Now im planning to upgrade the video card to the 6870 which requires 2 6 pin connectors and i dont believe this psu has any. It comes with adapters for the 4 pins that i have but ive read that it still might not supply enough power to the video card. Its all gibberish to me, i never really learned about rails and voltages and stuff.
My power supply seems pretty cheap, but im hoping i can slip by with it.
Yes, nominally, it is not as powerful as yours, but:
It will produce its rated power.
It has a pretty heavy 12 volt rail (44 amps).
It is built by Seasonic, one of the best PSU builders in the business.
For a system using a single Radeon HD 6870 graphics card AMD specifies a minimum of a 500 Watt or greater power supply. The power supply should also have a combined +12 Volt continuous current rating of 28 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.
The XtremeGear 600 Watt (PSAZ-CP600), with its combined +12 Volt continuous current rating of 31 Amps should be electrically sufficient.
For a power supply that claims to be SLI/CrossFireX Ready there should be at least two 6-pin PCI Express supplementary power connectors wired to it.
My advice is to run it. If your pc powers off or freezes after a heavy load, replace the PSU asap. Continued use with it locking, powering down will damage other components, like your motherboard. Spec wise however, I agree, you have the amps on the 12volt rails to handle it based on the specs and it shouldn't be an issue.