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

Legion said:
Don't get sucked into the prime stable nonsense matey.
It's just for bragging rights, nothing else!

No application or game is going to put that much stress on the cpu in day to day usage.

If it does what you want now, leave it be before you splurge more cash for a pointless venture.
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I know your right mate, but its just peace of mind :) I remember the old days of ET clan matches and my PC BSOD-ing on me - I felt like chucking it in the skip lol. Maybe I'm a bit OCD with stability in my old age these days ;)
 
Right, I had a play with 5GHz yesterday with 3 air coolers and 1 water cooling:

Corsair H50 5GHz @ 1.48v @ 81C, 85C, 91C, 85C with Vipers (full speed @ 1850rpm) push pull had failed prime after 10 minutes

Noctua NH-D14 5GHz @ 1.48v @ 64C, 67C, 73C, 67C with Vipers (full speed @ 1850rpm) push pull had passed prime 2 hours

Silver Arrow 5GHz @ 1.48v @ 66C, 70C, 76C, 69C with Vipers (full speed @ 1850rpm) push pull had passed prime 2 hours

Prolimatech Megahalems 5GHz @ 1.48v @ 64C, 69C, 75C, 68C with Vipers (full speed @ 1850rpm) push pull had passed prime 2 hours

Room temp is 19C (no heating on) and all on same thermal paste MX-4 and I know 2 hours prime isn't stable but I only do it a quicker way cos of 3 air coolings to compare. Noctua seem to be the winner overall.
 
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Yes Noctua is far the best air cooler but Corsair H50 is very poor indeed with lots of heat from the pump all the way to the tubing to the radiator. And geeman1979, I had try Enabled CPU PLL at 1.38v at the bios but it failed instant, try push it up to 1.42v and it failed within 10 mins and the best stable one 1.48v due to limit the board or could be poor cpu chip need higher voltage.
 
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bulldog said:
Yes Noctua is far the best air cooler.
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Apart from OC3D website the majority put the Silver Arrow ahead, I think this is because the Silver Arrow comes with better fans and paste compared to the Noctua NH-D14? hence lower temps with the Silver Arrow.

But if people are willing to spend an extra £18 on the Noctua NH-D14 and £25 for superior fans and maybe better paste i.e. £43+ Extra :eek: then the Noctua NH-D14 will win by around 3 °C, may as well go water cooling if spending that much.
 
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Nelly - I agree with you as the Silver Arrow is just test the same fans with Viper fans and MX-4 thermal paste just to compare 3 air cooling and 1 water cooling kit. But of course, Silver Arrow with it own 140mm fans and thermal paste is proved a winner overall.

Silver Arrow 5GHz @ 1.48v @ 64C, 68C, 74C, 67C with 2 x 140mm stock fans (medium speed @ 1174rpm) push pull had passed prime 2 hours with CF III thermal paste and the fans is unbelieved very silent!
 
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Some very early results in for me (not thoroughly tested) with 2700K OEM & ASRock Extreme 4 G3 (custom watercooled).

1.35V in BIOS which according to CPU-Z is about 1.328v idle and anything down to 1.312v under load (not sure how accurate cpu-z is).

Anyway, at the voltages above I just did 5 loops of IBT at 4.8ghz using 6GB of memory and 8 threads, ~109Gflops per run.

I have not enabled the CPU PLL either.

Temperature is hitting 65-72C between all the cores.
 
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bulldog147 said:
Nelly - I agree with you as the Silver Arrow is just test the same fans with Viper fans and MX-4 thermal paste just to compare 3 air cooling and 1 water cooling kit. But of course, Silver Arrow with it own 140mm fans and thermal paste is proved a winner overall.

Silver Arrow 5GHz @ 1.48v @ 64C, 68C, 74C, 67C with 2 x 140mm stock fans (medium speed @ 1174rpm) push pull had passed prime 2 hours with CF III thermal paste and the fans is unbelieved very silent!
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Excellent - thanks for this information guys. i've just bought a Silver Arrow cooler as I don't really need watercooling anymore! :) Selling my watercooling in the MM now lol.

