4790K @ 4.8 Ghz OC Help

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Thrill3R

Thrill3R

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Jul 30, 2013
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Hello,
I am running my 4790k @ 4.6 Ghz with vCore 1.140; BCLK 100 Mhz; Cache Ratio 40x all stable with Max temp. 65C and I am using Cinebench for testing. Now my problem is that I can't go above 4.6 Ghz, even at 4.7 Ghz 1.3 Vcore it will crash during Benchmarking.

I am new to overclocking and have only done basic OC in past and trying to hit 4.8 Ghz on this CPU but nothing would work at all. It would boot @ 5.0 Ghz but only 4.6 Ghz survives testing; As I already mentioned I am new to Overclocking I have not played much with Cache Ratio and Cache Voltage. I need to know what am I doing wrong and what settings I need to put to achieve 4.8 Ghz or is it my Hardware not letting CPU past its limits.

I use ASUS AI Suite to test OC settings On the Go and once I get something stable I put settings in BIOS.

Intel Core i7 4790k
ASUS Z97K
Corsair Vengeance 8 GB x 2 @ 1600 Mhz
Hyper 212x/Corsair H100i (Currently on H100i trying to achieve 4.8 but 4.6 working fine with 212x)

JNvYvVdKS5KALjkjw29uCw.png

LZfjIolqQxqwE6HSh2qarA.png





Please let me know if any further info is needed.
 
Solution
faalin


Its going to come down to how much you care about your computer and parts. You're running just fine at 4.6Ghz @ 1.14v, set the cpu for 4.7Ghz and then just slowly bump the voltage till it stable during testing. If you dont feel safe going over 1.3v then you found your limit and wont be able to get 4.7ghz out of your cpu.


When OC'ing you have to pay to play, ether live with what you have or try pushing for that 4.7Ghz and risk killing something.

I found out the hard way with...
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WildCard999

WildCard999

Titan
Moderator
Jul 18, 2014
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This guide by CompuTronix should help.

"When tweaking your processor near it's highest overclock, keep in mind that for an increase of 100 MHz, a corresponding increase of about 50 millivolts (0.050) is needed to maintain stability. If 75 to 100 millivolts or more is needed for the next stable 100 MHz increase, it means your processor is overclocked beyond it's capability."

http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

Also it depends on silicon lottery as far as how well your CPU can overclock, some do better then others even with the same hardware (CPU Cooler/Motherboard).

Also if your testing with Prime95 make sure its version 26.6 and I usually test with Small FFT's for 15-30 min.
 
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faalin

faalin

Illustrious
Feb 22, 2012
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I would be happy where you're at. The average voltage for 4.7Ghz is around 1.450v, most CPU's will hit a wall where to get that next 100mhz is a ton of voltage and looks like you hit that point.

You have to weigh the pros and cons for that extra 100-200Mhz, is that extra speed worth the high voltages, heat, and shorter life span of the cpu.
 
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Thrill3R

Thrill3R

Honorable
Jul 30, 2013
23
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10,520
I am trying to OC just for the sake of it.. Until now I have seen no Game/Software using CPU that much. I'm just wondering if it's something related to cache settings I'm not adjusting right?

P.S. I'm sorry I voted down the above answer by mistake.
 
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faalin

faalin

Illustrious
Feb 22, 2012
6,038
384
41,240


Its going to come down to how much you care about your computer and parts. You're running just fine at 4.6Ghz @ 1.14v, set the cpu for 4.7Ghz and then just slowly bump the voltage till it stable during testing. If you dont feel safe going over 1.3v then you found your limit and wont be able to get 4.7ghz out of your cpu.


When OC'ing you have to pay to play, ether live with what you have or try pushing for that 4.7Ghz and risk killing something.

I found out the hard way with a i7 950, had it running very nicely at 4.6Ghz but wanted to see how far it would go. At 4.7Ghz i nuked the motherboard, $400 later and a full cover waterblock i was able to hit 4.9Ghz
 
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