I have a older computer that has a AMD phenom(tm) II X6 1090T Processor (6 CPUs), ~3.2GHz with a ECS-A790GXM-AD3 motherboard and a Antec 500 watt power supply that is 9 years old but very reliable. My son has been doing basic video editing on it but I need to upgrade the ati radeon HD 4600 Series video card. Can anyone please recommend a better card that will work with this computer but yet is resonably priced since this computer is somewhat old. Any advice would be very much appreciated. Thanks.