vladthebad Posted April 28, 2008 Share Posted April 28, 2008 I've got a EVGA 8400 GS 256. Appears to be same circuit board used for a 8400 GS 512. (Or maybe 8600) Device is ID 0404. Tryed several NVCAP's with no good results. It just doesn't want to do dual monitors it seems. Bios comes out on the VGA port. Then video switches to the DVI port and either shows a blue screen and locks. Or shows the desktop of the 2nd monitor in extend mode.... BUT the top 1/3rd or so of the screen keeps going black. The mouse is erattic when it does show up.... and moving the mouse to the top 1/3rd of the screen makes it show for a second, but there is no menu bar. Trying to click where a menu bar would be does nothing. The mouse isn't able to leave the screen and go to a different monitor. Hot plugging doesn't seem to work either. What makes this very odd, is that I have an 8600 GT with device ID 0402 and dual DVI... and it seems to work perfectly. I may have made a mistake in my notetaking when I was trying NVCAPs.... so I'm going to go through the dozen or so most likely ones again, and post results on the forum with what they do... and maybe we can figure out a proper NVCAP to get these other 8400 cards working. (Note: Its currently a $40 card at Newegg, with a $10 rebate. If we can get it working right, it should be a great card for the money.) Link to comment Share on other sites More sharing options...
dagdu Posted June 19, 2008 Share Posted June 19, 2008 I have the 512 version of the 8400 GS. I have the same issue - no dual monitor support - I have DVI working with the following EFI sting - added to com.apple.boot.plist 6c0200000100000001000000600200000d00000002010c00d041030a010000000101060000010101 60000007fff04000e0000004e00560050004d0000002000000001000000000000000000000000000 00000000000000000000000000220000005600520041004d002c0074006f00740061006c00730069 07a006500000008000000000000201c0000006400650076006900630065005f00740079007000650 00000f0000004e5644412c506172656e740e0000006e0061006d00650000000b000000646973706c 17922000000400030002c006400650076006900630065005f00740079007000650000000b0000006 6973706c617922000000400031002c006400650076006900630065005f0074007900700065000000 b000000646973706c6179100000006d006f00640065006c0000001a0000004e56494449412047654 6f726365203834303020475320000000400031002c0063006f006d00700061007400690062006c00 50000000e0000004e5644412c4e564d616314000000400030002c006e0061006d006500000012000 004e5644412c446973706c61792d4114000000400031002c006e0061006d0065000000120000004e 644412c446973706c61792d4220000000400030002c0063006f006d00700061007400690062006c0 650000000e0000004e5644412c4e564d6163100000004e0056004300410050000000180000000400 000000004000800000000000007000000001e00000072006f006d002d00720065007600690073006 006f006e0000002e0000004e5649444941204765466f7263652038343030204753204f70656e474c 0456e67696e65205b4546495d Following NVCAP string used to create the string 04000000 00000400 08000000 00000007 00000000 Please share your results if any NVCAP works with dual monitor support - Link to comment Share on other sites More sharing options...
imperial_mic Posted July 24, 2008 Share Posted July 24, 2008 did this work? Link to comment Share on other sites More sharing options...
imperial_mic Posted July 25, 2008 Share Posted July 25, 2008 IT WORKED! Link to comment Share on other sites More sharing options...
quito Posted August 24, 2008 Share Posted August 24, 2008 Hi, same issue. Have you found a way to use the GeForce 8400 GS 512 with dual monitors yet? Best, Daniel Link to comment Share on other sites More sharing options...
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