Hodila jsem to do pcpartpicker.com a vyhodilo mi to (samozřejmě jen orientační W):

Intel Core i7-4790K 4.0GHz Quad-Core Processor			11W	-	88W
Gelid Solutions CC-TranQ-01-A 58.0 CFM CPU Cooler		5W	-	10W
MSI Z97-GAMING 7 ATX LGA1150 Motherboard			17W	-	70W
AMD Performance Edition 8GB (2 x 4GB) DDR3-1333 Memory		9W	-	9W
Kingston Beast 16GB (2 x 8GB) DDR3-1600 Memory			18W	-	18W
Seagate Barracuda 250GB 3.5" 7200RPM Internal Hard Drive	4W	-	20W
OCZ Vertex 4 128GB 2.5" Solid State Drive			1W	-	5W
Seagate Barracuda ES 750GB 3.5" 7200RPM Internal Hard Drive	4W	-	20W
Crucial MX100 512GB 2.5" Solid State Drive			1W	-	5W
MSI Radeon R9 290X 8GB Video Card				75W	-	300W
MSI Radeon R9 290X 8GB Video Card				75W	-	300W
Gelid Solutions FN-TX12-15 58.0 CFM 120mm Fan			1W	-	5W

Total:								221W	-	850W