Does this system have shared video/system RAM? If you have video memory shared with system memory, there is going to be memory that can't be tested unless you rotate memory chips or put in a vga card. In memtest+ 2.10 configuration, set for no reserved memory and watch the memtest corrupt the video output on a shared memory system. i have some several year old DL360's and ML370's and love em - especially hw raid, but i my local supplier hasn't had any for several months. Uptil a few months ago, password reset info on ebay was sent in the clear, so i have a very hard time trusting ebay. It would be great if something like LinuxBios / OpenBios could stresstest the machine and then disable any RAM addresses that proved flaky - whether ECC or not.