[inSilica]

Hi guys, what sort of speeds are people getting on air cooling? I've decided to scrap watercooling (too much hassle) so I'll be using a an NH-D14 SE2011 in a well ventilated case.

I just need to decide between 3820 and 3930K but I think heat might be a problem with an overclocked 3930K? so I might be better off with a 3820?

You will be quite limited with how far you can push 3930 on Air. I've seen / read 3.9 / 4Ghz in a well ventilated case using a top cooler (keep in mind that all testing so far has been during winter time)

Why not grab an of the shelf solution. if you're only planning cpu cooling H100 will give you better cooling then NH-D14 at approx £20 more. If seated correctly I've see people hitting 4.5Ghz with no problem

 

[mmj_uk]

Hi I've already got the Noctua I just can't decide on the chip (only thing left to buy), I would have thought more than 4ghz would be possible though has nobody done any better on air?