Hi Jim,

Thanks for your reply and excellent explanation.

I have Nvidia Geforce GT 210 graphics card installed.
Can you give settings of bios for disable onboard graphics.
I have Phoenix Award Bios latest (It shows updated in 9th June, 2013 don't know exactly ). I disabled onboard graphics (may not disabled perfectly) but you said 0.25 GB is reserve for integrated graphics, then how can i disable it?

Krunal Pithwa

Jim Hillier said

You may not be able to disable onboard graphics. Phoenix Award BIOS has many different versions, and different motherboards will also have different chip sets installed. From my experience, there are far more BIOSs that do not have this option than those that do.
What are you worried about anyway? 2.75GB RAM should be more than adequate to run Windows 7 okay, especially with a dedicated graphic card installed as well. Is your machine running slow and unresponsive?
Jim

No Jim... I want to use completely 3 GB Ram. But there is no problem with my PC, it runs fast and smooth.
Phoenix Award Bios Version is 6.00 pg. Motherboard is 945.

Thanks for your support and time..

Jim Hillier said

Okay, but your mobo model "945" doesn't make much sense to me. Sounds like it might be a Gigabyte mobo but there is a range of '945' models, we would need the exact model number.
Try this:
Boot into BIOS and look for "Advanced Chipset Features".
You should see a setting "Video RAM Cacheable" under "Advanced Chipset Features", set that to "Disabled".
Then exit BIOS saving new settings (usually F10).
Here is a full PDF guidelines to your BIOS: http://www.answersthatwork.com/Download_Area/ATW_Library/Hardware_Maint/HW___6-Award_6.00PG_BIOS_setup_guidelines.pdf
Bear in mind that settings might be not all be the same for all chipsets.
Cheers... Jim

Thanks Jim for your great support.
I don't know the exact model number but I tell you latter after looking into my motherboard.

Thanks you

Krunal