tarekeldeeb,

Please tell me your machine environment. Which type of GeForce do you use?
Which type of AMD64 do you use? How much memory does your machine have?

Could you confirm the driver of GeForce is installed? If the driver is installed, you find the nVIDIA tread mark.

I guess AMD64 will not cause problem, because our SUN Ultra 20 (AMD Opteron 152) does work well.

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suzaki