Those of you with OcUK OEM 2700K Official OC Results thread!!

[Gibbo]

Hi there


Well as sales of our OEM 2700k is through the roof, no doubt because the word is out they are all first batch silicon and should prove best clockers, I thought a thread should be made to post overclock results. So I shall start:-


Max prime stable speed (minimum 1hr) - 5000MHz
Max booting into windows speed - 5400MHz
Motherboard - Asus Maximum Formula with BIOS set to AUTO mainly, just multiplier and vcore used.
Cooler - OcUK H2Flo with two fans
Memory - Kingston Genesis 8GB Kit



Prime stable at 5000MHz with 1.41-1.42v

Unstable boot into windows at 5400MHz with 1.55v

Be good to see others results in here from 2700k owners and please state if your CPU was an OcUK OEM one.

 

[Gibbo]

Oh come on!
I'm trying to resist getting a SB and waiting for SB-E or IvyBridge. Seeing people getting big clock on these is not going to help!
Plus there's the pressure of the whole "first batch" thing!
Damn you Gibbo!

Its why I purchased 500 out of the 700 of the first batch, because I knew their would be many keen people who'd want a good clocking first batch CPU. Worse case is they don't sell and well we just build systems with them, but I'd rather customers got them and clocked them to great levels.

As soon as the first 500 sell out I shall let you all know as they won't then be first batch any longer, but we've only sold 30 so far so plenty left to go.

 

[Gibbo]

Now the thing that concerns me, and I may just be being paranoid, is that since these are OEM chips that OcUK will have tried and tested them before hand and filtered off the really good overclockers for OcUK builds, staff and friends. Which leaves me/us with the rejected overclockers.

Other than that I am getting very close to saying to hell with waiting for IvyBridge (do we have an ETA on these yet?) and getting one of these and then seeing if IvyBridge is a worthy upgrade.

We've tested two!

One I took, it did 5GHz easy.
Another for a system build which ran at it's 4.80Ghz tested speed no issue, higher was not tried as it was a system build.

So out of 500 we've used 2, we don't pretest CPUs if we did well we'd be charging much higher price.

Plus with this batch there is little point we believe most will do 5ghz quite easily.

 

[Gibbo]

Nice tests. Just a a quick question I thought this applied to all Sandy Bridge chips ?

***OVERCLOCKING GUIDELINES***

- Do not exceed 1.35-1.38v core voltage, doing so could limit lifespan of the CPU


Now I see the site has changed it to (for 2600k and 2700k):-

***OVERCLOCKING GUIDELINES***

- Do not exceed 1.425-1.450v core voltage, doing so could limit lifespan of the CPU



Is that not way off intel's safe overclocking specifications ? Also didn't people before damage chips at voltages of 1.4v + core voltage ?

I see you changed the 2600K overclock guidelines to the same as the 2700k, but the 2500K is still on the old safer overclock guideline settings.

Has something changed recently with the 2600k and 2700k chips to allow such an increase in Vcore to be classed as safe now ? If that is the case so would it not be the same for the 2500k chps ? Also nothing has really changed on the 2700k from the 2600k apart from it's got a 100mhz boost in speed same stepping etc etc. Yes I do understand the principle of first batch silicon and can see some benefits to them chips for overclockers.

Yes Intel tech documents show a range of upto 1.425v as safe.

We deem upto 1.45v is safe, any higher though is unknown territory.

 

[Gibbo]

I've just taken a look at one of the CPU's for stepping info, here it is:-

SR0DG stepping
MALAY
L114B977

All of our OEM are this MALAY SR0DG stepping and so far all seem to do 5GHz with a breeze, look forward to see more results from customers.

 

[Gibbo]

Have you tested any retail samples Gibbo?

Nope and we have small numbers as such we can't guarantee a specific batch so we won't be testing those.

With the OEM we can guarantee the same batch due to buying 500 of them.

 

[Gibbo]

Is it safe to run these CPU,s with INTERNAL CPU PLL OVERVOLTAGE enabled 24/7 for your overclock? Ive never really seen this answered.

I just set the CPU at 1.41v so it runs at that always even when not loaded as I'm used to the old methods of clocking.

 

[Gibbo]

Only just noticed Gibbo - Is that just 5 minutes of prime?

Correct. It did however run for a further 3hrs before I shut it down.

 

[Gibbo]

Early adopters miss out

Free copy of BF3 now.

***** BATTLEFIELD 3 FREE WITH QUALIFYING INTEL PROCESSORS!! *****

They won't!

The ones who ordered over weekend shall get a code, were not that mean.

 

[Gibbo]

I notice that offer comes along a few days after I buy both BF3 AND a 2500K

Were not offering it with 2500k, you need to buy an I7 to get it.

 

[Gibbo]

Those who ordered before the weekend still miss out

Can't be helped, Intel visited Friday and offered us this promotion.

 

[Gibbo]

Nice to see another one of you joining the 5GHz club.

 

[Gibbo]

So, are you saying Gibbo is lying then ? As he metion 500 cpu's can do 5GHz easy!

Why are you putting words into my mouth Bulldog?

Where have I said all 500 chips will do 5GHz?

What I said is its look like **MOST** will do 5GHz.

