How odd it may seem (everyone else complaining about Vista eating up too much memory) I'm puzzled by the fact that my Vista x64 only uses a maximum of 3 Gb RAM on a desktop, where 6 Gb is available.

Any suggestions on how I can improve my PC performance by forcing Vista (and a 64-bit video editing application) to use all available memory?

Thanks for replying so quickly.

I've read the memtest guide and would appreciate not going that far at first. In the meantime I have made a screenshot of the task manager's memory usage and attached it here.

Does'nt Vista have a test for the memory where you are not requested to open the case?

Richard,
Thank you. I'll follow your advice, investigate the RAM thoroughly and then get back. Probably not until tomorrow (I'm on GMT+1)

Thanks,

Bent

Hi again,

Have used MEMTEST86+ v/4.20 with the good(!) outcome that my 6Gb RAM is OK. Not a single flaw. I have not opened the case, however. Only tested all 6Gb in situ with MEMTEST booted from CD. Think I'll wait with the single memory bank testing until other options have been examinated.

I'm still thinking the hardware itself is OK and that I (we) maybe should be looking for a logical flaw somewhere. It seems to me, that in spite of Vista in Task manager reports all 6Gb as being present, and in spite of my Vista being a 64 bit version, it behaves like it's operating in 32 bit mode only.

Is there any place I can see or change the way Vista controls 32 bit or 64 bit mode?

Looking fwd to your ideas.

Bent