BillyS - 9:51 pm on Jul 25, 2010 (gmt 0)
What I am saying is that just because it looks like a great deal doesn't mean it is. Energy consumption should be taken into account, sure, but you have to account for ALL consequences and all expenses involved before you can say that it will save money.
You're right, besides the fact inefficient CPUs are heat generators, they're also better at serving web pages. I'm thinking the payback is less than two years to replace all that equipment. Unfortunately, most of these data centers have trouble raising capital (even if the payback was short) so they don't make the investment. They just wait until the next replacement cycle.