So i bought a pair of 2gb memory off newegg. the memory is manufactured by Transcend. Anyways i have a total of 4 gb (2 gb sticks) and i installed it and now the mac pro dosnt recognize it. i go About my Mac, and it still shows the STOCK 2gb memory. i go into system profiler under memory and it shows the banks where i inserted my new ram sticks as empty. i wanna know why? when i bought it from new egg (and on the box) it says it is compadible with my Mac Pro, but it dosnt recognize it. I tried putting the ram into different slots but that dosnt help. when i take out the Transcend memory sticks they are somewhat warm as if it was being used or something. my question is why dosnt eaither stick work? i figure maybe 1 could just be a dud, and sureley the other stick would work... but neither work. what should i do? maybe i did something wrong? the sticks are firmly in the ram slot, and the sides are holding the ram in place... any suggestions? ideas?