Hello, I'm Jewel with Kingston Technical Support and would like to offer our assistance. I can confirm that the part number KVR13N9S8/4 is compatible with your motherboard M5A78L-M LE and CPU FX-6100. For any further assistance, feel free to call us at 1-800-435-0640 (USA and Canada only) M - F 6am - 6pm PT and I or another available Technician will assist you. Please be sure to have the part in question on hand when you call.
Thank you for selecting Kingston as your upgrade partner.