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Incorrect RAM reported on BIOS

Recently RAM upgrade on Acer Veriton 7700GX (32bit machine, but using Windows 7 RC1), however motherboard is only able to see 3GB instead of 4GB. I have tested each ram on the different slots and no issue. The Acer esetting software is reporting slot 1+3 512MB, slot 2+4 1GB. I have also upgraded BIOS to R01-E0. I read on Internet about memory mapping but not able to access this function even with CTRL-F1. The only hot key I can use is ALT-F4, but none of the function relates to memory mapping. I have also unplugged other hardware components and tried to reduce power by unplugging unused devices. I would apperciate any advise or suggestions. Thanks.

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  • dragonjai May 24, 2009

    The motherboard is Acer F90M using Phoneix Technologies AwardBios.



    http://www.fixya.com/support/p369069-ace...



    I

  • dragonjai May 26, 2009

    I have discovered my CPU is Intel P4 630 3.0Ghz, it support 64bit. I have also reinstalled Windows 7 64bit. The ram is still reporting 2.8 (3GB) same as BIOS. I am not able to see any memory remap functions in BIOS.



    I read that you can try forcing /PAE during bootup, but not sure this will make any difference.



    My RAM modules are 2 x 1GB (266hz) and 2 x 1GB (333hz) DDR2. I read that different speed can mess up the BIOS so it won't report 4GB. Is this true?



    CPU-Z is reporting 4GB with the speed above, it has downgraded to use 266hz.

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  • 15 Answers

4GB RAM requires a 64 bit compatible processor AND Operating System to be able to access
addresses in memory that exceed the 32 bit assress space.

I'm not familiar with the motherboard that you are using but simply expanding RAM isn't enough if your
system isn't 64 bit compliant. Assuming it is, then ensure that you are using a 64 bit version of Windows 7 opposed to a 32 bit release candidate.

Posted on May 23, 2009

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