If you plug 11188-01-40G into Google , you'll find it references a Sapphire HD 6950 videocard with 1GB of GDDR5 memory, or half the amount of a standard 6950 part. You can already find a handful of U.K. vendors selling the new card, though it hasn't shown up on familiar U.S. sites like Newegg just yet.
The obvious upshot here is that these cards will cost less than their fully equipped brethren. Sapphire's above mentioned model is the only one we've found, but so far it doesn't appear anything other than the amount of RAM has changed; clockspeeds and other features still match up.
While Sapphire appears to be leading the charge, German website HT4U.net says other vendors will soon follow, offering both HD 6950 and 6970 cards less memory.
Would you be interested in a Cayman card with 1GB of memory?