Today, ECC technology is very rare in desktop and notebook computers as the technology commands a higher price than their standard counterpart: For example, 1 GB ECC DDR-333 are priced 56% higher than non-ECC devices ($97 and $62, respectively), according to Pricewatch.com. The difference for 2 GB DDR-400 modules is 79%. In the DDR2 space, the premium climbs to more than 90% in most segments. ECC also has an impact on system performance as especially the ECC's RAM check consumes significant time when booting a computer. Overall, ECC memory is generally believed to be about 1% to 3% slower than memory modules without the extra circuitry.
Vista is just gonna be a pain. I'm not even excited about it anymore.