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Overclocking study – Intel Core i7 4790K & Intel Pentium G3258 – air, water, phase-change, DICE & LN2

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Architecturally speaking the Core i7 4790K is the same as the Core i7 4770K, released more than a year ago. One of the problems regarding Haswell generation processors is the exponential rising of the temperature with the increase of the voltage supplied. This is due to reduced size of the die combined with the use of not so good TIM between the die and IHS. Even if you have a very good CPU cooler you will see the temperatures rising very fast once you stress the CPU, because the heat couldn’t be transferred fast enough from the die to the cooler base (bear in mind that you have the following structure: die -> Intel TIM -> IHS -> your TIM -> cooler).

The Core i7 4790K is running at a base frequency of 4GHz with the Turbo Boost allowing it to reach 4.4GHz for light single-threaded applications. This means the 4790K will be a much faster CPU out-of-the-box than the existing 4770K which is running 500MHz lower. For this frequency to be possible, Intel had to raise the VID for the CPU’s and do something about the heat problems and. The solution came through a new and improved TIM between the die and the IHS, although it will have been better if the IHS was soldered to the die like in the Sandy Bridge era.

4790k_specs

Although Core i7 4790K is a performance monster, the real star of the show is the dual-core, non Turbo Boost Pentium Anniversary Edition. With a price tag of only 72$, the Pentium G3258 is a fully unlocked dual-core Haswell based CPU, having the operating frequency set at 3.2GHz for a TDP of only 53W. The frequency doesn’t really matter because having only 2 cores it will probably overclock like crazy and nobody will keep it at default clocks.

pentium-anniversary

64 comments la: Overclocking study – Intel Core i7 4790K & Intel Pentium G3258 – air, water, phase-change, DICE & LN2

    1. 1 – At what frequency did the Pentium G3258 ran fully stable using extreme water cooling?
      5126MHz
      2 – What maximum frequency did we achieve on Intel Core i7 4790K using LN2?
      6346MHz

      Reply
    2. Salomiea Marius wrote on:

      1-5250MHz
      2-6346MHz

      Reply
    3. Augustin Carnu wrote on:

      5126 Mhz fully Stable on extreme WaterCooling
      6346.53 Mhz maximum freqeuncy on 4790K LN2.

      Reply
    4. Ionita Bogdan Constantin wrote on:

      1) 5126MHz fully stable
      2) 6346MHz LN2

      Reply
    5. Dulgheriu Alexandru wrote on:

      1 – 5126MHz
      2 – 6346MHz

      Reply
    6. Ungureanu Lucian wrote on:

      1- 5126MHz
      2- 6346MHz

      Reply
    7. Prisecaru Gabriel wrote on:

      1. 5352 MHz
      2. 6346 Mhz

      Reply
    8. Ovidiu Bonte wrote on:

      1 – At what frequency did the Pentium G3258 ran fully stable using extreme water cooling?

      Answer: 5126MHz !

      2 – What maximum frequency did we achieve on Intel Core i7 4790K using LN2?

      Answer: 6346 MHZ!

      Reply
    9. Zacchaeus Lim wrote on:

      Hi there my answers are
      1.5250.91 mhz on ewc for G3258
      2.6346.53mhz on ln2 CPU-Z validated

      Reply
    10. Raul wrote on:

      1 – At what frequency did the Pentium G3258 ran fully stable using extreme water cooling? Answer is : 5250MHz
      2 – What maximum frequency did we achieve on Intel Core i7 4790K using LN2? Answer is : 6346MHz

      Reply
    11. Halian wrote on:

      1) 5126 MHz
      2) 6346 MHz

      Reply
    12. Giancarlo Dalmedico wrote on:

      1 – At what frequency did the Pentium G3258 ran fully stable using extreme water cooling?
      A: 5126 MHz

      2 – What maximum frequency did we achieve on Intel Core i7 4790K using LN2?
      A: 6346 MHz

      Reply
    13. Aurelian Niculita wrote on:

      1. 5126 MHz.
      2. 6346 Mhz.

      Reply
    14. Georgiana D wrote on:

      1 – 5126MHz
      2 – 6346MHz

      Reply
    15. The contest has ended, we will announce the winner tomorrow

      Reply
    16. You had to go up to like 1.35V or higher to get your 4790k to almost 4.8ghz?
      I set my BCLK has high as it would go at stock (101.5), set voltage to 1.30 fixed, set multiplier to 50, knocked it down until it would boot (48), knocked it down to temperature within operating ranges (47), and then tweaked the voltage down until it stopped, then set it to Adaptive, with a max of just above where it stopped.

      result: 1.23V 4770.5MHz

      Then I bumped CPU Cache till it wouldn’t work anymore, at 45x.

      Max temp at 86 degrees. No matter what I set voltages to I can’t get it to operate at 48x without it constantly going into thermal throttle. Works fine at 47x.
      I can even get it to do 48x on one core, so long as I don’t start up GTA V.

      Reply

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