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Core i7 4770K Overclocking General Question

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  • Overclocking
  • CPUs
  • Corsair
Last response: in CPUs
September 25, 2013 12:19:10 AM

I've recently put together a new PC ($3000) and I've been tinkering with OCs on this new chip. Anyway, getting to the point.

When ocing, I can get the 4770K to 4.4GHz stable at 1.18v on an H100i. However, when I attempt 4.5GHz at 1.25v it craps out.

I know the chips vary greatly, and this is using numbers I've been experimenting with, but it seems a bit too much voltage to demand for such a small gain so early in ocing. Any ideas as to the cause?

Current build:

Intel Core i7 4770K
Corsair H100i
Corsair Dominator Pro 16GB (4x4GB) 1866 RAM
Corsair Obsidian 550D
Corsair HX1050 PSU
Asus Sabertooth Z87
Arctic Silver 5

(All relevant parts listed.)

More about : core 4770k overclocking general question

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a b K Overclocking
a b à CPUs
September 25, 2013 12:40:20 AM

maybe you've hit the limit, or maybe you need to bump up other voltages aside from cpu voltage.
just some ideas, im not an expert with these.

luck plays a part when overclocking :) 
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September 25, 2013 12:43:01 AM

1.8V!!!!!!!!! Remind me not to buy a second hand processor from you!

I would try reducing ram speeds if it is unstable
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September 25, 2013 12:44:28 AM

Cons29 said:
maybe you've hit the limit, or maybe you need to bump up other voltages aside from cpu voltage.
just some ideas, im not an expert with these.

luck plays a part when overclocking :) 


That's what I'm afraid of. I love the performance this chip offers but in terms of raw power, my i5 2500K outperforms and that's disturbing.

I thought I hit the limit, too. But I'm hoping someone else has ran into this issue and surpassed it.

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September 25, 2013 12:50:35 AM

bumnut53 said:
1.8V!!!!!!!!! Remind me not to buy a second hand processor from you!

I would try reducing ram speeds if it is unstable


I obviously meant 1.18v.

I tried reducing RAM timings, speed, and voltages, and it showed no actual improvement in stability.

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September 25, 2013 1:10:28 AM

snowzsan said:
bumnut53 said:
1.8V!!!!!!!!! Remind me not to buy a second hand processor from you!

I would try reducing ram speeds if it is unstable


I obviously meant 1.18v.

I tried reducing RAM timings, speed, and voltages, and it showed no actual improvement in stability.



Reducing the voltage will make it worse, maybe you have hit the limit like the guy above said. If you buy a overclocked bundle with a 4770k they are usually 4.4Ghz
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a b à CPUs
September 25, 2013 1:44:20 AM

snowzsan said:
I've recently put together a new PC ($3000) and I've been tinkering with OCs on this new chip. Anyway, getting to the point.

When ocing, I can get the 4770K to 4.4GHz stable at 1.18v on an H100i. However, when I attempt 4.5GHz at 1.25v it craps out.

I know the chips vary greatly, and this is using numbers I've been experimenting with, but it seems a bit too much voltage to demand for such a small gain so early in ocing. Any ideas as to the cause?

Current build:

Intel Core i7 4770K
Corsair H100i
Corsair Dominator Pro 16GB (4x4GB) 1866 RAM
Corsair Obsidian 550D
Corsair HX1050 PSU
Asus Sabertooth Z87
Arctic Silver 5

(All relevant parts listed.)


Right, play around, you can up the voltage to 1.35v-1.4v max so keep trying, not all CPUs can handle high overclocks, maybe youve hit the limit.

But try to play around this the LLC %... Start lower and raise it and see if you become more stable (Load-Line Calibration will give you extra power for overclocking when your CPU is at load and needs it)

Go upto 1.4v, find your highest overclock and leave it at that.

