Overclock.net › Forums › Cooling › Air Cooling › CPU temperature massive spike under load
New Posts  All Forums:Forum Nav:

CPU temperature massive spike under load - Page 2

post #11 of 12
@wind thanks man I learned something today.

he's right on this but if your so concerned then yea reset the cpu.
    
CPUMotherboardGraphicsRAM
Ryzen 1600 MSI b350 tomahawk MSI Gaming X 1070 8GB G.SKILL Flare X 16Gb (2x8) 
Hard DriveHard DriveOptical DriveCooling
Barracuda 1TB Sata 6 OCZ Vertex 3 120Gb Samsung Model SH-222AB Nzxt Kraken X61 
OSMonitorKeyboardPower
Windows 10 Pro Asus VG248QE Logitech G710+ Antec TruePower New Blue 750W 
CaseMouseMouse PadAudio
Cooler Master Master case pro 5 G502 Proteus core roccat taito Logitech G430 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Ryzen 1600 MSI b350 tomahawk MSI Gaming X 1070 8GB G.SKILL Flare X 16Gb (2x8) 
Hard DriveHard DriveOptical DriveCooling
Barracuda 1TB Sata 6 OCZ Vertex 3 120Gb Samsung Model SH-222AB Nzxt Kraken X61 
OSMonitorKeyboardPower
Windows 10 Pro Asus VG248QE Logitech G710+ Antec TruePower New Blue 750W 
CaseMouseMouse PadAudio
Cooler Master Master case pro 5 G502 Proteus core roccat taito Logitech G430 
  hide details  
Reply
post #12 of 12
Thread Starter 
Quote:
Originally Posted by windfire View Post
You should not be worried. The spike is due to neither an improper seating of your CPU nor using too much TIM. Rather, the sharp rise represents the 'reaction' time of the cooling system, IMHO.

A CPU is an electronic device that can go to full load 'instantaneously' when it is stressed by a software. A typical cooling system simply cannot respond fast enough to such a high rate of thermal output.
A heatsink-fan system dissipates the heat from the cores -->IHS -->thermal paste-->heatsink base-->heatpipes-->fins-->air/fan. This thermal path takes a few seconds.

See the graph below. It shows a cooling system based on a temperature-controlled water chiller cooling an i7:-
1st stage: There is sharp spike of about 17C within a few seconds when the CPU is full loaded. Rate of thermal output from CPU just overwhelms the rate of dissipation of the cooling system.

2nd stage: Then, for the next minute of full load, temp rises about 8C. Temp continues to rise because there is still a thermal inequilibrium But it is not rising as fast as before because the cooling system has passed the initial reaction time and is kicking in to dissipate the heat at a faster rate. Rate of thermal output is constant from the CPU. The rate of dissipation is picking up. Ultimately, given enough time, the curve would level off when the rate of thermal output equals the rate of dissipation. But, of course, this is not shown in the graph.

3rd stage: When the software stops full-loading the CPU at t = 2 minute mark, a sharp drop of about 17C occurs. This happens within a few seconds as well. Basically, t1 = t2 = reaction time of the cooling system.

4th stage: Within the next minute, it drops about 7C and fairly much returns to the prior temperature of 42C.

I hope this gives you some peace so that you can concentrate your mind on your school work.
Thanks! That did put my mind at ease at least until I finish my exams. I was planning on doing a rebuild after my exams, so I can reseat the CPU then as well.
Icarus
(19 items)
 
   
CPUMotherboardRAMRAM
i5 3570k Asrock H77-m Pro4 Corsair Vengeance Patriot 
RAMHard DriveHard DriveHard Drive
Kingston HyperX Blu Western Digital Red 3x 3TB Intel 310 160GB Western Digital Green 2x 2TB 
OSMonitorPowerCase
Server 2008 R2 Sony KDL55HX750 Corsair Builder Series 400W Silverstone Grandia GD06B 
  hide details  
Reply
Icarus
(19 items)
 
   
CPUMotherboardRAMRAM
i5 3570k Asrock H77-m Pro4 Corsair Vengeance Patriot 
RAMHard DriveHard DriveHard Drive
Kingston HyperX Blu Western Digital Red 3x 3TB Intel 310 160GB Western Digital Green 2x 2TB 
OSMonitorPowerCase
Server 2008 R2 Sony KDL55HX750 Corsair Builder Series 400W Silverstone Grandia GD06B 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Air Cooling
Overclock.net › Forums › Cooling › Air Cooling › CPU temperature massive spike under load