@@mmj_uk - seems they are all pretty similar these 2700k's! - thats the volts I was using to get 4.8 too :)

4.6 = ~1.28v
4.8 = ~1.32v
5.0= ~1.4v

The jump in volts to get them from 4.8 to 5.0 is quite high compared to the jump to get from 4.6 to 4.8. That'll be the reason why OCuk are selling them as 4.8ghz bundles - 1.4v is when you really need high end cooling to shine.
 
Just wondering what is everyone's temperature stock speed eg: 2600K @ 3.40GHz / 2700K @ 3.50GHz for an hour prime as mine is with silver arrow with 2 x 140mm @ 875rpm @ 1.200v max temp is 41C, 44C, 48C, 44C as idle are 18C, 18C, 18C, 18C all those come with Diamond IC 24 thermal paste

zoomee, you did the right choice go for Silver Arrow, these air cooling is truely great performance and a bonus of those twin fans of 140mm is 100% silent! As your 5GHz at 1.4v should give you a very good temperature with Silver Arrow! :) Post result back once you overclocked 5GHz with your new Silver Arrow.
 
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zoomee said:
Excellent - thanks for this information guys. i've just bought a Silver Arrow cooler as I don't really need watercooling anymore! :) Selling my watercooling in the MM now lol.

@@mmj_uk - seems they are all pretty similar these 2700k's! - thats the volts I was using to get 4.8 too :)

4.6 = ~1.28v
4.8 = ~1.32v
5.0= ~1.4v

The jump in volts to get them from 4.8 to 5.0 is quite high compared to the jump to get from 4.6 to 4.8. That'll be the reason why OCuk are selling them as 4.8ghz bundles - 1.4v is when you really need high end cooling to shine.
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Both the Noctua or the Silver Arrow should cope with 1.4v no probs on these CPU's.
 
zoomee said:
@@mmj_uk - seems they are all pretty similar these 2700k's! - thats the volts I was using to get 4.8 too :)

4.6 = ~1.28v
4.8 = ~1.32v
5.0= ~1.4v

The jump in volts to get them from 4.8 to 5.0 is quite high compared to the jump to get from 4.6 to 4.8. That'll be the reason why OCuk are selling them as 4.8ghz bundles - 1.4v is when you really need high end cooling to shine.
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Thanks for the info, I'm just running a more thorough test now at the same settings.

If it remains stable at this I think I will resist going for 5ghz because lets face it a 4.8ghz i7 is mindblowingly fast and on ~1.32v I'm honestly delighted. Either these 2700K's are indeed cherry picked CPU's by Intel or I'm guessing 2600K's will be clocking pretty much the same soon.

So I would like to apologise to Gibbo for all of the skepticism I aimed at him. :p
 
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Rjk the person didn't want watercooling anymore as he had say above. I am sorry but had to disagree with you over silver arrow, it far good performance, nothing wrong with it. Temperature are pretty good.
 
mmj_uk said:
Thanks for the info, I'm just running a more thorough test now at the same settings.

If it remains stable at this I think I will resist going for 5ghz because lets face it a 4.8ghz i7 is mindblowingly fast and on ~1.32v I'm honestly delighted. Either these 2700K's are indeed cherry picked CPU's by Intel or I'm guessing 2600K's will be clocking pretty much the same soon.

So I would like to apologise to Gibbo for all of the skepticism I aimed at him. :p
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I'd not come here big upping a batch of CPU's if they were not good, as you'd never trust me again. :)

They are good and as long as you have a good board with good cooling they will/should do 5GHz.
 
bulldog147 said:
Rjk the person didn't want watercooling anymore as he had say above. I am sorry but had to disagree with you over silver arrow, it far good performance, nothing wrong with it. Temperature are pretty good.
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what are you on about?

i never said the silver arrow was poor performing, i said it was hard to get hold of stock for the line?


either way, this is an overclocking thread for high end CPUs, i am suggesting that people interested in reading this thread may want to check out our fantastic watercooling range to accompany their CPU.
 
Here we go, 12000MB RAM using same settings as described above:

2700koem.jpg


Well impressed.
 
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