5 Replies Latest reply: Apr 21, 2008 9:13 PM by Mac Medic (be@MacOSG.com)
BarnetteBW Level 1 Level 1 (20 points)
I have a mid-2007 model MacBook--the one with 64 MB of shared VRAM. I know in PCs it is possible to increase the amount of dedicated VRAM through BIOS. Is it possible to do this on my MacBook in any way? I'm going to have 4 GB of RAM in a few days (though the MacBook will only read 3 GB of it), and I'd like to use some of this for VRAM. Thanks for any suggestions...

Black MacBook, Mac OS X (10.5.2), 2 GB RAM, 2.16 GHz Intel Core 2 Duo; 8 GB iPhone
  • Kappy Level 10 Level 10 (249,770 points)
    As far as I'm aware there is no such option for the Mac. Intel Macs do not have a BIOS such as PCs, rather they use EFI (Extensible Firmware Interface.)
  • Jonathan Kurtzman Level 4 Level 4 (1,100 points)
    You don't understand how the graphics processor works. Read about it. The processor uses a minimum amount of vram and then draws extra ram as necessary from the total amount available. Up to something like 392MB. You don't control it; it's done by the system and the programs and the amount available.
  • Mac Medic (be@MacOSG.com) Level 6 Level 6 (17,290 points)
    Jonathan and Kappy are right. There is nothing you can do to increase the VRAM on a MacBook, except upgrade to a MacBook Pro. Then you will have some serious graphics performance.

    -Bmer
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  • art_brana Level 1 Level 1 (95 points)
    theres no point on putting 4 gigs of ram when your computer can only read 3
  • Mac Medic (be@MacOSG.com) Level 6 Level 6 (17,290 points)
    theres no point on putting 4 gigs of ram when your computer can only read 3.


    If you install 4GB, tests show 3.3 GB is the actual maximum. To test it, I installed 4G in my 2.1Ghz MBP and noticed a slight difference in performance from the previous 3G I had insstalled. I don't page out as much as I did before.

    -Bmer
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