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4790k oc from 4.7 to 4.8 probs

Goodey
Level 7
Hi,

I am running 4.7ghz at the voltage in my siggy perfectly fine but going to 4.8ghz is proving to be a weird mystery. it basically refuses to load windows with the voltage set to 1.25v. yet i can run stock voltage on 4.7 no problem. do you think its the imc struggling to run 2400mhz with that oc or is it the processor refusing it... just cant see how its the 100mhz increase would cause a drastic voltage increase just for 100mhz
Main Rig
i7 4790k OC 4.7GHZ 1.215V SilverStone TD02 WC
Asus Maximus VI Hero
Corsair Vengeance Pro 2400Mhz 16Gb
Msi 970oc Edition 4gb
2 SSD 120gb + 1TB SSHD
Seasonic 850w
Windows 7 Ult x64

3,287 Views
3 REPLIES 3

Nate152
Moderator
Hello Goodey

Try giving it a little more cpu core voltage, you may need up to 1.30v to achieve stability.

You could be at the wall where your cpu will need a lot more voltage to hit the next 100MHz, so you may even need a little more than that. You have a very good 4790k, keep an eye on your temps.

Nate152 wrote:
Hello Goodey

Try giving it a little more cpu core voltage. You may need up to 1.30v to achieve stability.

You could be at the wall where your cpu will need a lot more voltage to hit the next 100MHz, so you may even need a little more than that. You have a very good 4790k, keep an eye on your temps.


Hi Nate thanks for your reply.

Temps at 1.250v is at 71c max per core. whats the max safe limit? 85c?
Main Rig
i7 4790k OC 4.7GHZ 1.215V SilverStone TD02 WC
Asus Maximus VI Hero
Corsair Vengeance Pro 2400Mhz 16Gb
Msi 970oc Edition 4gb
2 SSD 120gb + 1TB SSHD
Seasonic 850w
Windows 7 Ult x64

Nate152
Moderator
I personally don't like to see temps over 75c.

ROG realbench is an excellent program to test for stability and doesn't run the cpu nearly as hot as prime95 or aida64. You can give that a try if you like.

After stress testing play a game to see what temps are. If you are at 75c or below you are good to go.