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Gigabyte GA-MA785G-US2H - Overvolting Integrated HD4200

post #1 of 7
Thread Starter 
I am trying to determine what voltages I need to adjust to increase the speed of this iGPU and also determine what the maximum voltage you would reccommend. The box claims an 1100MHz oc on the chip lol. I am able to run it at 800-850MHz right now without changing anything. The PC is in my systems in my profile and is named "Patsy."

Here is my actual board, a Rev. 1.1

Here are the voltage settings I can change:

DDR2 Voltage Control
NorthBridge Volt Control
SouthBridge Volt Control
CPU NB VID Control
CPU Voltage Control

Do I only need to ONLY overvolt the SB to increase my GPU clock further? I took the heatsinks off the NB and SB to see what state they were in and scraped the almost burnt adheasive off of them and applied MX-2 TIM (did not have anything else, should I replace this?) and mounted a pair of old P2 fans to the the heatsinks. (Pack Rat) I modded my case and put 120M Scythe Slipstreams in the side pointing at the CPU and another just under it that blows at the NB/SB.

I did test a .1v increase (board allows up to +.3v) to the SB and it did let me get up to 900MHz, but I just want to double check.

Also, what does CPU NB VID Control do? I was curious since it says VID. Thanks!


Lastly, the computer is used for Facebook games and crap for my girlfriend and it does fine, however, I installed The Sims 3 on it and tried to run full settings. It was very close to pulling it off very well, but there is some jittering and I feel the additional clock speed may resolve this along with increasing my DDR2 speed without turning down the settings.

I want to try this out first. I may end up buying another card or trading etc. etc.
 
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post #2 of 7
just get a better gpu

a 4550 is about twice as good as the onboard 4200
i got one for $25/5ar from newegg (currently in my htpc rig)
post #3 of 7
Thread Starter 
It is so close to perfectly handling The Sims 3 at all it's highest settings. Can you confirm whether the SB voltage is the only voltage I need to raise to oc it or not?

I apreciate the push for a new card, but in her case, she does not need one. I just need a little more power out of this iGPU.
 
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post #4 of 7
It's the northbridge. southbridge handles the USB, IDE/SATA connections.
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post #5 of 7
Thread Starter 
Thank you! I figured that out about 15 minutes ago. doh.gif I believe I have this handled now. I am running furmark on a 1000MHz clock and my NB is in the high 40's. My FPS jumped from 1 to 3 eek.gif

I am a little unsure of the CPU NB VID Control though. Any idea on what that might be? HT Link?
Edited by BWG - 5/19/11 at 5:55am
 
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post #6 of 7
Quote:
Originally Posted by BWG;13560588 
Thank you! I figured that out about 15 minutes ago. doh.gif I believe I have this handled now. I am running furmark on a 1000MHz clock and my NB is in the high 40's. My FPS jumped from 1 to 3 eek.gif

I am a little unsure of the CPU NB VID Control though. Any idea on what that might be?

I believe CPU/NB VID is the IMC (integrated memory controller). HT Link should be around 2000Mhz, and you shouldn't have to increase the voltage more than .1 (not much performance increase for overclocking it). Wow, 3FPS=super long benchmark test. I would probably run an older version of furmark.
Edited by charlie310 - 5/19/11 at 6:09am
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post #7 of 7
Thread Starter 
Yeah, it is still running. Pretty funny stuff! Thanks again!
 
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