Dell Dimension E521 works great!
This machine works fabulously with ESXi 4.0 u1 Dell customized! It worked so well, I installed it once, and was able to use it immediately, no flaws, no work-arounds, I can't express how easy it was to install. All I had to do was put in an Intel Pro/1000 nic before installing because ESXi doesn't like the onboard nic, surprise surprise. I'm running virtual DCs now, no issues whatsoever. Gonna be moving to virtual Exchange and everything as well. Just using the stock E521, as it came from the factory, nothing special, using the 250GB SATA drive that it came with, the onboard video card, etc. I like the AMD X64 dual core CPU, I wish it was a quad core, but what can you do. I maxed it out with 4GB DDR2.http://www.dell.com/us/en/dfh/desktops/ ... s=22&s=dfh