Strange stripes in Deferred Shading(or MRT),only appears in GTX650Ti(maybe)

Hi there,I’m a indiegamer,I’m using deferred pipeline.
Everything is OK on my GTX650Ti,but…
I found,there many stripes on my screen,they are only appears in normal render target,only in MRT.I did some test with same program on my other cards(likes ATI…),the stripes disappeared.I can’t figure it out,I need some help here.
About my question,I have post on Ogre’s forum,and this is not a bug of Ogre.I’v tested FxComposer and RenderMonkey,only my GTX650Ti have this question,and my driver is July.2013(same problem in older version)
You can see my screenshot here:http://www.ogre3d.org/forums/viewtopic.php?f=1&t=78257&p=493991#p493991