In a whitebox modification I installed an ASUS M5A97 R2.0 motherboard that has the UEFI BIOS. Other existing hardware was carried over from the previous ASUS M4 motherboard without the UEFI. Relative parts involved here are an NVidia Geforce GT 430 graphics card, WD SATA 500Gb boot drive, and a widescreen Viewsonic VA2012wb monitor. My Windows 7 installation from the previous motherboard has been "repaired" so that it boots properly with the new hardware (motherboard/chipset).
1st problem is that I get the non-functional UEFI BIOS screen display often mentioned by HDMI users - display overszed for the screen (showing only upper left quarter of the display in the full screen space), "garbled" screen display wherein not all pixels are activated (blacked out). But my monitor is connected via DVI, not HDMI. Resolution and display are fine once I get into Windows. ASUS Support says "update the BIOS" -- did that, no change! Then their only resolution is that my video card or cable or monitor "must be bad". :/ They're not bad - worked just fine on previous board without UEFI. Oddly enough, my only course is to connect my monitor with a VGA cable, giving up the benefits of DVI, and then I get the proper and functioning BIOS screen display. Web posts show me that this screen display problem has been around for at least a year for HDMI users, but can find no proper fix for that or for DVI. Help?
2nd problem is that - once I can get into the BIOS setup - I have to set my SATA hard drive settings to IDE for Windows 7 to boot up properly. Am I losing the benefits of SATA by setting the drives down to IDE?
Not liking having to "turn down" my PC to get it to work right in this UEFI stuff.
EDIT: OK, think I found the Reg Edit solution to the 2nd problem. But the 1st video problem continues.