Soldato
What other settings would you use for 4.6-4.7GHz?
May go back to the 100 strap and see if i get better results.
************ Official 39XX Overclocking Thread ************
- Thread starter eyetrip
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What other settings would you use for 4.6-4.7GHz?
May go back to the 100 strap and see if i get better results.
up the vccsa to like 1.250 - 1.275 and see if that helps
Soldato
Didn't help
And neither did pointing a big desk fan over the entire motherboard keeping the Mosfets cool..
Starting again at 46x100 instead.
Hard for me to give educated suggestions, as am just experimenting and learning how different combinations of voltages affect things.
But for 4.75GHz seems I need to go north of 1.85V on pll. Currently trying 1.88V, or somewhere around there. Am combining this with a lower core voltage than I tried previously, as am currently investigating the effect of upping the pll as opposed to just chucking more volts at the core.
Currently, load volts around 1.320/1.328V. Higher vcore looks to have much larger effect on temps than pll.
If I get through 10 runs very high ibt, am going to up the pll a bit more, and see how low I can go on vcore before error. Don't think will go above 1.95 pll though.
It was cammy saying he was a 4.75 with 1.288V core but other stuff auto that got me playing with this as I know on auto for things ike plll and vccsa, my asus board can go quite high.
But for 4.75GHz seems I need to go north of 1.85V on pll. Currently trying 1.88V, or somewhere around there. Am combining this with a lower core voltage than I tried previously, as am currently investigating the effect of upping the pll as opposed to just chucking more volts at the core.
Currently, load volts around 1.320/1.328V. Higher vcore looks to have much larger effect on temps than pll.
If I get through 10 runs very high ibt, am going to up the pll a bit more, and see how low I can go on vcore before error. Don't think will go above 1.95 pll though.
It was cammy saying he was a 4.75 with 1.288V core but other stuff auto that got me playing with this as I know on auto for things ike plll and vccsa, my asus board can go quite high.
Soldato
Soldato
Cool, will play around with PLL
Are you still keeping the LLC at normal?
If anything rasing PLL made it worse
Tried 1.85 and 1.9 but to no avail.
I'm beginning to think i have a bad chip...
Oh, and no I do not use normal/regular offset, I use medium.
high just ups the temps too much.
Got to say, I was expecting the ND14 to cope a little better than it is. Though the Noctua TIM worked best, but ND14 didn't come with much and am stuck with MX2 or Zalman zm-stg2
Used to be quite happy with the mx2, but I definitely seemed to get better temps with the Noctua paste.
high just ups the temps too much.
Got to say, I was expecting the ND14 to cope a little better than it is. Though the Noctua TIM worked best, but ND14 didn't come with much and am stuck with MX2 or Zalman zm-stg2
Used to be quite happy with the mx2, but I definitely seemed to get better temps with the Noctua paste.
maybe your ram is holding you back slightly.
try relaxing it alittle and see if that helps?
before I cooled the southbridge/vrm/mosfets I was hitting a brick wall around the 4.75ghz - 5ghz barrier aswell so cooling plays a huge part here but that means spending money.
I use ic diamond paste FYI
try relaxing it alittle and see if that helps?
before I cooled the southbridge/vrm/mosfets I was hitting a brick wall around the 4.75ghz - 5ghz barrier aswell so cooling plays a huge part here but that means spending money.
I use ic diamond paste FYI
Soldato
Right, i'm stable @ 4.6GHz with an offset of 0.3v and LLC Medium which gives 1.356v full load.. so damn high for 4.6GHz but it's stable. What do you suggest i tackle next to get the voltage down? Also, have toy got the new C2 stepping?
http://img641.imageshack.us/img641/7528/4600ibt.png
The RAM is fine, it's Samsung Green which i've had clocked very high and stable. At the moment i've just got it clocked low with relaxed timings to rule it out.
It does seem to want high volts to get stable and i've had it 18~c ambient with the window open, case open and a desk fan pointing in which drops the VCORE (MOSFET) temperature by about 20c but made no difference.
