Thread: How do you make T400 integrated graphics use less memory?

af22 wrote: I have just bought a new T400 with the ATI discrete graphics. My laptop is configured with 4GB ram and loaded with Windows 7 32bit enterprise edition. I'm expecting my usable memory to be close to 3.3-3.5 gigs of memory, but instead found that i only have 2.5 gigs available due to intel 4500 utilizing 1 gig of memory. You are using a 32 bit operating system and it is only able to effectively use ~3GB of memory (this has been...

turning off switchable graphics in the bios is the only way to "see" more than 3GB AFAIK. My Vista 32 with switchable turned off shows just over 3GB of available memory, which according to MS is about all we can expect due to mapping by various components (including the ATI card's own memory) The "cause" section of the following MS article explains quite nicely why: http://support.microsoft.com/kb/929605

Hello, I have just bought a new T400 with the ATI discrete graphics. My laptop is configured with 4GB ram and loaded with Windows 7 32bit enterprise edition. I'm expecting my usable memory to be close to 3.3-3.5 gigs of memory, but instead found that i only have 2.5 gigs available due to the intel 4500 utilizing 1 gig of memory. How can i restrict the amount of memory the intel graphics can use? I would like to set it to 256-512 instead...