Re: Going from 65W to 45W on the desktop means a reduction of 30% in power (65W * 70% = 45.5W). So SC Turions will go down to 25W (35W * 70% = 24.5W) and 17W (25W * 70% = 17.5W) which are below Core Solo. In addition, Turion X2 will go to 25W (35W * 70% = 24.5W).
Pete, 30% may not be a bad estimate for AMD's 65nm power reduction, but you have to keep in mind a couple of things.
First, this reduction only happens at similar frequency numbers. In order to hit competitive frequencies, like where Merom already is today, AMD will have to increase the power back to today's levels.
Second, launching a partial line of 25W CPUs may be a great idea, but Intel can easily hit the same power levels. They already have a large series of low power chips, such as:
- L7400 - Core 2 Duo @ 1.5GHz, 17W
- L2500 - Core Duo @ 1.83GHz, 15W
- U2500 - Core Duo @ 1.20GHz, 9W
I suspect that 2.0GHz @ 25W should be easy for them, especially when the new steppings come out (Core Duo already has the benefit of a more refined stepping, since it was launched earlier).
Third, there's no sense in comparing against Core Solo, since this part is practically EOL. Even the el-cheapo Pentium T2060 is a dual core part, and it's beating the pricing on single core Turion CPUs today. AMD cannot compete in this space with single core CPUs. These will be relegated to Celeron/Sempron branded products.
Fourth, you'd have to assume that Intel is sitting still to believe that Turion will surpass them. On the contrary, Intel already has another bin or two planned this year, and in addition they will have 45nm parts by this time next year.
Re: Barcelona derived mobiles will do even better when each core can have its own voltage.
And this is just speculation, since nothing is known at this point about Barcelon's power profile at mobile wattage levels. Your assumptions are obviously wishful thinking.
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