ThinkComputers.org posted a review of the Intel Core i5 661 Dual Core LGA 1156 Processor. Here's a bit:

So where do the Core i5 600 series processors fit into the scheme of things? Well, if it means anything, a quick look at my favorite online retailer found 20 H55 motherboards. Out of the 20, 19 were mATX boards. There was one H57 board, and it was also mATX.

So I'm thinking mostly HTPC, but really any application where a processor with decent power is needed, but 3D graphics won't be used. Actually it would work great for my main rig, the one I'm at right now. I do occasionally mess around with a PopCap game or two, which take very little graphics power, but mostly I'm typing, editing photos, doing research, and reading email, Facebook, and Twitter. It would definitely consume less power than what I'm using, the entire rig likely would use less power than my video card alone. And it would definitely take up less space than my full tower. Hmmmmm…

The Intel Core i5 661 has plenty of power for doing those day to day tasks and maybe not so day to day like Photoshop, video editing, etc. Overclock it, which is very easy, and you will get a good performance boost to make those tasks run even faster. I've been assured by a very trusted fellow reviewer that HD video content is excellent, so it would be perfect for that HTPC. The i5 600 series processors will definitely make their way into consumer PCs, and I feel that is probably the intended market.

As I mentioned, there are four CPUs in the Core i5 600 series. Of the four, the i5 661 is the only one with the GPU clocked at 900mHz, the others are at 733mHz…so I guess that the 661 is the graphicsmeister of the series. The high graphics clock also makes this processor run at up to 87 watts, 14 more watts than the other processors in the series.