Overclock.net › Forums › Intel › Intel Motherboards › Temp Puzzler
New Posts  All Forums:Forum Nav:

Temp Puzzler

post #1 of 8
Thread Starter 
Hi respected Clockers

I have a bit of a puzzler here. Whilst O/Cing my E6400 I have noticed that by moving from an FSB of 415Mhz to 425Mhz to end up with a nice overclock my CPU core temps have actually dropped.

Now to get this clock i have had to up from 1.5v Vcore to 1.5125v Vcore to achieve my stable 425Mhz resulting in a nice 3.4Ghz for this CPU.

At 415Mhz my load temps settled at around 55oC but taking that extra step to 425Mhz now leaves me with a 45oC load temp. Which for me is nice on aircooling even though I have had to up the voltage on Vcore.

Puzzles me that. Its running faster with more juice yet a whole 10oC cooler. Is there a "sweet spot" with the core 2 Duo chips and can i now start to think of squeezing more out of this puppy.

Your thoughts appreciated.

Tes
Bloo Moon
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k ASUS P8P67 Pro MSI GTX570 Twin Foz III 8Gb Corsair Vengence 9-9-9-24-C9 
Hard DriveOSMonitorPower
Crucial M4 128Gb SSD W7 64 bit HPw2408h OCZ 900w 
Case
Cosmos S 
  hide details  
Reply
Bloo Moon
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k ASUS P8P67 Pro MSI GTX570 Twin Foz III 8Gb Corsair Vengence 9-9-9-24-C9 
Hard DriveOSMonitorPower
Crucial M4 128Gb SSD W7 64 bit HPw2408h OCZ 900w 
Case
Cosmos S 
  hide details  
Reply
post #2 of 8
Not sure if the C2D's have this feature or not, but I remember P4's had a throttle that would underclock the processor if it got too hot. Make sure it's not throttling down.
$265 MacBook Pro
(13 items)
 
  
CPUMotherboardGraphicsRAM
2.8GHz Core 2 Duo POS GeForce 9400M/9600GT M 4GB 1066MHz DDR3 
Hard DriveOptical DriveOSMonitor
500GB Western Digital Slot-loading thing OS X Snow Leopard 1440x900 glossy thing 
KeyboardPowerCase
Broken-backlit chiclet-type Awkwardly-shaped wall wart Aluminum block 
  hide details  
Reply
$265 MacBook Pro
(13 items)
 
  
CPUMotherboardGraphicsRAM
2.8GHz Core 2 Duo POS GeForce 9400M/9600GT M 4GB 1066MHz DDR3 
Hard DriveOptical DriveOSMonitor
500GB Western Digital Slot-loading thing OS X Snow Leopard 1440x900 glossy thing 
KeyboardPowerCase
Broken-backlit chiclet-type Awkwardly-shaped wall wart Aluminum block 
  hide details  
Reply
post #3 of 8
Could it be that your ambient temp dropped quite abit? Ambient (room) temp has a huge effect on air cooling.

EDIT: Oh and do you have the power saving things enabled. that drop the vcore and multi when not at full load?
post #4 of 8
Quote:
Originally Posted by pheoxs View Post
Could it be that your ambient temp dropped quite abit? Ambient (room) temp has a huge effect on air cooling.
10c? that'd be an obvious reason as to why it'd be running colder... that sounds like you're insulting his/her intelligence...
$265 MacBook Pro
(13 items)
 
  
CPUMotherboardGraphicsRAM
2.8GHz Core 2 Duo POS GeForce 9400M/9600GT M 4GB 1066MHz DDR3 
Hard DriveOptical DriveOSMonitor
500GB Western Digital Slot-loading thing OS X Snow Leopard 1440x900 glossy thing 
KeyboardPowerCase
Broken-backlit chiclet-type Awkwardly-shaped wall wart Aluminum block 
  hide details  
Reply
$265 MacBook Pro
(13 items)
 
  
CPUMotherboardGraphicsRAM
2.8GHz Core 2 Duo POS GeForce 9400M/9600GT M 4GB 1066MHz DDR3 
Hard DriveOptical DriveOSMonitor
500GB Western Digital Slot-loading thing OS X Snow Leopard 1440x900 glossy thing 
KeyboardPowerCase
Broken-backlit chiclet-type Awkwardly-shaped wall wart Aluminum block 
  hide details  
Reply
post #5 of 8
Quote:
Originally Posted by pheoxs View Post
Could it be that your ambient temp dropped quite abit? Ambient (room) temp has a huge effect on air cooling
I agree with you, I'm pretty sure it's because the paste have setting down (cure) or it's the ambient temp.
post #6 of 8
Quote:
Originally Posted by KloroFormd View Post
10c? that'd be an obvious reason as to why it'd be running colder... that sounds like you're insulting his/her intelligence...
i'm sure pheoxs didn't meant it that way. just let get back to solving this werid temp drop.
post #7 of 8
Thread Starter 
well thanks for the input but so far I think we are drawing blanks.

As for room temp we can rule that out as when i run at the lower FSB it gets hotter, when i raise the FSB to 425Mhz we get an instant temp drop by 10oC. If i go back to the lower 415oC we jump up by 10oC.

Again gotta rule out compound "setting" as this CPU has been in here for 2 months now.

I have run stability tests now for almost 10 hours without a blink at the higher FSB.

By the way - I'm a SHE

No insults taken and thx for your inputs to date.

Tes
Bloo Moon
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k ASUS P8P67 Pro MSI GTX570 Twin Foz III 8Gb Corsair Vengence 9-9-9-24-C9 
Hard DriveOSMonitorPower
Crucial M4 128Gb SSD W7 64 bit HPw2408h OCZ 900w 
Case
Cosmos S 
  hide details  
Reply
Bloo Moon
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k ASUS P8P67 Pro MSI GTX570 Twin Foz III 8Gb Corsair Vengence 9-9-9-24-C9 
Hard DriveOSMonitorPower
Crucial M4 128Gb SSD W7 64 bit HPw2408h OCZ 900w 
Case
Cosmos S 
  hide details  
Reply
post #8 of 8
It could be to do with the NB strap @1666 MHz (416.5MHz x4), with the NB loosening its timings the CPU probably does a little less work also.

Do some bentchies at 415 and then at 425 to see if there is much difference.

regards,
Danny
The Beast
(13 items)
 
  
CPUMotherboardGraphicsRAM
Conroe E6420 AB9-Pro X1950 Pro 2GB OCZ Platinum (PC2-6400) 
Hard DriveOptical DriveOSMonitor
2*80GB, 2*250GB RAID0 Pioneer 110D Linux, Vista Dual Boot 19" TFT 6ms 
  hide details  
Reply
The Beast
(13 items)
 
  
CPUMotherboardGraphicsRAM
Conroe E6420 AB9-Pro X1950 Pro 2GB OCZ Platinum (PC2-6400) 
Hard DriveOptical DriveOSMonitor
2*80GB, 2*250GB RAID0 Pioneer 110D Linux, Vista Dual Boot 19" TFT 6ms 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel Motherboards
Overclock.net › Forums › Intel › Intel Motherboards › Temp Puzzler