Very nice upgrades, I'm glad you chose the nVidia, as most games are going to open GL, also, the ati 300 has that hypermemory, which means that it only has shared memory, so it might go up to 128mb but it wont stay their all the time. You will be able to play any game out right now, on medium/high settings... for sure, high for bf2, hl2, & all the sims....