I have a problem. I just bought a brand new kv7-v motherboard and AMD Sempron 2600+ from tigerdirect. I went home, mounted the board properly, plugged everything correctly (I think/hope). When I start it up, it seems to start fine with the default settings...but it gives me the CMOS Checksum error and I have to push F1 to continue. When I go into the BIO and change it from the defaults to user define with the EXACT same frequency, my computer shuts off and sounds an alarm. I have tried changing the power supply but I still get the same problem.... Can anyone help me?