Question about upgarde gpu

I want to upgrade my gpu and I have couple question.
I decided to buy the GTX560 Ti and now I have dilemma which model to buy.
I have 2 options (I live in ISRAEL so there is no large selection like in the US).
GigaByte GV-N560OC-1GI Or GV-N560SO-1GI-950.

This is my spec:
Processor: Intel Core i7 920 8M Cache, 2.66 GHz, 4.80 GT / s
Motherboard: Intel Desktop Board DX58SO
Memory: G. SKILL 3GB Kit DDR3 PC3-10666 CL9
Graphics Card: Sapphire ATI Radeon HD5450 512MB DDR2
Power Supply: Seasonic SS-500ET (two rail 12v 1. 17A 2. 17A)
Storage: Intel X25-M G2 80GB + Samsung 500GB Spinpoint F3
Case: HEC Compucase 6A19B
Screen: Samsung T220P - Resolution 1920X1200

The only cause of my dilemma is the subject of power consumption.
Is my PSU can handle with one of the GTX560 Ti model + core i7 920 stock?
I prefer the GV-N560SO-1GI-950 but I'm afraid that my PSU will collapse under the effort.
According to this presentation ( the GTX 560 Ti OC is 12% power consumption lower than stock GTX 560 Ti. Does that make sense?

Thank and good day
4 answers Last reply
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  1. I don't see how an OC card will have lower power use.
    Here is a full load example of that card, it looks to run the system and card to 450watt, for a gaming system.

    You'd want a 600-700 watt quality PSU to handle that to be safe from frying something.
  2. in the review the writer say that "On your average system the card requires you to have a 500 Watt power supply unit." and the system that analyzed is core i7 965 OC and I have i7 920 stock?
  3. You can always try with your PSU first, chances are good that even if it does not work it won't damage anything.
  4. Ok I will try! Thank!
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