Im not quite sure what exactly that means, but I think you can buy a shader-overclcoked version of the card, not just some magical card that can overclock shader its just a pre-oc'd card.
So not really needed but if its just slightly mroe money Ill probably get it until I get my wc'ing.
"We found out that Geforce 8800GT comes in five possible variants and each variant has its 512MB and 256MB version.
The first, as you can imagine, is the reference design with 600MHz core and 1800MHz memory clock. The 256MB version of this card will have the memory working at 1400MHz.
The second is the reference design + SPOC, Shader Processor Overclocking and it work's with the same clocks as the reference but with faster Shader. It was not specified what should be the Shader speed but this is up to AIB's.
The third kit is called Cost down $14 +SPOC and as you can imagine the Shaders are still overclocked, the GPU and memory are the same but they all can be overclocked. This is an 8 layer PCB board.
The fourth SKU is the scary one, it is called Cost Down more than $14 +SPOC and this card comes with 6 layer PCB and 256MHz memory at 1400MHz only. This is certainly the cheapest card from this generation.
The last but not the least is simply called Native HDMI and it comes as the 512MB or 256MHz part and you can get the picture what is the focus of this card. "