Is it possible to lower the frequency of IGP (not CPU)

Is it possible to lower the frequency of IGP (not CPU). If yes which software should I use?

 

By IGP, you mean integrated graphics processors like that of Intel's? Why would you have to do that? They are tame enough, and I can't remember there being any software that could tweak the core frequencies of IGP's..though if you mean integrated GPU's of nVidia like the 9100M G, then you could try RivaTuner or EVGA precision.

 

The IGPs are embedded into a chipset IC, cannot be altered without slowing down the entire system.

 

Yes, it is but not Intel. My chipset is SiS. After some research I find out this terrible SiS M672 is desktop chipset SiS 672 rebranded as a mobile one by adding a prefix "M" (really good marketing strategy, huh?) The power consumption of it's graphic core (mirage 3+) is multiples of the CPU. That's why I want to reduce it's frequency.

 

I wouldn't mind halving the performance if I could get double battery life time.

 

Are you SURE the chipset is the fault for low battery life? Because SiS chipsets are slow yes, but a bonus of that is usually low power consumption. And no you will never get 50% power reduction for reducing one component by 50%. Basically that would imply that single component is taking up nearly 100% of the power consumption.

 

Intel provides a power management control within the graphics driver.

SiS and S3 have been swallowed by VIA. My suggestion is that you try a new VIA driver and see if it happens to support the older hardware. This is the driver for the VIA Chrome9 HC3 IGP in the Samsung NC20. There's a small chance that it may work. However, I'm not sure what power management control is provided.

John

 

Thanks for the link. I get a device not compatible error message during installation.

I didn't heard that SiS had been intergrated with VIA. I only know that SiS is going to discontinue producing chipsets for Intel desktop/laptop platform as they can bearly make profit out of it. SiS sold their chipsets for low price and therefore there are tons of ultra-cheap fullsize notebook with SiS M671 and M672 notebooks on the market.

Yes it must be a chipsets problem. My friend has an Acer with the same specification as me except the chipsets. His is a Intel GL960 and mine only has 60% battery life as his, although mine is newer and a bit higher capacity then his. I searched in google and get the same results.

If SiS ended their business earlier than I wouldn't be able to buy their notorious product. I am so regret! Now I want to peel that chip out with a knife!

 

Could be merely the difference in power management settings. In almost all of the cases the mobile branded ones do use lower power.

 

You meant the power management in control panel? I've already set it as minimum. But no difference noticed.

 

I know that you can adjust the frequency of the IGP in the bios in most after market motherboards. Since the laptop will likely have the Bios locked down, I doubt you can change it through bios. You have other options such as decreasing your PCI-E bus through software such as SetFSB. That way, it'll slow down the graphic core clock as well as reducing performance of anything connected to PCI-E bus.. so you have to watch out.

I wish I can lower the clock speed of my Intel Gma 950 IGP the northbridge consume over 50% of all of the power used in my netbook.

 

Lowering the clocks on a GPU won't affect the power consumption. You need to lower voltage, but this is not easily doable compared to a CPU. It requires voiding warranty, and either soft modding the BIOS or hard modding the physical GPU itself. I'm not exactly sure how notebooks and hard modding work, but it is doable with desktop cards.

 

Lowering the clock speed will infact lower the power ussage, though not as much as lowering the voltage.

 

Thanks for your suggestion. The BIOS has nothing manageable except date/time and boot order. I will try SetFSB.