[SOLVED] overclocking 4790k - trying to get 4.8GHz stable. Gigabyte Z97P-D3

WoodyRed

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Dec 3, 2015
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dunno if anyone has any suggestions of other settings I can try, this is my first overclock

i7 4790k
corsair h100x (240mm AIO water cooler)
corsair rm850x PSU
motherboard is Gigabyte Z97P-D3

currently running happily at 4.7GHz on all 4 cores. temps are fine, staying below 80 °C under full load. Using cinebench R23 to test stability.

the only settings Ive changed are

CPU ratio = 47 on all the cores
Vcore voltage is set to 1.295v (1.29v would sometimes crash, 1.295 seems ok)
uncore ratio = 40. (AKA Ring Bus)

when trying for 4.8 - the above settings crash early on in a cinebench test. Ive tried with vcore voltages up to 1.4v - still crashes.

the other setting Ive tried is "VRIN external override" - AKA Input Voltage,VCCIN, Vrin, Eventual Input Voltage - Ive tried using auto setting for that - and manually setting to 1.9v or 1.8v, also tried 4.8GHz on one core then 4.7GHz on the other 3. still get crashes.

Ive used this for information - **link removed - it was the haswell overclocking guide from overclockers. you can google it if you want to know what one.

any other settings I can try ? thanks
 
Last edited:

Zerk2012

Titan
Ambassador
dunno if anyone has any suggestions of other settings I can try, this is my first overclock

i7 4790k
corsair h100x (240mm AIO water cooler)
corsair rm850x PSU
motherboard is Gigabyte Z97P-D3

currently running happily at 4.7GHz on all 4 cores. temps are fine, staying below 80 °C under full load. Using cinebench R23 to test stability.

the only settings Ive changed are

CPU ratio = 47 on all the cores
Vcore voltage is set to 1.295v (1.29v would sometimes crash, 1.295 seems ok)
uncore ratio = 40. (AKA Ring Bus)

when trying for 4.8 - the above settings crash early on in a cinebench test. Ive tried with vcore voltages up to 1.4v - still crashes.

the other setting Ive tried is "VRIN external override" - AKA Input Voltage,VCCIN, Vrin, Eventual Input Voltage - Ive tried using auto setting for that - and manually setting to 1.9v or 1.8v, also tried 4.8GHz on one core then 4.7GHz on the other 3. still get crashes.

Ive used this for information - **link removed - it was the haswell overclocking guide from overclockers. you can google it if you want to know what one.

any other settings I can try ? thanks
That's a rather poor board for overclocking be happy with 4.7
 

Zerk2012

Titan
Ambassador
dunno if anyone has any suggestions of other settings I can try, this is my first overclock

i7 4790k
corsair h100x (240mm AIO water cooler)
corsair rm850x PSU
motherboard is Gigabyte Z97P-D3

currently running happily at 4.7GHz on all 4 cores. temps are fine, staying below 80 °C under full load. Using cinebench R23 to test stability.

the only settings Ive changed are

CPU ratio = 47 on all the cores
Vcore voltage is set to 1.295v (1.29v would sometimes crash, 1.295 seems ok)
uncore ratio = 40. (AKA Ring Bus)

when trying for 4.8 - the above settings crash early on in a cinebench test. Ive tried with vcore voltages up to 1.4v - still crashes.

the other setting Ive tried is "VRIN external override" - AKA Input Voltage,VCCIN, Vrin, Eventual Input Voltage - Ive tried using auto setting for that - and manually setting to 1.9v or 1.8v, also tried 4.8GHz on one core then 4.7GHz on the other 3. still get crashes.

Ive used this for information - **link removed - it was the haswell overclocking guide from overclockers. you can google it if you want to know what one.

any other settings I can try ? thanks
That's a rather poor board for overclocking be happy with 4.7
 

TommyTwoTone66

Prominent
Apr 24, 2021
560
115
590
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Not all chips will go to 4.8, no matter what cooling or motherboard you have or what settings you use. That's just how it is with overclocking, you need a little luck as well as everything else to get a CPU which overclocks well.
 

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