Thanks to the guy's @ 3DChips-fr.com for sending this in! They tell me that they have snagged the spec's for Asus's GeForce FX 5200 AND 5600 Ultra graphics cards! Here's a quick translation as the site's in French :D

ASUS which for our greater pleasure emcombre of NDA is come to reveal the specifications of its Ultra GeForce FX 5600 (NV31) and 5200 (NV34). ASUS will launch 3 GeForce FX 5200 embarking from 128 to 256 Mo of SDRAM GDR 128 bits.

V9560 Ultra/TD Memory: 128 Mo Frequencies: 325/550 MHz VGA, DVI-i and TV