I just did a quick google search and every link I clicked on indicates this is a bad CPU. Try it with one CPU at a time. Does it have a CDROM, trying booting from a bootable ISO. Try Linux. 
Hi, I recently got a Dell PowerEdge R610 II Server 2x X5650 6-Core / 96GB RAM / 2x PSU/ SAS RAID on ebay and put two ssd inside. No other drives I am quiet frustrated because I am spending the last 3 days trying to install any Windows Server (2008 r2 or 2016) with usb stick. I even tried 3 different USB sticks. What happens it that after booting in UEFI, I get either Black Screen or Critical Process Died or Crypto Library Internal Error or A few seconds of spinning windows or Auto Config that turns into black. Most of the time just black screen and computer keeps running without doing anything. Here is what I tried: 2xSSD in Raid 0 - Set up in Raid Controller and Initialized Successfully. Updated BIOS to the latest manually ftp.dell.com not available anymore! Put SSD Drives in different slots First Setup was 1+2 Second Setup was 3+4 Tried 3 different USB Sticks with different OS Different OS: WIndows Server 2008 Windows Server 2016 Re-Created RAID 0 and Initialized Drives 2x Reset Bios and set things to default in Dell Manager. T ried BIOS AND UEFI, change settings. Run Hardware Check without any issues. Replaced a complete set of monitor, keyboard and mic 2x Switched CPU 1with2 and 2with1 Switched Memory Banks Bios Battery In/Out 30sec Hold Button Reset Used one Power Supply   Not sure what else I can check anymore. Running out of ideas, getting tired and after reading 20 forums and trying different things for 3 days with over 50 reboots. Can anyone help? Is there a hardware problem? Software? Or what is going on? Please advice with detailed steps. Thanks alot!
Dell R610 - Can not install Windows Server - Black Screen