GeForce GTX460 for my system?

Here my computer specs:

Motherboard : MSI 870-G45

Processor : AMD Athlon II X3 440 3.0GHz

Memory : 2x2GB DDR3 1333Mhz

Power supply unit : Built in 450W

Hard Disk : Western Digital Caviar Green 500GB, SATA 3 Gb/s, 32 MB Cache

Operating System : Windows 7 Ultimate x86

Graphics Card : MSI Nvidia GeForce GT430 GDDR3 1024MB 128bit



I'm planning to upgrade my graphics card to a GTX460, but I don't sure that whether my computer specs will bottleneck it or not. Does GTX460 is an overkill for my pc?|||I'm using AMD Athlon 2, 2.7 Ghz CPU and Sapphire 6970, 4 Gb of Kingston Hyper X DDr2 memory, Corsair TX850 W PSU and using BenQ XL2410T Gaming monitor ( 2ms, 120 hz). You have plenty of computer to run a 460, maybe you will need more of a power supply, not sure what a 460 needs for PSU. You will need PCIExpress X 16 slot and room.|||According to:

http://www.realhardtechx.com/index_archi…

You should have a minimum 500W power supply. You will have to check the 12V rail current on your current PSU to see if it meets the requirements of that video card. You will need two 6 pin PCI-E video power connectors...|||450W is the minimum power supply which a gtx460 consumes u should get atleast a 460W or 500W power supply of a good brand like coolermaster, Antec, Corsair, OCZ, seasonic , tagan and u'll be fine it doesn't overkill ur pc and personally i would recommend u a ATI HD6850 instead of getting a GTX460 as it consumes less power when idle and requires 500W of minimum power supply and is more powerful than GTX460 at lesser price......|||It will bottleneck a tri-core slightly. But overall it's not a bad choice for your system. You might want to consider a non-generic 550W or better PSU. The PSU's that come with most no-name cases are of suspect quality, and usually don't produce their advertised wattage.