As it appears your trying to accuse me of saying something else I will say it again it is looking like most will do it.

I also want to add its looking like most will do it on the basis the CPU has good cooling, by this I mean keeping the CPU ideally under 60c with load and certainly no higher than 70c, otherwise heat is certainly going to be a determining factor.

Also motherboards can greatly effect overclock, OcUK has not yet had time to look into which motherboard yields the most stable overclock, the Asrock board boostjunky has seems a good one as does the Asus Maximus though that is expensive. We did test with an Asus Sabertooth and this board caused issues wheras the Maximus did not.

So just to make it clear that as long as your CPU has good cooling along with a decent clocking mainboard and someone who knows whay they are doing I do feel **MOST** of these will do 5GHz with 1.40-1.45v with a very good air or water cooler.

But I have not said all 500 will do 5GHz, if I have said this show me where I've said it and I will ammend it because I don't remember saying as such and if I did it was no doubt more in excitment than actual fact.

Also lastly might I add OcuK are not guaranteeing any kind of overclocks on these CPU's or any other as not all CPU's have the same OC abilities, some clock better than others this is a known fact. However this is a good batch were building systems rated at 4.8GHz which we have to be confident will not fail.

When we get time we may look into researching a 5GHz bundle but such development could take days/weeks and as were experience record breaking sales at the moment all time is on getting systems orders built, tested and orders despatched.

 

[Gibbo]

Nah, I wouldn't swap. I only swapped due to going to 5Ghz and a platform with a longer life in it than my S1366

How is yours going m8?

 

[Gibbo]

For those who are interested, the first thing I've done so far is change the air flow on the H80 from sucking air in to blowing air out, that's given me a 2-3degC drop resulting in temps of 80degC for 4.8Ghz @ 1.38v in BIOS (1.408v in CPUz).

Now to change the CPU compound!

p.s. does anyone know what the rated CFM on the HAX-F 200x30mm fans are, they seem crap so was looking at the "CoolerMaster MegaFlow Mega Flow 200mm" which is apparently 110cfm @ 700rpm, sounds good but looks the same as the fans in the HAF-X already?

You need to try and bring your temps down too 70c, either turn your heating down or do as you suggest higher CFM fans.

Also make sure your CPU is getting 1.41-1.42 under actual load and not suffering Vdroop which some motherboards cause.

 

[Gibbo]

Gibbo what case and what fans were you using on the OcUK Extreme cooler?

Fans were Sanyo denki and rather loud. Loud fans kept CPU in 60-65c range, quieter fans your looking at 68c-75c and a single fan 80-85c. So dual fans and something reasonable seems best choice as I'd not really want to run my CPU above 80c.

No case on a bench. The motherboard had no cooling and have to say it felt very hot so I'd advice a fan cooling mainboard area if your using a watercooling setup.

 

[Gibbo]

Hi m8

Doing 4.7 no probs at 1.328v on air (Noctua D14) but it looks like the mobo is holding me back, when I push it higher it won't complete a boot. It's my own fault for cheapening out on the motherboard. I should have gone for something like the AsRock

The difference between a cheap and decent board when clocking can be huge, you cheap skate, thats what you get for buying a cheap B-grade MSI board.

 

[Gibbo]

If you think about it, if OcUK did filter out the best chips... having made a claim that they were of a good batch and 5GHz capable, if consumers consistently get worse results then OcUK would be in for a lot of accusations and bad feeling, I don't think they would bring that upon themselves.

No infact what would happen is we'd be selling CPU's pre-tested and guaranteed to 5GHz on the website.

We shall not be doing this for the following reasons:-

1. Anyone who wants to OC will not buy a CPU from us in fear that all the regular ones are poor clockers.
2. Any guaranteed CPU too 5GHz will have a large premium due to the time and resources involved.
3. We simply don't have the time to pre-test 500 CPU's, we have far better things to do.

So no were not pre-testing them, I myself have played with *ONE* and it was the first one I got out of stock and it did 5GHz, we've then built several of our Battlefield 3 PC's which are set to 4.8GHz and have not had issues.

So to answer your question were not pre-testing or have any plans to do so. Will these chips do 5GHz well yes we belive most of them will when fitted into a quality motherboard with good cooling that can keep the CPU sub 70c under load.

 

[Gibbo]

Whilst I await Boostjunky's feedback, I've managed to get the system prime stable at 4.8Ghz with 1.365 volts in BIOS which is undervolting to 1.360 under load in CPU-Z.

Temps are 67degC on coolest core and 74degC on hotest core but it is blooming cold in my office!

Judging by that your results are very similar to my own. 4.8GHz took 1.36-1.37v under prime load to be stable.

Nudging this upto 1.41-1.42v under prime load (so maybe 1.45v-1.47v in your bios) gave me 5GHz stable.

However my temperatures peaked at 66c with two high speed fans. Two moderate fans kept the temps under 75c and this was stable too. However over 80c was met with issues.

 

[Gibbo]

This seems quite similar to what I'm seeing, when I raise the vcore to 1.425 the system seems stable until the temps raise past 85degC and then it all goes to pot

It still seems odd that despite having a fully loaded HAF-X and a cold office, I'm getting such high temps in the first place

Do your rads get hot?