When I had the problem with the ASUS card I was using 285.62 (The most recent ones for that card). In the NVIDIA I used the 285.62 which is the most recent driver for the 560ti as well. Now I tried to use the driver from the CD that nvidia provided and it would not let me play BF3.
Update: I am installing the battlefield 3 beta drivers which I used for the beta and didnt have any of these issues.
Gah, would everyone stop being all insta "replace PSU" just because of the brand name. Yes, the product a company makes speaks for the company. But the lot of you guys just say get a different one because they have one that isn't "recommended".
I'm not saying the PSU is or is not the problem, but definitely research the free solutions first before throwing money away. If his PSU is working fine then there is no need to replace it. Just because of the brand name doesn't mean that it's a time bomb waiting to destroy his computer.
specs on psus matter less than name...
... most high power PSU's have multiple rails
specs on psus matter less than name, most companies build unreliable psus that will fail or blow up taking other parts with it much more often. the brands corsair/antec/xfx/seasonic/silverstone/pc power & cooling all build quality psus, there are other brands with good ones, some brands will have a line or 2 that are of quality, such as ocz and coolermaster being decent companies, but overall the ones listed are the most trusted and best quality also offering good value too.