Overclock.net › Forums › Intel › Intel CPUs › Confusion between Cooling and Voltage..
New Posts  All Forums:Forum Nav:

Confusion between Cooling and Voltage..

post #1 of 11
Thread Starter 
Hi, this question popped up in my mind every so often.
As some overclocker might say, "If you have better cooling, your processor will last long, and overclock higher"

But what im confused about is.

If i for example. have nitrogen cooling 24/7, having my voltage at 1.75v, 24/7. How long you think the processor will last..? (i have no idea how cold the processor will be, under nitrogen cooling..temperature is -300F

[>_> it's just an example, to clear your confusion.. if you don't understand what i'm trying to say]


Comparing to a Q6700 Under watercooling at 1.55v 24/7..? [I can say.. AVG temperature is 30C [86F] for all cores..


Which one you think will last longer.. the one with nitrogen cooling.. or plain h20 cooling?
Xtasy's System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6700 @ 3.8 ghz // 1.46 vCore 24/7 Evga nForce 780i SLI w/ PencilMod BFG GTX260 4GB Dominator's @ 4/4/4/8-1T, 1066mhz. 
Hard DriveOSMonitorKeyboard
Seagate 300GB// Sata 3.0 [Raptor X on the way!] Window XP SP2 32Bit [64bit soon!] 21.6' Samsung 216BW G11 
PowerCaseMouseMouse Pad
700W OCZ XSTREAM Antec 900 G5 Beachside 
  hide details  
Reply
Xtasy's System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6700 @ 3.8 ghz // 1.46 vCore 24/7 Evga nForce 780i SLI w/ PencilMod BFG GTX260 4GB Dominator's @ 4/4/4/8-1T, 1066mhz. 
Hard DriveOSMonitorKeyboard
Seagate 300GB// Sata 3.0 [Raptor X on the way!] Window XP SP2 32Bit [64bit soon!] 21.6' Samsung 216BW G11 
PowerCaseMouseMouse Pad
700W OCZ XSTREAM Antec 900 G5 Beachside 
  hide details  
Reply
post #2 of 11
the colder the better, in terms of lifespan, this is why we put food in fridge. The voltage shouldn't matter. If you can cool a cpu to 30C on 1.0v or 2.5v the lifespan should be the same. AFAIK cpu life span is pretty much only dependent on the temp. And when we raise the voltage we increase the heat so we usually interpret raising voltage as reducing life span (same thing goes for increasing frequency).

so in your case the 24/7 LN2 cooling wins,
Edited by Captain Han - 5/25/08 at 2:49am
post #3 of 11
the voltage DOES matter. Even when super-chilled, an extreme voltage will shorten the lifespan. The circuits in a CPU aren't designed to withstand such high voltages. Yes, extreme cooling will offset this partly, but not completely by a long shot.

A watercooled system at 1.55V will probably last for quite a while, since the voltage isn't that excessive. However, 1.75V under extreme cooling will blow up pretty soon.
    
CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
KeyboardPowerCaseMouse
N/A Corsair HX520 Coolermaster Cavalier N/A 
Mouse Pad
N/A 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
KeyboardPowerCaseMouse
N/A Corsair HX520 Coolermaster Cavalier N/A 
Mouse Pad
N/A 
  hide details  
Reply
post #4 of 11
Thread Starter 
ah, very interesting to know. im trying to get 4.2 ghz, but i can only get 4.1 ghz under 1.6 volt. and i dontant to go 1.65 volt for another 0.1 ghz for bench reasons.
Xtasy's System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6700 @ 3.8 ghz // 1.46 vCore 24/7 Evga nForce 780i SLI w/ PencilMod BFG GTX260 4GB Dominator's @ 4/4/4/8-1T, 1066mhz. 
Hard DriveOSMonitorKeyboard
Seagate 300GB// Sata 3.0 [Raptor X on the way!] Window XP SP2 32Bit [64bit soon!] 21.6' Samsung 216BW G11 
PowerCaseMouseMouse Pad
700W OCZ XSTREAM Antec 900 G5 Beachside 
  hide details  
Reply
Xtasy's System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6700 @ 3.8 ghz // 1.46 vCore 24/7 Evga nForce 780i SLI w/ PencilMod BFG GTX260 4GB Dominator's @ 4/4/4/8-1T, 1066mhz. 
Hard DriveOSMonitorKeyboard
Seagate 300GB// Sata 3.0 [Raptor X on the way!] Window XP SP2 32Bit [64bit soon!] 21.6' Samsung 216BW G11 
PowerCaseMouseMouse Pad
700W OCZ XSTREAM Antec 900 G5 Beachside 
  hide details  
Reply
post #5 of 11
What's your Q6700's VID?
My Computer
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q6700 @ 3.6 @ 1.37v EVGA 790i Ultra SLI FTW - Digital EVGA 9800GTX + OCZ DDR3 8gb @ 1400mhz 
Hard DriveOSMonitorKeyboard
1TB + 600GB + 300GB + 500GB Jaunty 9.04 Dual 24" Hyundai/Samsung Mac Keyboard 
PowerCase
Corsair HX 620W ATX2.2 Modular Antec 1200 
  hide details  
Reply
My Computer
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q6700 @ 3.6 @ 1.37v EVGA 790i Ultra SLI FTW - Digital EVGA 9800GTX + OCZ DDR3 8gb @ 1400mhz 
Hard DriveOSMonitorKeyboard
1TB + 600GB + 300GB + 500GB Jaunty 9.04 Dual 24" Hyundai/Samsung Mac Keyboard 
PowerCase
Corsair HX 620W ATX2.2 Modular Antec 1200 
  hide details  
Reply
post #6 of 11
Thread Starter 
Quote:
Originally Posted by warnesey333 View Post
What's your Q6700's VID?

