Overclocking Core i7-3770K: Learning To Live With Compromise

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gsxrme

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You guys don't understand this is intels push for the IvyBridge-E CPUs that will be coming out for $600-$1200. Intel is forced to screw over then 1155 socket CPUs because Sandy bridge did so well the SandyBridge-E didn't sell worth shit because the 1155 SandyBridge overclocked and ran so fast.

$100 bucks says Intel doesn't use the same thermal shit between the CPU die and the shield and Ivybridge-E overclocks to new records.

It was to good to be true with the 2500-2700k's now its rape time! and we can thank AMD bullsinker for this
 

BVKnight

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Why is the TH test throttling your chip at high 90s-100 C if the TJMax for the Ivy Bridge chips is 105? I thought that the chip wouldn't throttle itself until it hit that limit.
 

DEVILVSANGEL00

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Spend all that time and money to create a 22nm cpu with great efficiency and overclocking potential and go and throw it all away by using cheap thermal paste that's almost impossible to replace and at high risk, intentional or not by intel thats a epic failure on their part.

All i can say is if someone can create a business replacing the cheap thermal paste and replacing the heat spreader they might end up with a very long list of customers wanting to get what intel should of given in the 1st place.

Lets hope they fix this problem if they got any sense or loyalty to their customers
 
Very nice Article! :)

IF it's entirely true of 20% cooling efficiency loss seems like Intel made a very poor decision on shifting to Paste from Fluxless Solder. I'd need to see that Japanese test substantiated and repeated by a few others before converting myth to fact.

Wages (Time) > kWh
I always get a kick out of efficiency and consumer computing power. In my case, at $0.12/kWh more cores win and shorter processing time is a no brainer - compare an hourly wage of $30~$50/hr+. The efficiency is dramatically more important in mobile computing.

Any of the OC's listed are going to throwing a ton of heat off, and unless you have a very cool room with AC and you can tolerate the subsequent noise -- you need to fully evaluate high OCs. Even with the OCs listed I don't recommend e.g. an H100 unless you're deaf, and instead with those listed OCs I'd look into a better cooling solution i.e. EK, Koolance, etc with a ~1000W radiator with decent fans.
 
[citation][nom]mayankleoboy1[/nom]Nice review!1. Are there plans to release any K CPU's without the HD4000? will they OC higher?2. Any chance of intel releasing a second stepping of K-series IB chips?[/citation]

That would not affect how well they overclock and Intel releases K edition CPUs with the top IGP. The only difference between an 5 with HD 2500, an i5 with HD 4000, and an i7 with HD 4000 is binning. That hardware for HD 4000 and HTT is all there, just disabled because either Intel wanted to sell the chip as a cut-down version to address an under-supply of i5s, or because the chip had a damaged part involved with the IGP that forced Intel to activate it only as HD 2500 instead of 4000. That means that the chip is an inferior chip that would not be sold as a top end overclocking chip, so there is no chance of Intel selling K edition CPUs with HD 2500.

[citation][nom]vilenjan[/nom]Good old Intel. No competition and look what happens, the new generation is barely an upgrade over the previous. Anyone remember Intel PII 450s and the PIII 450s?[/citation]

Everyone knew from the start that Ivy Bridge was not a CPU performance leap over Sandy Bridge. If not for Intel using the crap paste instead of solder or at least better paste, Ivy Bridge would have beaten Sandy Bridge at least in overclocking performance in addition to it's efficiency win. Haswell is the performance leap over Sandy Bridge. Intel has been using the tick-tock strategy for years now and we've all known that Ivy wasn't a big leap, so you're not only a troll, but a fail troll at that.

[citation][nom]ringsTrue[/nom]Without the baseline clock for clock comparison (4.5 sandy vs 4.5 ivy), i'm afraid these results are pretty much useless. It's like doing an uncontrolled experiment and passing it off as real science.[/citation]

That was already done in a previous article and we all know that Ivy has more performance per Hz.

[citation][nom]digiex[/nom]as the manufacturing process gets smaller = Smaller die size, supposed to be cooler temperature,but, with small die size = small area for heat dissipation,...an irony that needs to be solved.[/citation]

Not using such crap paste would have solved that. Leaving it with the solder, Ivy Bridge would have trumped Sandy Bridge greatly in overclocking and even with the higher quality paste that the Japanese site used makes it better than Sandy Bridge.

[citation][nom]A Bad Day[/nom]One possible counter to the rapid thermal ramp up is to remove the die cover and get rid of the thermal paste bottleneck.The hard part is getting the heatsink to fit, and not crush the die chip into silicon sand...[/citation]

If you're willing to cut off the IHS, then you're willing to put in higher quality paste like the Japanese site did which was shown to improve thermals dramatically.

