text: dimension 4600 (dell) ram problems? i am having a problem with my dell 4600. it is xp home edition with sp2. it came with 256mb of ram. i am trying to put 2 x 512mb= 1 gb sticks of ddr ram in the computer. when i put them in, i am getting an error. the error reads: alert! os install mode enabled. amout of avaiable memory limited to 256mb. i am not sure what is going on here. i have tried them one at a time. there is just no luck. if you have an suggestions, please submit. if you have any websites, i will gladly visit them. (if they help me) when your computer boots press the 'del'. button on the num pad then you will enter the bios in there browse around *i dont know what version u have so i cant help with the menus* and dont change anything unless it directly relates to your ram