If I have answered your question, please click 'Pick as the Solution'
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a b K Overclocking
a c 352 à CPUs
September 25, 2013 2:01:42 AM

As above, you can usually squeeze more out if you play around with the vcore and LLC. However, when you reach this "wall" why not keep it at that point, as the cpu is "happy" - the voltage is low, the speed is good. Most of the time its not worth the extra voltage and heat for another 1-200mhz IMO.
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a b K Overclocking
a c 352 à CPUs
September 25, 2013 2:04:39 AM

snowzsan said:
Cons29 said:
maybe you've hit the limit, or maybe you need to bump up other voltages aside from cpu voltage.
just some ideas, im not an expert with these.

luck plays a part when overclocking :) 


That's what I'm afraid of. I love the performance this chip offers but in terms of raw power, my i5 2500K outperforms and that's disturbing.

I thought I hit the limit, too. But I'm hoping someone else has ran into this issue and surpassed it.





It probably doesnt though. You have to be at something like 500mhz higher on sandybridge to get the same performance. Plus the 4770 has more cache and HT.

The 2500k is a great chip though, im still using mine. What made you upgrade? I havent felt the need to upgrade yet.
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September 25, 2013 6:07:40 AM

RobCrezz said:
snowzsan said:
Cons29 said:
maybe you've hit the limit, or maybe you need to bump up other voltages aside from cpu voltage.
just some ideas, im not an expert with these.

luck plays a part when overclocking :) 


That's what I'm afraid of. I love the performance this chip offers but in terms of raw power, my i5 2500K outperforms and that's disturbing.

I thought I hit the limit, too. But I'm hoping someone else has ran into this issue and surpassed it.





It probably doesnt though. You have to be at something like 500mhz higher on sandybridge to get the same performance. Plus the 4770 has more cache and HT.

The 2500k is a great chip though, im still using mine. What made you upgrade? I havent felt the need to upgrade yet.


No particular reason for upgrading. I still use my i5 build because it's effective. But I wanted to build, and so I built this.
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a b K Overclocking
a c 352 à CPUs
September 25, 2013 7:07:20 AM

snowzsan said:
RobCrezz said:
snowzsan said:
Cons29 said:
maybe you've hit the limit, or maybe you need to bump up other voltages aside from cpu voltage.
just some ideas, im not an expert with these.

luck plays a part when overclocking :) 


That's what I'm afraid of. I love the performance this chip offers but in terms of raw power, my i5 2500K outperforms and that's disturbing.

I thought I hit the limit, too. But I'm hoping someone else has ran into this issue and surpassed it.





It probably doesnt though. You have to be at something like 500mhz higher on sandybridge to get the same performance. Plus the 4770 has more cache and HT.

The 2500k is a great chip though, im still using mine. What made you upgrade? I havent felt the need to upgrade yet.


No particular reason for upgrading. I still use my i5 build because it's effective. But I wanted to build, and so I built this.



Cool. What speed do you run your 2500k at, and with what cooler?

I really think the 2500k/2600k/2700k will be remembered as a landmark chip - With a decent overclock I suspect it will be very capable for games for a very long time.
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September 25, 2013 12:35:49 PM

RobCrezz said:
snowzsan said:
RobCrezz said:
snowzsan said:
Cons29 said:
maybe you've hit the limit, or maybe you need to bump up other voltages aside from cpu voltage.
just some ideas, im not an expert with these.

luck plays a part when overclocking :) 


That's what I'm afraid of. I love the performance this chip offers but in terms of raw power, my i5 2500K outperforms and that's disturbing.

I thought I hit the limit, too. But I'm hoping someone else has ran into this issue and surpassed it.





It probably doesnt though. You have to be at something like 500mhz higher on sandybridge to get the same performance. Plus the 4770 has more cache and HT.

The 2500k is a great chip though, im still using mine. What made you upgrade? I havent felt the need to upgrade yet.


No particular reason for upgrading. I still use my i5 build because it's effective. But I wanted to build, and so I built this.



Cool. What speed do you run your 2500k at, and with what cooler?

I really think the 2500k/2600k/2700k will be remembered as a landmark chip - With a decent overclock I suspect it will be very capable for games for a very long time.


4.8GHz @ 1.35v with a Corsair H60 Push-Pull exhaust. Never broke 78C priming.
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