Intel's next generation 32nm design, also known as Sandy Bridge, will enable low power CPUs with as little as 35W Thermal Design Power (TDP).

The lower TDP matters for notebooks and some quad-cores already have 65W TDP.  It's also important in the server market, as these guys wants to save as much as they can on their electricity bill.

Intel’s 65W quad-cores with the Yorkfield generation are out for a while and with the introduction of Nehalem architecture the power consumption went up and the most power aware Core i5 750S clocked to 2.4GHz has 82W TDP. That is Lynnfield quad-core who also have eight thread support.

We can only assume that Intel is talking about the quad-core CPUs and Sandy Bridge also enables 45W TDP designs that now include the graphics as well. It’s a monolithic core, the graphics and the CPU are power entity with the same TDP.

Some people really care about the TDP and want to have cool and quiet machine all the time. Let’s not forget the notebook and all-in-one market that will certainly benefit from such a low TDPs, as of Q1 2011.