The vid on my q6700 is pretty high, i traded my q6600 @ 1.2175vid for a q6700 at 1.2875
Xtasy's System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6700 @ 3.8 ghz // 1.46 vCore 24/7 Evga nForce 780i SLI w/ PencilMod BFG GTX260 4GB Dominator's @ 4/4/4/8-1T, 1066mhz. 
Hard DriveOSMonitorKeyboard
Seagate 300GB// Sata 3.0 [Raptor X on the way!] Window XP SP2 32Bit [64bit soon!] 21.6' Samsung 216BW G11 
PowerCaseMouseMouse Pad
700W OCZ XSTREAM Antec 900 G5 Beachside 
  hide details  
Reply
Xtasy's System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6700 @ 3.8 ghz // 1.46 vCore 24/7 Evga nForce 780i SLI w/ PencilMod BFG GTX260 4GB Dominator's @ 4/4/4/8-1T, 1066mhz. 
Hard DriveOSMonitorKeyboard
Seagate 300GB// Sata 3.0 [Raptor X on the way!] Window XP SP2 32Bit [64bit soon!] 21.6' Samsung 216BW G11 
PowerCaseMouseMouse Pad
700W OCZ XSTREAM Antec 900 G5 Beachside 
  hide details  
Reply
post #7 of 11
hmm ok.
Running my Q6700 @ 3.6 @ 1.39Vcore and the VID is 1.25.
Been able to boot at 3.8, windows startup at 3.9 and 4 but BSOD's after that.

Might be pencil mod time.
My Computer
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q6700 @ 3.6 @ 1.37v EVGA 790i Ultra SLI FTW - Digital EVGA 9800GTX + OCZ DDR3 8gb @ 1400mhz 
Hard DriveOSMonitorKeyboard
1TB + 600GB + 300GB + 500GB Jaunty 9.04 Dual 24" Hyundai/Samsung Mac Keyboard 
PowerCase
Corsair HX 620W ATX2.2 Modular Antec 1200 
  hide details  
Reply
My Computer
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q6700 @ 3.6 @ 1.37v EVGA 790i Ultra SLI FTW - Digital EVGA 9800GTX + OCZ DDR3 8gb @ 1400mhz 
Hard DriveOSMonitorKeyboard
1TB + 600GB + 300GB + 500GB Jaunty 9.04 Dual 24" Hyundai/Samsung Mac Keyboard 
PowerCase
Corsair HX 620W ATX2.2 Modular Antec 1200 
  hide details  
Reply
post #8 of 11
i forgot to mention, even though you can run your system at high voltage doesn't mean it'll be stable. The after effect of increasing voltage is greater heat dissipation (volt x amp= watt) and that's what damages the cpu not increasing voltage. You counter the heat by using whatever cooling method you use to not burn the transisters.

but once you reach an OC limit the transistors themselves are just not switching fast enough to provide a clear digital signal therefore no matter how cold the chip is that's why it'll never overclock that high.
post #9 of 11
Don't forget about electromigration. This can occur even when temperatures are within reason. For those who remember the Sudden Northwood Death Syndrome, electromigration was the likely cause of this. P4 Northwood chips were notorious for just dying when too high a voltage was applied (~1.6V I believe), even when temperatures were within Intel's spec. Even though there is a relation between temperature and electromigration, there is an even stronger relationship between voltage and electromigration. Thus, EVEN whem temperatures seem acceptable (or even excellent), a CPU can die because of excessive voltages.
    
CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
KeyboardPowerCaseMouse
N/A Corsair HX520 Coolermaster Cavalier N/A 
Mouse Pad
N/A 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
KeyboardPowerCaseMouse
N/A Corsair HX520 Coolermaster Cavalier N/A 
Mouse Pad
N/A 
  hide details  
Reply
post #10 of 11
Thread Starter 
Quote:
Originally Posted by Chozart View Post
Don't forget about electromigration. This can occur even when temperatures are within reason. For those who remember the Sudden Northwood Death Syndrome, electromigration was the likely cause of this. P4 Northwood chips were notorious for just dying when too high a voltage was applied (~1.6V I believe), even when temperatures were within Intel's spec. Even though there is a relation between temperature and electromigration, there is an even stronger relationship between voltage and electromigration. Thus, EVEN whem temperatures seem acceptable (or even excellent), a CPU can die because of excessive voltages.

ah thanks, feel happy that i started this thread, learn a lot (: even though its not hands on.. and i wouldnt want it to be, i'm still learning
Xtasy's System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6700 @ 3.8 ghz // 1.46 vCore 24/7 Evga nForce 780i SLI w/ PencilMod BFG GTX260 4GB Dominator's @ 4/4/4/8-1T, 1066mhz. 
Hard DriveOSMonitorKeyboard
Seagate 300GB// Sata 3.0 [Raptor X on the way!] Window XP SP2 32Bit [64bit soon!] 21.6' Samsung 216BW G11 
PowerCaseMouseMouse Pad
700W OCZ XSTREAM Antec 900 G5 Beachside 
  hide details  
Reply
Xtasy's System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6700 @ 3.8 ghz // 1.46 vCore 24/7 Evga nForce 780i SLI w/ PencilMod BFG GTX260 4GB Dominator's @ 4/4/4/8-1T, 1066mhz. 
Hard DriveOSMonitorKeyboard
Seagate 300GB// Sata 3.0 [Raptor X on the way!] Window XP SP2 32Bit [64bit soon!] 21.6' Samsung 216BW G11 
PowerCaseMouseMouse Pad
700W OCZ XSTREAM Antec 900 G5 Beachside 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › Confusion between Cooling and Voltage..