Volgens Techreport is de IOH (northbridge) van X58 niet 45nm maar 130nm. Ik kan zo geen andere bronnen vinden die hetzelfde zeggen, maar het is misschien even de moeite waard om na te kijken.
Intel manufactures the X58 IOH using 130nm process technology that feels a little antiquated given the company's fabrication prowess. After all, AMD has been building north bridge chips on a power-efficient 55nm node since March. One might expect the X58 to present a thermal challenge; however, according to at least one motherboard maker, the chip is no more difficult to cool than Intel's last flagship, the X48 Express.
http://techreport.com/articles.x/15816
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