hardware and the BP=0 tweak

I am considering the BP=0 tweak to get my frame rates up in FSX. I currently have a Lynnfield Intel (LGA 1156) i5 overclocked to 4.0Ghz. My understanding that with the BP=0 tweak, you must have a graphics card that has at least 1Gb of memory and is fast enough to handle all of the information that they CPU can send to it or that it will cause crashes. Would a GeForce GTX 570 (1280MB of memory) be fast enough to handle the data coming from my i5? I currently have a Nvidia 275 with less than 1Gb of memory. Any recommendations would be greatly appreciated. Feel free to educate me this topic. Maybe it will be of help to someone else, too. Thanks in advance!RH