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Question regarding onboard video overclocking safety...

post #1 of 3
Thread Starter 
I am somewhat new to overclocking and have a question about safety, notably with regard to the overclocking of my system's onboard video.

Here is my system info:

I am currently running an Athlon II X2 245 Regor w/stock cooling on a Gigabyte GA-MA785GM-US2H mainboard with two 2GB sticks of G.Skill DDR2 1066 (unganged), powered by a PC Power & Cooling Silencer 370 and housed in an Antec 200. I am using the integrated video (Radeon HD 4200) and running a single 7200rpm hard drive.

The CPU is stable at 3.7 Ghz, with temps of ~25°C at idle and ~50°C under full load. The main clock is set at 255 Mhz, with all of the multipliers left at default settings ("Auto"), with the exception of the memory clock multiplier, which has been lowered to "x 3.33", giving the RAM an effective clockspeed of 850 Mhz. The voltages have not been touched.

Now, please correct me if I am mistaken, but my understanding is that overclocking by increasing the system clockspeed and/or multipliers is generally safe (as far as physically damaging the chips), so long as the voltages are not raised above stock specs and temps are kept properly controlled. It is also my understanding that increasing clockspeed does not inherently increase temps if the voltage remains untouched, and that AMD's Cool & Quiet reduces temps because it reduces the voltage when the CPU (clock multiplier) is throttled down. Again, please correct me if my notions are incorrect.

My real question is in regard to overclocking the onboard video of my system. The default video core clockspeed is 500 Mhz, but can be manually adjusted to as high as 1 Ghz. I presently have the video core running at 900Mhz (yielding a video performance increase of ~60%), with no apparent ill-effects. I am somewhat concerned, however, about whether or not this 80% increase in clockspeed may adversely affect the health of the 785G northbridge chip (into which the graphics are integrated).

Again, it is my understanding that changing only the clockspeed of the core w/o increasing voltages should be relatively safe. However, the CPU is only being pushed ~30% higher than normal, and it has its own cooling fan, while the video core is up to 80% higher than normal, with only a heatsink to cool the northbridge chip. Is doing this still fairly safe or am I risking permanent damage to my chip/board?

And, yes, for the record, I do realize that I can drastically improve video performance by adding even a very cheap, low-end PCI-E video card.
post #2 of 3
If you are overclocing you should disable cool and quiet. As far as temps go, if a chip is working faster its gonna heat up more. Integrated video cards are very weird. Mine also goes up like hell near 900mhz and it stills work. I have no idea why though. Bear in mind that a 30% overclock is rather good. Now the integrated gpu. As long as you keep the nb cool and it doesnt artifact I see nothing wrong with it. But if you disable that gpu and add a pci-e card you may achieve bigger overclocks since the nb will be free to deal with other things. But no, you will not damage your board this way as long as the temps are low and the voltage is left untouched.
1155 POWER
(16 items)
 
AMD Heater
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CPUMotherboardGraphicsGraphics
i5 2500k 4,6Ghz Asus Maximus IV Extreme Palit GTX 560 Ti Sonic Gigabyte GTX 560 Ti Overclocked 
RAMHard DriveHard DriveCooling
8GB G.Skill Sniper 1886MHz Seagate 500GB and Samsung 500GB Samsung 840 SSD Corsair H50 
OSMonitorKeyboardPower
Windows 7 Ultimate 64-bit BenQ XL2411Z Steelseries Merc Stealth Nox Apex 800w 
CaseMouseMouse Pad
Antec Lanboy Air Logitech G400s Steelseries Qck Mass 
CPUMotherboardGraphicsRAM
AMD 955 BE Asus Crosshair Formula II nVidia GTX 260 Core 216 55nm Kingston DDR2 4GB 800Mhz 
Hard DriveOptical DriveCoolingOS
Western Digital 500GB Some cheap thing (at least it's black) Modded AMD Stock Cooler Windows 7 Home Premium 32-bit 
MonitorPowerCaseMouse
Some Samsung. Corsair CX600 NZXT Tempest A4Tech X7 
Mouse Pad
Bundled Black Ops Mousepad lol 
CPUMotherboardGraphicsRAM
Intel i5-4210H MSI MS-16GF GTX 850M 8GB DDR3 
Hard DriveOptical DriveOSKeyboard
WDC WD5000 HL-DT-ST DVDRAN GTA0N Windows 8.1 by Steelseries 
Audio
Dynaudio 
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1155 POWER
(16 items)
 
AMD Heater
(13 items)
 
 
CPUMotherboardGraphicsGraphics
i5 2500k 4,6Ghz Asus Maximus IV Extreme Palit GTX 560 Ti Sonic Gigabyte GTX 560 Ti Overclocked 
RAMHard DriveHard DriveCooling
8GB G.Skill Sniper 1886MHz Seagate 500GB and Samsung 500GB Samsung 840 SSD Corsair H50 
OSMonitorKeyboardPower
Windows 7 Ultimate 64-bit BenQ XL2411Z Steelseries Merc Stealth Nox Apex 800w 
CaseMouseMouse Pad
Antec Lanboy Air Logitech G400s Steelseries Qck Mass 
CPUMotherboardGraphicsRAM
AMD 955 BE Asus Crosshair Formula II nVidia GTX 260 Core 216 55nm Kingston DDR2 4GB 800Mhz 
Hard DriveOptical DriveCoolingOS
Western Digital 500GB Some cheap thing (at least it's black) Modded AMD Stock Cooler Windows 7 Home Premium 32-bit 
MonitorPowerCaseMouse
Some Samsung. Corsair CX600 NZXT Tempest A4Tech X7 
Mouse Pad
Bundled Black Ops Mousepad lol 
CPUMotherboardGraphicsRAM
Intel i5-4210H MSI MS-16GF GTX 850M 8GB DDR3 
Hard DriveOptical DriveOSKeyboard
WDC WD5000 HL-DT-ST DVDRAN GTA0N Windows 8.1 by Steelseries 
Audio
Dynaudio 
  hide details  
Reply
post #3 of 3
Thread Starter 
From what I have read, there appear to be mixed opinions regarding whether or not Cool & Quiet should be enabled when one is overclocking. What is the reasoning behind your recommendation to disable the feature?
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