With these setting currently the CPU hit 82c eventually, i'm going to remount the Phanteks again as i'm seeing a large difference in temperatures between Core#0 and Core#3. Mounting this heatsink is hard to do getting it completely straight on and even in one, need another pair of hand maybe.
As you said it could be cooling, but i've spent so much time searching the net for similar setups on air and they have no problems. It seems like i'm missing something.
Soldato
Just been trying to get my RAM up from 1600... not having it. Seriously think i've got a rubbish chip here. Also too afraid to push the VTT voltage now because i've been reading about the C2 stepping degrading over 1.2v of VTT.
I'm starting to lose my marbles. I may just settle for 4.5GHz CPU 2000MHz RAM
I'm starting to lose my marbles. I may just settle for 4.5GHz CPU 2000MHz RAM
I still think it may be your ram holding you back rossi.
those are the ones with no heatsink on them arent they?
see what others are using? im using dominators
Soldato
How can they be? They're 30nm and have taken them up to 2400MHz before, people have taken them even further. They don't require heatsinks, in fact most DDR3 don't require heasinks under 1.65v
All i did was try to take them to 2133MHz @ 10,11,11,22 1T @ 1.55v and it failed. I tried these settings also:
11,12,12,28 1T @ 1.55v and 1.6v
11,12,12,30 2T @ 1.55v and 1.6v
12,12,12,31 2T @ 1.55v and 1.6v
12,12,12,32 2T @ 1.55v and 1.6v
I've had them stable at 2333MHz 11,11,11,24 1T @1.55v and 2400MHz 11,12,11,28 1T @ 1.62v
Also, eyetrip is using the same RAM.
Man, I have got to get some better thermal paste.
Was getting a good 5C cooler with the Noctua
Am determined I am not going to run this chip lower than 4.7, and it doesn't seem to matter how much I lower volts over core/vtt/pll, etc, temps remain high.
Don't know how people manage to run close to 1.4V on these on air. Unless they completely ignore IBT temps.
Is IBT a bit like furmark for CPU's? I.e a completely unrealistic strain on system?
Was getting a good 5C cooler with the Noctua
Am determined I am not going to run this chip lower than 4.7, and it doesn't seem to matter how much I lower volts over core/vtt/pll, etc, temps remain high.
Don't know how people manage to run close to 1.4V on these on air. Unless they completely ignore IBT temps.
Is IBT a bit like furmark for CPU's? I.e a completely unrealistic strain on system?
Mine runs happily at 2133@10-10-10-28-1t with 1.425V
Just remember to keep vccsa up - like 1.2-1.25V
And also, my board has a setting on the dimm timings page for "Rampage tweak" or something. If you have that, try setting mode 1 - works far better for me than auto/mode2
Decided to drop my llc down to regular to see what it did for temps and it took a good 5C off.
I also upped the offset a little to compensate, but not very much and I was honestly expecting a BSOD or error before long, beause I am betwee 1.304/1.312V under load, but so far my IBT 10 runs very high and about half an hour of prime95 have been running fairly solidly.
The true test though will be resuming from sleep - often when have been pushing system hard and gotten no errors, will get a BSOD when resuming from sleep.
I also upped the offset a little to compensate, but not very much and I was honestly expecting a BSOD or error before long, beause I am betwee 1.304/1.312V under load, but so far my IBT 10 runs very high and about half an hour of prime95 have been running fairly solidly.
The true test though will be resuming from sleep - often when have been pushing system hard and gotten no errors, will get a BSOD when resuming from sleep.
Is it not the case that anything over 1600mhz with sandybridge see's little benifit?
I have just played with my chip for 10 minutes trying to get it to be stable at 5 ghz, Vcore was up to 1.4v but it was BSOD me in prime95.
could have got it stable but im not willing to put my chip under 100% with vcore over 1.4v. I would rather run it @ 4.75ghz 1.3v and my cooling is mega top end so i wouldnt beat yourself up to much if your getting 4.5 - 4.6 with air. to be honest there is no noticable difference and ive heard that VAbsolute is 1.4v with these chips so the further away from that the better.
if you can get 4.5ghz with ram at 2000mhz thats awesome my dominators are at 1666mhz