Is this a good voltage for a haswell 4.5ghz overclock?

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dazkyl

dazkyl

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Nov 3, 2013
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I oced my 4670k haswell from stock to 4.5ghz and found that the least stable voltage i could use was 1.284v.

I also set my cache voltage to auto and cpu inputvoltage to 1.9

Any thing i want to set to lower from the input voltage and cache voltage?

As for the vcore i cant go less.

Load line calibration , what level should i set it ? )when i set it to auto , it gives me level1).. Mobo is asrock z87 xtreme6
 
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dazkyl

dazkyl

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Then why do i have to raise such voltage for my system to become stable ? Do i have an unlucky chip ? Because i knows guys with same cpu thats overclocks like me with less voltag , like 1.250v.

Is 1.265v good for 4.5ghz ?
 
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Jonathan Cave

Jonathan Cave

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Each chip is different therefore you must find what is stable and decide if the temps are satisfactory.

the only way i can get 4.4 on my 4670k is :

CPU Ratio: Fixed Mode.
CPU Ratio = 44
Ring Ratio = 40
CPU Core Voltage 1.300
CPU Core Voltage= Override
CPU Ring Voltage = 1.250
CPU Ring Voltage = Override
VCCIN Voltage = 2.1
DRAM Frequency : 1600

Therefore you getting 4.5 @ 1.284v isn't bad at all in my opinion. What temps are you getting ?

if you consider overclocking your memory this will also add heat to the CPU's memory controller - be mindful of that.
 
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dazkyl

dazkyl

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Im on 4.5ghz with 1.9v input voltage and 1.278vcore. Every thing else in on auto. This is the best voltage i can do at this clockspeed.Why did you set the ring ratio to 40 ? i always set that on auto.

Maximum temp i had when playing BF4 on high settings was 80.And yes,i already oced my ram from 1333mhz to 1600 with 1.55dram voltage.
 
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Jonathan Cave

Jonathan Cave

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the closer the ring ratio to the multiplier ratio = better performance (not that we would probably notice!)

READ THIS : http://www.overclock.net/t/1411077/haswell-overclocking-thread-with-statistics - it will answer all your questions and give you a great step by step guide.

Are you stress testing? if not use Prime95 or IBT just watch the temps.

the haswell memory controller is designed for 1333/1600 - therefore your ram o/c won't be an issue here.

What heatsink / fan are you using?

 
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dazkyl

dazkyl

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Yes with prime95 that temperature jumps quickly to 90degrees , but while gaming it does not exceed 80degrees so i base my overclocker on gaming not prime95. cpu cooler is coolermaster v6gt.
 
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Jonathan Cave

Jonathan Cave

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90 Degree's is too hot for me. heat will degrade your chip over time - no one knows WHEN but running at 80 deg vs 60 deg will, over time degrade your chips silicone. If your goal is to retain 4.5ghz, FIRSTLY fine tune your voltages using the guide i've provided above, SECONDLY if heat is still an issue change your HSF. (i have no experience of your HSF)

A little self-education here is needed then a seasoned overclocking pro will be able to provide you advice ONCE you have covered the basics of overclocking the haswell.

 
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