I5 2400 Voltage problem

R

rundll

Registered

​

Joined

Sep 16, 2012

• Sep 17, 2012

• #1

MSI z68ma-g43 mobo
2x4gb 1333 mhz ram
120gb extreme sata 3 ssd
hd 6870 GPU
i5 2400 CPU

On idle my chip i5 2400 uses 0.992 V according to CPU-Z and 0.995 according to Core Temp

On turbo @3.4 it is around 1.36+ V

And this seems to cause overheating

I reinstalled everything.. heatsink, paste 4-5 times and nothing changed

Running prime 95 intel turbo mode on.. CPU gets to TjMAX in a minute

Turned off Intel Turbo Boost

It runs better @3.1 but still close to 1.3 V draw

Chip is 5 months old I got from a friend it still has guarantee. What should I do ? Am I doing something wrong ?

 

redduc900

Inactive Moderator

​

Joined

Dec 17, 2000

Location

Portland, OR

• Sep 17, 2012

• #2

The BIOS automatically sets a ~1.36V Vcore because Turbo is enabled and Vcore is set to Auto, which is way too high a voltage for only a 3.4GHz clock. Take the Vcore setting off Auto, manually adjust it to ~1.15V, then run Prime to check for stability at that voltage.

 

OP

R

rundll

Registered

​

Joined

Sep 16, 2012

• Sep 17, 2012

• Thread Starter
• #3

it looks like a setting called "PLL overvoltage" was causing the problem which was set "AUTO" I disabled it. Now it turbos and voltage is around 1.2. I dont even understand why this damn BIOS sets it to auto.... What if this computer belonged to someone who never would understand about it. Would probably kill the CPU or burn the computer.

It even took me an hour to figure it out

 

redduc900

Inactive Moderator

​

Joined

Dec 17, 2000

Location

Portland, OR

• Sep 17, 2012

• #4

So I assume the BIOS doesn't offer a Vcore option?

 

OP

R

rundll

Registered

​

Joined

Sep 16, 2012

• Sep 17, 2012

• Thread Starter
• #5

redduc900 said:

So I assume the BIOS doesn't offer a Vcore option?

Click to expand...

it does offer auto but I have it set to +0.0000

This CPU runs much hotter than my previous i3 2130... I wish I never replaced it...

at least 10 degrees difference

 

redduc900

Inactive Moderator

​

Joined

Dec 17, 2000

Location

Portland, OR

• Sep 17, 2012

• #6

Then just set it to a negative offset to equal ~1.15V, and leave Internal PLL Overvoltage set to Auto.

 

OP

R

rundll

Registered

​

Joined

Sep 16, 2012

• Sep 17, 2012

• Thread Starter
• #7

redduc900 said:

Then just set it to a negative offset to equal ~1.15V, and leave Internal PLL Overvoltage set to Auto.

Click to expand...

cant set it less than zero .. is there something i need to chane before i set it negative amounts ?

 

redduc900

Inactive Moderator

​

Joined

Dec 17, 2000

Location

Portland, OR

• Sep 17, 2012

• #8

Just to verify... are you trying to change it via the +/- keys on the KeyPad?

 

OP

R

rundll

Registered

​

Joined

Sep 16, 2012

• Sep 17, 2012

• Thread Starter
• #9

redduc900 said:

Just to verify... are you trying to change it via the +/- keys on the KeyPad?

Click to expand...

When I click on Core VOltage options a list is opened it starts with "Auto" option and comes +0 following auto and so on... there are no minus numbers I tried pushing minus but it didnt work

 

OP

R

rundll

Registered

​

Joined

Sep 16, 2012

• Sep 17, 2012

• Thread Starter
• #10

by the way now it seems cpu is not getting past 3.2 ghz

this cpu supposed to turbo @ 3.4

it was doing so when internal PLL overvoltage was on

 

jason4207

Senior Member

​

Joined

Nov 26, 2005

Location

Concord, NC

• Sep 17, 2012

• #11

I've seen some boards have an option to select positive or negative offset. Then you set the offset amount as a separate option.

Turn Turbo Boost back on if you want it to turbo to 3.4.

Leave PLL overvoltage off.

 

OP

R

rundll

Registered

​

Joined

Sep 16, 2012

• Sep 18, 2012

• Thread Starter
• #12

jason4207 said:

I've seen some boards have an option to select positive or negative offset. Then you set the offset amount as a separate option.

Turn Turbo Boost back on if you want it to turbo to 3.4.

Leave PLL overvoltage off.

Click to expand...

Turbo boost is on however it never seems to exceed a clock of 3.2...

My values are now so

Turbo Boost: ON
PLL overvoltage: OFF
Core Voltage: Auto

On idle it is around 45 degrees C
On load games 70 degrees C up to 75 C

Ambient temperature is around 25 degrees

 

jason4207

Senior Member

​

Joined

Nov 26, 2005

Location

Concord, NC

• Sep 18, 2012

• #13

Can you post pics of your BIOS options?

 

OP

R

rundll

Registered

​

Joined

Sep 16, 2012

• Sep 20, 2012

• Thread Starter
• #14

jason4207 said:

Can you post pics of your BIOS options?

Click to expand...

I ll do it as soon as I can reach my BIOS from windows 7. it is MSI click BIOS 2 I must be able to find a way to reach BIOS on Win 7 but I could not find the utility. MOBO z68ma-g43

 

redduc900

Inactive Moderator

​

Joined

Dec 17, 2000

Location

Portland, OR

• Sep 20, 2012

• #15

The Click BIOS is just MSIs name for the UEFI, so just like any BIOS or UEFI, it's accessed during POST.

 

OP

R

rundll

Registered

​

Joined

Sep 16, 2012

• Sep 20, 2012

• Thread Starter
• #16

jason4207 said:

Can you post pics of your BIOS options?

Click to expand...

 

OP

R

rundll

Registered

​

Joined

Sep 16, 2012

• Sep 20, 2012

• Thread Starter
• #17

this is almost my BIOS except there is no CPU i o voltage option and there is no vdroop control