What's to discuss. This is just going to incite flames.
The 6990 is the big dog, the king, the fastest card.
590 is a bit slower and unfortunately unreliable. What's nvidia supposed to respond with or try to say ? 'Well, um, our card catches fire and yours doesn't'
lol
The latest drivers nvidia has released for the 590 have the card downclocking below 600 Mhz. The card is dropping as low as 550mhz when the OCP kicks in while gaming.
So nvidia is now having to reduce performance from stock to keep the card stable. Hopefully we will start to see review sites...
http://translate.google.com/translate?sl=auto&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2Fforo.noticias3d.com%2Fvbulletin%2Fshowpost.php%3Fp%3D3960849%26postcount%3D352%27
http://img845.imageshack.us/img845/2889/quemado.jpg
And another one.
Just a matter of time...