Hi this is my first post here so please be nice to me Anyways I wanted to build a pc with this hardware... and i dont know what power supply unit i should take. Can you please help me? 2 x Graphics card NVIDIA GeForce GTX MSI N560GTX-Ti Twin Frozr II/OC NVIDIA GeForce GTX 560 Ti, 1024 MB, 256 Bit, PCIe 2.0 x16 € 212,90* x2 = € 425,80* 1 x CPU Socket 1155 Intel® Core™ i5-2500K 4x 3300 MHz, 4x 256 kByte, 6144 kByte, Sandy Bridge € 184,90* 1 x Mainboards base 1155 MSI P67A-GD65 (B3) Intel® P67 Express, ATX, 2x PCIe 2.0 x16, SLI, Crossfire, 1155 € 152,90* 1 x main memory DDR3-1600 Corsair DIMM 8 GB DDR3-1600 Kit 8192 MB, CL9 9-9-24, 2, PC3 12800 € 76,90* I don't know so much about power supply units so your help is greatly appreciated! Also excuse my english, my first language is German. Also will this pc work together ( i mean do the parts work well together.. of course i need the right data links for every part so you could advice me, i prefer when the price performance ratio is the best) Thanks for your help!