[citation][nom]spookyman[/nom]So I guess Haswell will just 2-5% faster then Ivy Bridge.Sounds like an improvement to me.[/citation]

Haswell will be more like 20% to 35% faster than Ivy Bridge. You trolls just don't learn, do you?

[citation][nom]BVKnight[/nom]Why is the TH test throttling your chip at high 90s-100 C if the TJMax for the Ivy Bridge chips is 105? I thought that the chip wouldn't throttle itself until it hit that limit.[/citation]

They probably didn't use a physical temperature gauge, just a software one. Those aren't as accurate, but using a real gauge can damage the processor (look at Hard OCP's CPU cooler reviews to see how).

http://www.hardocp.com/article/2011/11/17/thermalright_true_spirit_cpu_air_cooler_review/

[citation][nom]jaquith[/nom]Very nice Article! IF it's entirely true of 20% cooling efficiency loss seems like Intel made a very poor decision on shifting to Paste from Fluxless Solder. I'd need to see that Japanese test substantiated and repeated by a few others before converting myth to fact.I always get a kick out of efficiency and consumer computing power. In my case, at $0.12/kWh more cores win and shorter processing time is a no brainer - compare an hourly wage of $30~$50/hr+. The efficiency is dramatically more important in mobile computing. Any of the OC's listed are going to throwing a ton of heat off, and unless you have a very cool room with AC and you can tolerate the subsequent noise -- you need to fully evaluate high OCs. Even with the OCs listed I don't recommend e.g. an H100 unless you're deaf, and instead with those listed OCs I'd look into a better cooling solution i.e. EK, Koolance, etc with a ~1000W radiator with decent fans.[/citation]

20% gain from Intel's paste to higher quality paste. Solder would be even better.
 

There's been so much BS about the IB out there -- again the testing must be repeated and confirmed before I'll believe it. BTW - I've seen that same Flux story since the ES..

One result perks interest, two of the same results makes me feel there's something there, and a third result IMO confirms it...not to mention pisses me off @ Intel! However, contradicting results places it back into the Myth category.

IF the Flux is superior then Intel better damn well use it on the VERY costly IB-E.
 

jnanster

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Way Way WAY too hot.
Bad Intel.
Chip will fail over time as the IHS heating/cooling cycle will act like a pump causing the TIM to fail.
Bad decision on Intel's part.
Sticking with the 2600k on next build or wait for Haswell
 

BSMonitor

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Intel said as much. Similar performance. Less power. Their goal with any new processor is to pack as much HP into a thermal window. And in this case, maybe make that thermal window even smaller. The peak of OC potential is NOT a primary concern.

It is incredibly impressive that IVB @ 4.5GHz set at a lower voltage, clocked 300 MHz below SNB, and ultimately drawing 40W less power performs essentially the same.

 

BSMonitor

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Anyone jumping from one processor arch. to the next on an annual basis and expecting huge returns in performance, clearly doesn't understand the game anyway.

But, Intel and AMD appreciate your continued donations to their bottom lines.
 
[citation][nom]blazorthon[/nom]That would not affect how well they overclock and Intel releases K edition CPUs with the top IGP. The only difference between an 5 with HD 2500, an i5 with HD 4000, and an i7 with HD 4000 is binning. That hardware for HD 4000 and HTT is all there, just disabled because either Intel wanted to sell the chip as a cut-down version to address an under-supply of i5s, or because the chip had a damaged part involved with the IGP that forced Intel to activate it only as HD 2500 instead of 4000. That means that the chip is an inferior chip that would not be sold as a top end overclocking chip, so there is no chance of Intel selling K edition CPUs with HD 2500.[/citation]
They could do the same thing they did with the i5-2550k though - scrap the IGP completely.
 


Anyone who knows much about paste knows that paste is actually not very thermally conductive. There's no need of further testing to say that using something that is less thermally conductive means that the temps will get hotter. I would like more testing too, but to say that it's necessary to prove that Intel's paste is inferior to the previously used solder is wrong. Also, Intel will probably use either better paste or solder (fluxless solder, not solder with flux. Flux would probably reduce the thermal conductivity of the solder) on IB-E, assuming that there is a IB-E.
 

CerianK

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Great article... trying to download Core Temp 1.0 R3 flags as virus by Sophos and won't get through our firewall. Grabbed it (not sure if its R3) from SoftPedia instead (no virus alert), and during the install it throws an NTVDM illegal instruction error. So much for "monitor the temperature of any modern x86 based processor"... Core2 Duo is too old, I guess.
 

