Ars has the details. Bottom line? The thermal design power (TDP) rating of the Core 2 Duo (ie, Merom) T7600 (2.33 GHz, 4 MB cache) is 34W, just 3W greater than the Core Duo (ie, Yonah) T2700 (2.33 Ghz, 2 MB cache).
Remember that Merom is pin-compatible with Yonah, so if you buy a Yonah laptop* today you can swap in Merom later. All the recent sturm und drang about Microsoft’s decision to limit HD-video playback to only 64-bit devices is therefore rather overwrought.
For anyone in the market for a notebook, my updated advice is to go ahead and buy a Yonah-based laptop now rather than wait. As usual I recommend NoteBookReview.com for buying advice, though you are also welcome to leave a comment if you’d like to solicit my opinion on a given machine.
NBR also has a piece on the Merom launch, which includes a most recent list of available models with Core 2 duo from the major manufacturers. And, because not all laptop manufacturers are shipping Core Duo-based laptops with the correct settings in Windows XP to take full advantage of the dual-core performance, they also have a registry hack that all Yonah/Merom owners need to make sure is in place. I’ve reproduced it below the fold.
*if the motherboard uses Intel’s 945 Express chipset.
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