I am under the impression that the new bios helps this overclocking issue with the dh...not tried it yet. Also, the p5b will not allow for setting the mulp on your cpu up and down like the DH will, at least if you are lucky enough to have a cpu that will unlock anyhow. The DH will also support SLI when Nvidia is done testing the drivers for it, and the 975 simply handles memory better (speedwise). There are other issues I am forgetting that led me to not wait for the P5B at the time...I am forgetting now........