This sounds to me like a heat problem.  On my Radeon 9800, the fan
died.  The computer would run at "idle" with no problem, but would
lock up when I tried to do anything taxing on the video card.
Keep this in mind when trying to troubleshoot your problem.

Tony Mayer


>I need some suggestions on testing RAM. My computer sometimes locks up where
>there is no response and even the mouse does not respond. The only solution
>is to press the reset button. Details of the machine:
>
>Intel D845PEBT2 motherboard
>2.4G P4 CPU with no overclocking
>1 stick Samsung 512M RAM
>1 stick of generic 1G RAM
>Running XP Pro SP2 with all latest patches. This is a new clean install less
>than a month old.
>
>I am suspecting that RAM may be the problem. RAM testing software, however,
>shows no problems. The lockup happens almost on a daily basis, and often
>occurs when accessing a web page using Firefox or IE. Latest lockup happened
>with some video authoring software, however. I suspect that I will need to
>replace the RAM to see if it is the problem. My post is to request
>suggestions of other paths I can take. Thank you.
>
>
>Peter
>
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