MSI mainboard with black socket to show AM3+
Some manufacturers have AM3+ support to some of their AM3 motherboards via a simple BIOS upgrade.Mechanical compatibility is there and it's possible for AM3+ CPUs to fit in AM3 boards, provided they can supply enough peak current. Another issue is the use of the sideband temperature sensor interface for reading the temperature from the CPU. Therefore, some CPU PWM fan pins may only run at full speed. Also, certain power-saving features may not work, due to lack of support for rapid VCore switching. *Note* that use of AM3+ CPUs in AM3 boards is not officially supported by AMD.
AM3 Phenom 955 i was trying t put a AM3+ CPU in a AM3 board tghen found out well i cant do that....so i tried to put the Phenom back in the board well i did that reset the cmos and everthing.....well on th board readout its FF and NO display
Ok, well I think you found your problem. That may have messed with the contacts in the socket as well so good move getting that checked. If they do not replace it then I suggest going for a 990FX board as an upgrade anyways because Piledriver is optimized for 9 series chipsets