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

Just popped the Asus back in and stuck the new BIOS on it, seems to be a little better than the MSI where max OC is concerned - still appear to be hitting a multi wall at 50x though, so this is it for now, not pushing BCLK anymore.

side note: even this 1253 seems riddled with bugs so not sure whether to keep Asus or MSI....


5203_SB_pi1m by rustEswan, on Flickr
 
rustEswan - nice speeds

What volts you using for that, with what cooling and temps? My 2500k seems crap without decent juice running through it. And the new asus bios doesnt seem too special to me either, seems to need higher vcore settings for the same speeds as the previous one

And guess who didnt realise you cant flash to an older bios after flashing to a new one. That would be me :(

Cheers
 
It's at 1.45v in bios, reads about 1.43v in CPU-z but under load is nearer 1.46v. I havent left it at that for more than a few minutes so no chance of a load temperature reading im afraid.

my standard oc at 4.6ghz 1.3v barely hits 60 degrees, thats with an H50 and an extra 120mm fan in push/pull at lowish speeds, its pretty quiet, quieter than my xbox360 anyway...
 
reygjabla said:
It's kind of depressing that out of 1,000 2600K supplied by OcUK, less than ten managed to get to 5GHz.:rolleyes:
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You realise that hardly any of those customers actually use the forums right? Seems silly to assume that everyone who purchased a 2600K from OcUK not only overclocked it as high as they could but also posted their results on these particular forums.
 
reygjabla said:
It's kind of depressing that out of 1,000 2600K supplied by OcUK, less than ten managed to get to 5GHz.:rolleyes:
Click to expand...

I was convinced that mine wouldnt do any more than 4.6, at all, not even for a superpi run - However now im absolutely certain that pretty much anyone could do 4.9-5ghz at least for one run.

There are, however many, many things to get to grips with on this architecture. There are numerous threads about becoming more unstable with slightly higher voltages than the previous clock, memory/memory controller support from one bios to another or from one motherboard to another vary wildly - you need to test a lot of settings etc.

They seem to be happy only up to certain multipliers, rather than a given clock speed, eg I can't boot at 51x 100 BCLK (5.1ghz) but I can boot and superpi at 50x 104 BCLK (5.2ghz) indicating a multiplier wall of some kind.

Back at 4.6ghz going to 4.7ghz I had to up the voltage then found I over compensated and needed to drop the vcore and PLL to get it stable... I think that we're just all getting used to a very different architecture.

There's always going to be some difference between chips but Im very confident most could hit 5ghz for a superpi run as long as you know what your doing and take everything very VERY slowly. That is the art of oc'ing in my book - patience. Dont expect to just slap a 54x multi on SB and break every record going...
 
rustEswan said:
They seem to be happy only up to certain multipliers, rather than a given clock speed, eg I can't boot at 51x 100 BCLK (5.1ghz) but I can boot and superpi at 50x 104 BCLK (5.2ghz) indicating a multiplier wall of some kind.
Mine does not like BCLK at all... 100.4 is the max it will do at any multi.
My wall seems to be x54. even tried x55 and x56 at lower than 100 BCLK to maintain the 5400MHz and was instant lockup.

I have been really extravigent and yesterday ordered another 2600K plus The Gigabyte UD4... I will see if its the motherboard or the chip thats blocking me from the magic x55. Looks like i will have the first Sandy Bridge CPU and motherboard on MM in a coule of weeks lol
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Doppleganger said:
I could possibly get mine at 5Ghz with better cooling and 1.45v but I'm happy with it at just 4.7.
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of course.. but thats not the point in this thread - my goal is an oc that idles at 1.6ghz, 0.9v but under load clocks to 4.6ghz <1.32ish. That, to me, is the best 24/7 overclock.

This is just a throw caution to wind for 5 mins and see what you'res can do ;)
 
rustEswan said:
of course.. but thats not the point in this thread - my goal is an oc that idles at 1.6ghz, 0.9v but under load clocks to 4.6ghz <1.32ish. That, to me, is the best 24/7 overclock.

This is just a throw caution to wind for 5 mins and see what you'res can do ;)
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True. It's definitely possible for me to get a Super PI run and perhaps even be relatively stable at 5Ghz on my current cooling at 1.452v; possibly even higher raising the volts.
 
4.8ghz

ok so its not 5ghz, but ive only just built it today. (10 minutes ago):D
intel 2600k....bought here.... Batch L040B307
asus p8p67 EVO
g.skill ripjawx 2133mhz.. bought here
thermalright venomous x RT cooler

il try 5ghz when im done re installing everything, but it should be easy, i just set 1.38v for the cpu but it may very well do 4.8 at much lower volts.

only had winavi to test it, so not under 100% load.

will report back later with 5ghz, just wanted to share my system and cooler etc

full load was about 60 degrees at 4.8ghz by the way

Dont know what happened to Tmonitor, it went nuts:D
48ghz.png
 
i thought they all did 5ghz ??

I have read a few places that, that batch, has clocks of 5.3 and 5.7 on tinternet.


so you may be right, i really dont want to push it much more i can't afford to replace it.

I should really of tried to boot at 5ghz with that voltage, but i got nervous.

give me a week :-)
 
lads and ladies...in the grand scheme of things...getting 4.6 or higher is seriously good given that to get to 5.0 a couple of years ago didn't require the stock cooler...it required a large case of LN.

I know e-peen swinging is prevalent on here but having a CPU that does 4.6 is seriously good value for money :D enjoy it :D
 
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