Does AMD Phenom II X4 955 BLACK EDITION 125W(AM3) really supported by ASUS M5A78L-M LX V2(AM3+)? Looking at the CPU support list, it does. But looking at the mobo socket, there's one pin difference. Mobo gallery: https://www.asus.com/Motherboards/M5A78LM_LX_V2/gallery/
Issue: https://www.google.com/search?q=am3+vs+am3%2B+motherboard&biw=1600&bih=794&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiI6oPq2_PQAhXMuo8KHQcqDIYQ_AUIBigB#tbm=isch&q=am3+vs+am3%2B+motherboard+one+pin&imgrc=VkHchecNOrJWeM%3A
Issue: https://www.google.com/search?q=am3+vs+am3%2B+motherboard&biw=1600&bih=794&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiI6oPq2_PQAhXMuo8KHQcqDIYQ_AUIBigB#tbm=isch&q=am3+vs+am3%2B+motherboard+one+pin&imgrc=VkHchecNOrJWeM%3A