For those of you that don't know what these are. They are as fast as a HD7970! I couldn't go the route of AMD and the HD7970, so I bought a couple of these to keep me going, because gaming @ 2560x1600, I know SLI works, and it works very well. I don't want to sit around with 2 HD7970's knowing AMD are not interested in fixing the CF problems, because there excuse is, 'Only 1% of house holds use CF' (All I can say is, and from personal experience 'Once bitten, twice shy). Anyhow these are as fast as a HD7970, and with the extra PCIe adaptors, I see some great OC coming. (Over 1Ghz core should be easy).