Ok, got a brand new eVGA 128mb GeForce 6600GT card from Newegg yesterday. I stayed up until 2AM working on this thing and could not get it to work. What happens: I've got the latest drivers from nVidia installed. I take out my existing 5700LE, plug in the 6600GT, making sure to plug in a power dongle to the card (as is recommended). When I fire up my computer, the video will have severe issues....the BIOS boot text shows up skewed, some of the letters are randomly replaced by numbers and gray streaks. XP will start to boot, but there will be vertical blue lines on the black loading screen. As soon as it boots into windows, boom.....BSoD. I've tried this on 2 different systems: System #1: Biostar M7VIP mobo VIA KT333 chipset 1 gig Kingston DDR2100 AMD Athlon XP1800+ Thorougbred @ stock speeds 80 gig Maxtor IDE HD, 7200 RPM 350w PSU/500w PSU swapped in Windows XP Pro w/ SP1 System #2: Biostar M7NCD-Ultra mobo Nvidia nForce2 chipset 512 mb OCZ DDR2700 AMD Athlon XP2000+ Barton @ stock speeds 2x 80 gig Seagate IDE HD's 7200 350w PSU/500w PSU swapped in Windows XP Pro w/ SP1 I've been beating myself up trying to figure out what's going on. I tried switching the PSU's between the systems with no luck, so I assume it's not either of my PSU's. The error is the same on both machines...the same BSoD. This is the card: http://www.newegg.com/product/product.asp?item=N82E16814130220 Am I missing something simple? Help me out if you can.