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Intel Core i7-7740K "Kaby Lake-X" Cracks 7.50 GHz on Liquid Helium

btarunr

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TeamAU with GIGABYTE OC Lab successfully overclocked an Intel Core i7-7740K "Kaby Lake-X" quad-core processor to 7.50 GHz. Only 2 out of its 4 cores were enabled for the feat. A Gigabyte X299 SOC Champion was used for this feat, and liquid helium was used to keep the CPU cool. The overclockers dialed kept the base-clock constant at 100 MHz, while dialing up its multiplier to 75.0x, yielding 7.50 GHz. Its core-voltage was kept at 1.096V.



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eidairaman1

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Still can't get it far enough. CPUID site.
 
[XC] Oj101

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1.096v? Hahahaha absolutely not xD
 
C

Chaitanya

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Didnt Amd cpus hit 8ghz+ on two cores and on LN2 which is far hotter than liquid He. So yeah nothing special really.
 
birdie

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Do CPU OC feats with disabled cores impress you?
Click to expand...

A missing option: I don't care about OC'ing and OC'ers. It's like a competition in eating as much as you possibly can - some people find it amusing and interesting, just not me.
 
cdawall

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Chaitanya said:
Didnt Amd cpus hit 8ghz+ on two cores and on LN2 which is far hotter than liquid He. So yeah nothing special really.
Click to expand...

This has quite a bit higher IPC than AMD's BD/PD chips.
 
R

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For me it's only exciting if it's ALL CORES. With 80% of cores disabled, you're not really overclocking the same CPU anymore...
 
Rahnak

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RejZoR said:
For me it's only exciting if it's ALL CORES. With 80% of cores disabled, you're not really overclocking the same CPU anymore...
Click to expand...

This is the 4c/8t model, so it's only 50%. But I share the opinion, all cores/features or go home.
 
Prima.Vera

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How can you occ that high without increasing the voltage????????????????????????????????????????
 
E

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Benchmark Scores Faster than yours... I'd bet on it. :)
birdie said:
A missing option: I don't care about OC'ing and OC'ers. It's like a competition in eating as much as you possibly can - some people find it amusing and interesting, just not me.
Click to expand...
Its not a poll. Cool story... keep the hate to yourself, or at least, not in a thread about LN2/LHe overclocking....we get it... you say that when you can it seems.
Prima.Vera said:
How can you occ that high without increasing the voltage????????????????????????????????????????
Click to expand...
Its not obvious that isn;t reading right? And in the article it says 1.99V I believe?
EDIT: Some article said 1.99V I think... need to dig it up, lol!

Bruno Vieira said:
It looks like que autor of this article doesnt know that cpu-z or any other software solution monitoring doesnt work at XOC.
Click to expand...
It works when XOC... its just CPUz isn't updated for the latest platform.... and the author doesn't seem to know that either. And seems to think its logical that less than stock voltage gives 75% overclocks.

Also typos in the 5 sentences... Oy vey... have someone fact check and proofread before putting things up... :)
 
Last edited:
Prima.Vera

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EarthDog said:
Its not obvious that isn;t reading right? And in the article it says 1.99V I believe?
Click to expand...
I must be blind, but I cannot find any reference to 1.99V...
 
E

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Benchmark Scores Faster than yours... I'd bet on it. :)
Ninja edited... its in some article I read about this, just not the one linked.

Point is, CLEARLY 1.096v wouldn't do it....
 
infrared

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Liquid nitrogen = -196c, Liquid helium = -268.9c. Cold ! :twitch:

Is liquid helium any more challenging than LN2? Or just more expensive? Thinking along the lines of thermal paste, cold bugs etc? It's pretty incredible how far they got this kaby, although I dunno how I feel about disabling 2 cores to get there.
 
E

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Benchmark Scores Faster than yours... I'd bet on it. :)
MUCH more challenging than ln2. You need a special dispenser from tbe tank to tbe pot that costs am arse load. Cpus are delidded and re timd so the seal doesnt break (done with ln2 as well). Its an expensive pita.

Again, cores dont matter... they were going for clocks. They will do this fkr single threaded benchmarks too. ;)
 
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Does it still count if it's an ES chip and only two cores?
 
[XC] Oj101

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pky said:
AND he did it with all cores and HT enabled, which is even more impressive.
Click to expand...

It's not like the chip could run benchmarks at 7.56GHz so I really don't get why most people care about the number of cores. 4 cores with HT that will crash if you look at them wrong and 1 core that crashes if you look at it wrong is equally useless.

Personally I'd be interested to see what the 7.56G chip can do with no HT and only 1 core.
 
eidairaman1

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E

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Benchmark Scores Faster than yours... I'd bet on it. :)
[XC] Oj101 said:
You can in Elite League.
Click to expand...
Good point... forgot about that. They wanted me in there because I get a (single) ES for review... basically told them to kiss it as I am not sponsored or get any other help like those guys do.
 
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