BSMonitor

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[citation][nom]ojas[/nom]I sort of agree...wrong to make an efficiency comparison without keeping something constant...[/citation]

Wrong discussion. The article is about max OC. That's the constant.
 

BSMonitor

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[citation][nom]jaquith[/nom]There's been so much BS about the IB out there -- again the testing must be repeated and confirmed before I'll believe it. BTW - I've seen that same Flux story since the ES.. One result perks interest, two of the same results makes me feel there's something there, and a third result IMO confirms it...not to mention pisses me off @ Intel! However, contradicting results places it back into the Myth category.IF the Flux is superior then Intel better damn well use it on the VERY costly IB-E.[/citation]

SNB-E / IVB-E is a completely different die, manufactured based on the Xeon dies. The thermals will be different regardless, and a totally different discussion. But there is NO guarantee, IVB cores will show up as IVB-E. Intel may have named SNB-E in the Core i7- 3### for a reason. The next in this line might be Haswell.
 
Overclocking has gone full circle. It started out as an enthusiasts' hobby, in some cases requiring hardware mods like replacing crystals, moving jumpers, and/or soldering bridges. Then it became a way for anyone to get more performance out of [cheap] hardware.
Now, performance is no longer the issue; a locked i3 or even a "miserable" Athlon II or Llano will meet 95+% of the needs of 95+% of people. It is becoming an enthusiasts' hobby again, doing it for its own sake.
 

belardo

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AMD has intel beat on this one! Hitting 5Ghz with their FX CPUs is soooo easy! Down with intel!!!

But... I get the feeling a 5Ghz FX CPU is still slower than a 3.5Ghz i5-2500/3500 CPU...
 

cookoy

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Can't wait for reviews on IB on notebooks. I think IB improvements over SB were intended to be realized more on the notebook than desktop pc.
 
G

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Given the low power requirements of IB, I tried to see how quiet I could make my PC (with 3570K): At stock speed, I turned off the CPU fan on my Zalman Max cooler. Under full load, max temps went to only 68C (10 degrees more than with fan running).
I then ran tests at max and min CPU fan speeds (800 RPM vs 1600 RPM). Temp difference was a miniscule 1C under load. OC to 4.2 GHz did not change this.

Conclusion:
1) If you want a quiet PC, get IB! It may not OC as well, but for 98% of real-world tasks, the PC is dead quiet even under full load.
2) There is no point in raising fan speeds with IB. The problem is not the amount of heat to dissipate, but how to get the heat out of the chip to the bottom of the cooler.
2) The recommendation in the article to use high-end water cooling probably won't work. There is little heat to dissipate, compared to SB, so the difference in performance between expensive and cheap cooling is probably small. Getting the heat out of the die to the surface of the chip is the problem, and no cooler can help much there.
 
[citation][nom]slicedtoad[/nom]Recommending a closed loop liquid cooler? really?They perform worse than decent air coolers. [/citation]

You missed the point. You don't run a 24/7 OC with your fans running at 100% duty cycle all the time. They stated in the article that the chip was overheating and throttling before the fans could even spin up in time to compensate (much less than a second). Regardless of the size of the radiator, a closed-loop water pump runs 100% rpm all the time and flowing, pressurized water is a superior heatsink for short-term temp spikes. We all know that during sustained 100% loads over a long time, a good closed-loop cooler shows a very similar temp peak as a good air cooler. It's the "flattening" of the more typical-in-the-real-world short spikes where liquid shows its strength.
 
Given the low power requirements of IB, I tried to see how quiet I could make my PC (with 3570K): At stock speed, I turned off the CPU fan on my Zalman Max cooler. Under full load, max temps went to only 68C (10 degrees more than with fan running).
I then ran tests at max and min CPU fan speeds (800 RPM vs 1600 RPM). Temp difference was a miniscule 1C under load. OC to 4.2 GHz did not change this.

Conclusion:
1) If you want a quiet PC, get IB! It may not OC as well, but for 98% of real-world tasks, the PC is dead quiet even under full load.
2) There is no point in raising fan speeds with IB. The problem is not the amount of heat to dissipate, but how to get the heat out of the chip to the bottom of the cooler.
2) The recommendation in the article to use high-end water cooling probably won't work. There is little heat to dissipate, compared to SB, so the difference in performance between expensive and cheap cooling is probably small. Getting the heat out of the die to the surface of the chip is the problem, and no cooler can help much there.

Exactly. The problem isn't too much heat, it's that the heat isn't able to move out of the processor fast enough, presumably because of the paste.
 
Intel needs to be tarred and feathered for giving us a premium, unlocked model that has cheap material where it counts the most. I usually don't believe in conspiracy theories but I'm more than willing to believe claims made against Intel that it intentionally crippled these chips.
 
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