OCUK Sandy Bridge, SB-E and Ivy Bridge 5GHZ Club

gcaster said:
Not like that you can't.
Unfortunately you've taken the screenshot after the clock has dropped back down to 1600MHz. Get another one with the correct clock speed showing.
VCore on your chip looks to be incredible for a 5GHz oc though. Nice one.
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What a plum lol
 
Can I join the club part 2 lol
5ghz-attempt-2.jpg
 
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Guys what is the situation with RAM on these beasts? I'm thinking of getting a 2600k and would want to run at 4.5-5Ghz stable, what RAM should I be getting (want 2x 4GB sticks).
 
axer said:
Guys what is the situation with RAM on these beasts? I'm thinking of getting a 2600k and would want to run at 4.5-5Ghz stable, what RAM should I be getting (want 2x 4GB sticks).
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Get any ram you like, overclocks are no longer tied to ram at all.
 
Steve0 said:
Well almost:) My Ram is holding me back, I went for this http://www.overclockers.co.uk/showproduct.php?prodid=MY-203-CS&groupid=701&catid=8&subcat=1517
upto 5.390Ghz I cant fault it if I want to load windows @5.4Ghz I have to lower my Ram settings which when benching gives me a lower PI score I get 6.963s @ 5.390Ghz but only 7.20s @5.4Ghz
Still......can't complain;)
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hmm the fact still stands that ram is not tied to the overclock and there will be many things that might need you to relax the ram settings at that cpu speed. I see from your cpu validation that you have spread spectrum enabled which would leave your ram running at 1596.96mhz, it might not even like that who knows, it could even be the board misbehaving at that speed too. Your settings aren't exactly 24/7 everyday either lol. It's a bit rich saying your held back at 5.390ghz:D. I myself run that ram at 5ghz no problem. I would investigate further and try setting something up at your speeds but there is no way I am putting 1.6v through my 2600k:eek:

So for those of us excluding Steve0;) it really does not matter which ram you go with, most people will be thermally challenged way way before 5.390ghz anyway.
 
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Just to input on the ceiling effect of ram and over-clocking SB - ram will hold you back if you are relying on BCLK for your over-clock on your CPU. If you are only using the multi to achieve over-clocking then no problem.

What I mean by that is. With the multi your ram is not linked to the CPU speed.

With BCLK your ram is linked to the changes of BCLK on the IMC of the CPU therefore if you ram can not clock higher it is a problem. :) So the higher the BCLK the higher the speed of the ram is required to run.

For 99% of users that should not be an issue.
 
1Day said:
Just to input on the ceiling effect of ram and over-clocking SB - ram will hold you back if you are relying on BCLK for your over-clock on your CPU. If you are only using the multi to achieve over-clocking then no problem.

What I mean by that is. With the multi your ram is not linked to the CPU speed.

With BCLK your ram is linked to the changes of BCLK on the IMC of the CPU therefore if you ram can not clock higher it is a problem. :) So the higher the BCLK the higher the speed of the ram is required to run.

For 99% of users that should not be an issue.
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A fair point for sure,although my statement was based on the common opinion that bclk ramping is a no go.Is it safe to alter bclk, I know I did for my super-pi run but my 24/7 config has a bclk of 100. I know there was a lot of talk about bclk increases causing failures when they first came out, is that still true? and is it still advisable to avoid raising bclk
 
Within the benching world we push the CPU via Multi and via the BCLK. And the trick is finding which combination allows you the most headroom. What we have found is that as a rule it is the CPU (Sandybridge) which has a frequency wall. So it matter not if you get to the same frequency using a higher multi and low BCLK vs a lower multi and heaps of BCLK. What we are now doing in our every ongoing benching tussles with each other is to get the most out of our ram since the CPU frequency is walled. That means far greater focus of BCLK type benching to optimise the latency and frequency scaling of the ram.

The price you pay for this increased memory frequency at a low latency is the need for additional vTT and that is killing the IMC of many a good bencher's CPU. Bare in mind that the amounts of vTT that some of my team mates are putting into the CPU is well in excess of 1.455. :) Crazy and a sure death sentence for a CPU in my view. But if you are trying for a WR then you have to make that call.
 
1Day said:
Just to input on the ceiling effect of ram and over-clocking SB - ram will hold you back if you are relying on BCLK for your over-clock on your CPU. If you are only using the multi to achieve over-clocking then no problem.

What I mean by that is. With the multi your ram is not linked to the CPU speed.

With BCLK your ram is linked to the changes of BCLK on the IMC of the CPU therefore if you ram can not clock higher it is a problem. :) So the higher the BCLK the higher the speed of the ram is required to run.

For 99% of users that should not be an issue.
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Thanks 1Day;)
Which is why I said 'Well almost':)
As I said I can't fault this ram upto 5.3 it works very well and for the current price is a bargain.
Maybe I should have explained myself better as this setup is not part of my main pc it's in a workshop on a test bench being flogged.......weired I know but some do that sort of thing:D
It does run 24/7 @ 1.6v on the bench, I have had it upto 1.72v running for 24hrs without it degrading.....yet! Unfortunatly it is not a golden chip but it is still good the max multi is 54 for this chip and max BCLK on this setup is 107.5 (not together ofcourse).Raising the BCLK will not kill your hardware but it will stop working for that session i.e with a multi of 48 and a BCLK of 107.6 my Ati 5770's will shut down until the BCLK is reduced, reboot and they will be working again.
I have been doing this since the early 90's when you could unlock the AMD cpu which had a locked multi, if you knew what you were doing it could be unlocked and would enable you to kick Intels butt very easily.
Over the years I have had one cpu die on me, that was due to me shorting out a board which took the cpu with it, I use cooling that is available to everyone, using air or chilled water setup with all copper tubing and where possible all soldered joints as compression fittings will reduce the water flow. Currently i'm using a H70 with a couple of minor modifications until I have the time to modify my normal water setup.
I have only ever posted a cpu result once on a forum which happends to be here in the Overclocking and Tuning section on this board called OCUK:confused: despite being active (reading only) on the more overclocking friendly boards some of you will understand why possibly 1Day, Simon and a couple of others.
Oh and before I go back to frying my chip @1.6v+ I am not telling anyone to do the same, but if you bought a K series sandy the chances are you will want to clock it anyway, if you can afford to replace it or it is not being used in your main PC then do what you want with it and ignore the haters, it is your money and choice and if you catch the bug like I did many years ago you may want to pop along to one of the more dedicated overclocking forums, the criticism is much more constructive on those......well most of the time!:D
So to sum up.......will I kill my chip? Possibly, this one is for that purpose I am not going for the highest clock to bench for scores I am testing this chip to see what Sandy can handle, sofar she is doing well given the amount of abuse she is taking!
Have fun clocking those chips guys.....and gals @1Day carefull with that stuff,:cool: I have never used it due the risk of getting frostbite, with my luck I would!:)
 
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