Processor: Intel i7 920
Motherboard: ASUS P6T SE LGA 1366 Intel X58 ATX Intel Motherboard
PSU: HEC Cougar 1000 1000w
Memory: 3x DDR3 2GB 1333Mhz Kingston
HDD: SATA 640Gig Western Digital
DVD Optical drive: DVD WRITER Samsung WHT/BLK 22X SATA
Video card: Power color HD5770 GDDR5 PCIE 1GTV256B 2DVI HDMI
Monitor: 22" Philips 220e1sb
HEC is not known for high quality power supplies. The first red flag is the one year warranty. High quality power supplies come with a 5 year warranty. The second red flag are the specifications. They are highly overestimated. The unit can't deliver the goods. The third red flag is your list of components. You do not need a 1,000 watt power supply. It is beyond overkill
The general rule of thumb is a high quality 500 to 550 watt power supply with sufficient current (amps) on the 12 volt rail(s) can easily power a system with any single video card made. A high quality 700 to 750 watt power supply with sufficient current (amps) on the 12 volt rail(s) can power a system with two video cards operating in dual mode. There are a few exceptions like the new ATI Radeon HD 5XXX series cards which use less power due to their energy efficiency.
Here are the ATI recommended power supply requirements for the new ATI Radeon HD 5770 and 5750 video cards that just became available:
450 Watt or greater power supply with one 75W 6-pin PCI Express® power connector recommended
600 Watt and two 75 watt 6-pin connectors for ATI CrossFireX™ technology in dual mode
That's for the entire system. Figure about 40 amps on the 12 volt rail for Crossfire mode.
Before purchasing a new psu you will need to decide whether you will eventually have a pc with one or two video cards.
Corsair, PC Power & Cooling, and Seasonic are some of the brands that have a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty. Lately we've been seeing a few other brands offering some high quality units.