Notebook Processor Upgrade
Today, my aging notebook finally got a new CPU. The Thinkpad R400 was one of the cheapest one could get, about three years ago. In the original configuration it got a Core 2 Duo T5670 and 1 GB of DDR3 RAM.
The RAM was first upgraded to 2 GB and a few weeks ago finally to 8 GB. The RAM supports an FSB of 1066 MT/s, but the T5670 is stuck at 800 MT/s. Additionally the CPU does not support any kind of virtualization.
So I got a shiny old P8600 from eBay. It supports VT-x, VT-d and has a FSB of 1066 MT/s. As a bonus it got a TDP of 25 W instead of 35 W, that the T5670 required.
Installation of the CPU was easily done within one hour. Thanks to Lenovo for providing an easy to follow guide to replace your CPU. See here.
I did not run any benchmarks comparing the performance with the two CPUs, but the P8600 is definitely quiet a bit better (when trusting the Windows Experience Index).