I want to upgrade my gfx card from a 9500gt to either a Radeon 6850 or a Radeon 7770. My question is can my power supply handle it? I really cant afford at this time to buy a new psu. Its came with my cheap case and its a Codegen Dual-575W. It also has these numbers and words which makes no sense to me. I also have a X6 1045T that i plan to overclock to 3.5Ghz soon nad 4Gb DDR3 1333 Ram
Orange 3.3V, 14A
RED +5V, 18A
Yellow +12V, 14A
Purple +SVSB, 2A
Blue -12V, 0.8A
(+3.3V&+5V=120W Max; -12V=9.6W Max. ALL OUTPUT is EXTEND to 575W Max.
How can a 575 Watt power supply have only one +12V rail with a 14 Amp current rating?
The numbers just don't add up or they only add up to a 300 Watt power supply.
I notice that this PSU also doesn't have any PCI Express supplementary power connector(s).
For a system using a single Radeon HD 6850 graphics card AMD specifies a minimum of a 500 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 25 Amps or greater and have at least one 6-pin PCI Express supplementary power connector. Some of the non-reference design Radeon HD 6850 graphics cards require at least two 6-pin PCI Express supplementary power connectors.
For a system using a single Radeon HD 7770 GHz Edition graphics card AMD specifies a minimum of a 500 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 23 Amps or greater and have at least one 6-pin PCI Express supplementary power connector.
Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most critical factor.
Overclocking of the CPU and/or GPU(s) will require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.
You may find power supplies on the market that supply more than enough Wattage to run the system. However, some of them lack Sufficient Amperage capacity on the critical +12 Volt rail, which is necessary to properly power the critical components in the system (i.e. CPU and GPUs). This is the reason why graphics card manufacturers may overstate the power supply wattage, usually by at least 50 Watts, in an attempt to take into account some of those power supplies that have the weaker +12 Volt rail(s). Your Codegen power supply doesn't even come close to meeting the system power requirements for either the Radeon HD 6850 or the Radeon HD 7770 GHz Edition based on the power supply specifications that you've provided.