[H-GEN] 4->8gb ram instability?

[Ben Martin]

Hi,
  On the odd chance that somebody has ventured and been bitten, I have
an AMD X4 machine which runs well with 4gb of RAM but on upgrade to 8gb
(4 sticks total) random crashes ensue, from yum through to bash. This is
a Fedora 13 64bit distro machine. The thing runs solid for 3+ passes of
memtest86 so I'm thinking it can address it's RAM fine.

  I'm wondering if there are some kernel parameters to tell it to behave
or perhaps this mobo/bois just doesn't want to work with 8gb :/ Any
thoughts or hints welcome.

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