Hi, i have a imac 2.00ghz intel core 2 duo and i bought some extra ram for it(1x 1gb 1x 2gb) at macsales.com problem is that they wont work when there both in my mac. i can put one in doesnt matter which slot and my mac will just boot normally. but when i put them both in it starts and the screen just stays black and the little light is on. ive tried all the combinations but i cant find a problem. I dont think the slots are broken cause they both work eventhough i only have one ramstick in the mac. and both ram sticks work aslong i use them seperately.