Well I've got myself BF3 PE but it runs quite laggy even with lowest settings. Seems like I need a graphics card after all I will have to get one in the next weeks, you folks have to wait for me :S
look at a gtx 550 Ti. this is more than ok for playing bf3 and it´s really cheap at the moment in ebay. if you will play bf4 in future too than go to a gtx 660.