Monitor "Blinking" on and off during 6.1 install on Ultra 60

[Tom]

I saw a posting on the internet regarding a Sun Ultra 60.

I have an Ultra 60 that need a new video card. Is is possible to use a 
standard PCI video card
to run in the Sun hardware? If so is a model that you recommend?

I though after reading the documentation they had a HPA bus and not PCI. 
I would appreciate
the help,.

Thanks
Tom Martin