Question of memory about the implementation of win 7 64 bit

I have an Acer 8920 G Intel [email protected] running win 7 64 bit.  under Vista, I had a limit of 4 GB, with Win 7, I can increase my memory to say 8 or 12 GB?  I think the limit is 16 GB right?

I've updated a lot of systems.  I suspect your new Vista machine, was a 32-bit version.  32-bit systems can not 'see' more of about 3.25 G of memory, no matter how you equip with.

64-bit systems can theoretically see a lot more.  The limitation will be with the chipset and BIOS of the particular model.  Yours has 2 memory slots.

According to my experience, two systems of 4G equipped that are identical in all directions but is 32 and 64 other results in 15% performance improvement.  In addition, Win7 is about 10% faster than Vista SP2.

Problem is the manufacturer produces a model, provides updates of the software of the chipset and BIOS that allow these improvements, but never reissues sheets.

I found many systems including the specs say 2 pcs 2G each are at max.  In many of these systems, I discovered that they handled 2 PC 4 G each without problem.  Make sure that your BIOS is the last before trying this.

It is essential that the 2 PC's are matched.  If they do not match, the memory does not work in mode Dual DDR2 is capable of.   Also, see if you can find the specifications for the memory CASE latency rate.  Some systems will not accept a higher speed and strips of larger memory than if they are provided with the right latency memory.

Your probably provided with 2 PC 2 G DDR2 667.  I would not be surprised if DDR2 800 is not working and thus produce improved performance.  I found that this was the case in many systems.  You will find some DDR2 800 and 667 cost the same.  If the system will not work at 800, your 800 memory works well, but speed 667.

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