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***Official Ivybridge Overclock Thread***

Currently sitting on 4.9GHz with 1.280/1.288V under heavy load, temps on small prime small fft's are hottest core 92.

This is after finding a good spot for my memory at 2000 10-10-10-2t.

Not sure it is worth de-lidding mine.

Sure, I'd hit 5GHz taking the IHS off, but meh. Got a 25% OC (on top of the stock turbo of 3.9GHz)

Happy enough with the temps and speed. At least I keep it's warranty this way.

Just a little more stability testing over the coming week, and run a couple benches to ensure I am getting the speed my clocks should provide.
 
Buckster said:
different Tj max - its higher on the IB
Click to expand...

Well Tj max on 2500k is 98c, Tcase max is 72c, Tj max is 105c on 3570k, only a 7c difference but people are running 90+, where as 2500k people run low 70+, difference of 20c, not 7c:confused:

Also from what i can find out Tcase max is actually lower on IB than SB.
 
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Tcase is irrelevant in this case

and re the Sandybridge - well people probably running them cooler than they need to be

everyone said don't go above 70C on a Q6600 I regularly ran mine >80C with no issue
 
Buckster said:
Tcase is irrelevant in this case

and re the Sandybridge - well people probably running them cooler than they need to be

everyone said don't go above 70C on a Q6600 I regularly ran mine >80C with no issue
Click to expand...

Not being funny, but why is Tcase irrelevant?

Probably running cooler than needed?

People are running them cooler because intel state a Tcase max of 76c, so I assume that is why people run them in check.

It just seems to me people are just ignoring high temps and overclocking the nuts out of there IB with temps nearing 100C without first knowing if it at all safe.
 
Tcase is irrelevant - as its the temperature of the metalwork of the case - that can be anything really - the important temperature is the Tj (junction).

the metalwork of the case cannot "fail" - the gates within the silicon can ...

I still think people worry about temps too much really....Intel will have set the Tj max - the temp at which it throttles at a temp where damage may occur above this temps

any temps below it - the larger the delta the bigger the wily waving :) low temps don't make the cpu quicker
 
Buckster said:
Tcase is irrelevant - as its the temperature of the metalwork of the case - that can be anything really - the important temperature is the Tj (junction).

the metalwork of the case cannot "fail" - the gates within the silicon can ...

I still think people worry about temps too much really....Intel will have set the Tj max - the temp at which it throttles at a temp where damage may occur above this temps

any temps below it - the larger the delta the bigger the wily waving :) low temps don't make the cpu quicker
Click to expand...

I hope you don't mean case as in a PC case?:D

Also, it has to be important, why would all of a sudden Tcase not be important on IB?

A quote I found,

As per CoreTemp's website:
What is TjMax?

This value should not be confused with the TCaseMax rating, which indicates the maximum temperature the top-center of the processor's heatspreader should not exceed.
If your CPU is rated for 100C TjMax, and it was nearing the 100C value in the temperature fields, that is a sign of overheating. The temperature should not exceed this value, or it may cause instability, shorten the life of the CPU and cause massive performance issues.
A rule of thumb dictates that the temperature should be kept around 20C or lower below the TjMax value while under full load.

What is considered to be a safe temperature for my processor?
For processors with the "TjMax" value being shown in Core Temp it is usually considered best to keep the temperature 15-20C below that value when the processor is under full load.
For chips which don't provide a TjMax value, such as the AMD K8 family of chips, it's best to keep the temps under 70C full load

Oh, and for anyone interested the Tcase max for IB 3570k is 67.4c
http://ark.intel.com/products/65520/Intel-Core-i5-3570K-Processor-(6M-Cache-up-to-3_80-GHz)
About 5C lower than SB, this is what I cannot understand why people are running at 90+ on IB
 
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Interesting. Thought the only thing to worry about was core temps keeping within tjmax.

Been doing a little reading an it appears the cpu temp measurement in Aida64 is the one you need to keep to tcase max.

Am exceeding by a couple of degrees usually hitting 68/69, but sometimes peaking momentarily at 70.

Dunno, why it would be lower on Ivy than Sandy, especially with the rubbish TIM they used.

Suppose can try a thing or two to try keep it 68 and below.

Edit: to be honest, nothing I am reading shows anyone concerned about tcasemax temps....
 
Rossi~ said:
C'mon, tighten those timings dude ;) 8,9,9,21,128,1T at 2000MHz here easy!
Click to expand...

I had no problems with this ram on Rampage formula, but on Z68 and current Z77, it doesn't play as nice.

Probably could tighten timings,but that's for another day.

I finally feel I have reached a point where I don't want to tinker any more, but use and enjoy :)

Even played a couple of rounds of BF3 yesterday! Want to get back into some relaxing role playing games :)
 
Edit: to be honest, nothing I am reading shows anyone concerned about tcasemax temps....
Click to expand...

Could it be because by monitoring the core temp of the CPU you are, indirectly, controlling within acceptable tolerance the tcase max threshold..?

Intel...

What does TCASE Max and Tjunction Max mean? TCASE Max is the maximum temperature that the TCASE sensor should reach. Both TCASE and the thermal specification information can be found on the Intel web site.
Tjunction Max is the maximum temperature the cores can reach before thermal throttling is activated. Thermal throttling happens when the processor exceeds the maximum temperature. The processor shuts itself off in order to prevent permanent damage.
Click to expand...
and

blueminus-toggle.gif
What is TCASE vs. Tjunction? These terms are related to processor temperature for desktop and mobile systems base on Intel® processors. To allow optimal system operation and long-term reliability, the processor must not exceed the maximum case temperature specifications as defined by the applicable thermal profile.
TCASE is the temperature measurement using a thermocouple embedded in the center of the heat spreader. This initial measurement is done at the factory. Post-manufacturing, TCASE is is calibrated by the BIOS, through a reading delivered by a diode between and below the cores.
Tjunction is synonymous with core temperatures, and calculated based on the output from the Digital Thermal Sensor (DTS) using the formula Tjunction = (Tjunction Max – DTS output).
Click to expand...
also

blueminus-toggle.gif
Does my third-party application report accurate temperatures for my processor? Most third-party applications are reporting the processor temperature fairly accurately. Because reports can sometimes show erroneous data, download Intel® Processor diagnostic Tool
Click to expand...
Unless that lot went way above my head, and probably did, I will just carry on and monitor the core temp on my 3570k which seems to max at around 75c or less when under full load in a warm room.
 
Will give that Intel Diagnostic tool a go some time - be interesting to see what it says about my current setup :)

Edit: actually, the cpu list at the bottom makes me thing it's not only valid for ivy desktops, but sandy desktops too - they are not listed.
 
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