The Northbridge Chipset fan on my ASUS A8N-SLI Deluxe failed completely on a Friday morning... After a quick bit of Google Research via my laptop, it turned out that this is a well-known problem with this Mobo, and the Zalman ZM-NB47J Heatsink seemed to be the advised way to go, according to all of the "techie" websites. So I placed the order with QuietPC on Friday morning, and yet just went for the First Class Post option, as £24.50 for guaranteed Saturday delivery was a bit ridiculous for < £5.00 worth of parts...! BUT - it still arrived on Saturday morning, perfectly wrapped. I've just finished installing it, and it's cured all of the issues - noise & over-heating. What a great service they provide. This is my 3rd purchase from Quiet PC over the years, and while the previous two weren't disappointing in any way, this is by far, way "Above & Beyond". System cooling requirements? By tomorrow? At a fair price? With a smile? It's a "No-Brainer" - QuietPC. Ciao, Gelert.