Im trying to see if I can get my 500RX working with 8mb ram, because at this point it is only stable with 4mb. Im thinking of buying a 2nd 500RX and swapping the chips (not the memory chips) to see if I can get it working. It might be a power issue. so if anyone is selling one or would sell/borrow/loan/sale&return I would be happy to return it after buying it because there is nobody in my area with the diagnostic skills to help me.