I know that questions have been asked alike. But the answer varies. People always saying better to have 26 amps on the 12V rail. Quote: [The HD4770 draws a maximum of 80 watts. 80 watts / 12 volts = 6.7 Amps. If the rest of your system is typical (a 100-watt CPU, 1HDD, 1ODD, mobo + ram), they will pull another 13 amps or so on the +12V under full load. So look at your PSU's label and see if it can deliver at least 20 Amps on the +12V. If it can, it should work.] But what if i got 2 12v rails? 2 and each supply max 18a. Can i took it as 32a? CPU: Q6600 95W RAM: 2GB 1 hd and dvd drive Motherboard: MSI p45 platinum Power supply: SPI ATX 400-PN Details: OutputVoltage MinimumLoad NormalLoad MaximumLoad +3.3V 0.5A 10.0A 28.0A +5V 0.3A 7.0A 30.0A +12V1 1.0A 7.0A 18.0A +12V2 1.0A 8.5A 18.0A -12V 0.0A 0.4A 0.5A +5Vsb 0.0A 1.25A 2.5A *+3.3V and +5V total output not exceed 180W *+12V1 and +12V2 total output not exceed 348W *+3.3V & +5V & +12V1 & +12V2 total output not exceed 385W * Total output for this subject power supply is 400W Efficiency: 70% minimum measured at normal AC mains voltage and frequency with full load Sorry for the rough data presentation. Please tell me as i really worried about this.
It should be fine, as I understand it, a PSU with 2 +12V rails will distribute power to the cpu using one rail, and the other rail will provide power to your other components such as your gpu. Generally, I get PSUs with a single +12V rail, just because it is easier to balance out all the power requirements across all components.
Hi According to the ATI website, you need a 450w power supply. Link Is your Q6600 overclocked at all?
For a customer i did a build. Corsair CX400w Phenom x4 945 Radeon 4770 640gb disk 1 ODD The power supply can easily power this hardware.
The system in my sig pulls about 350W from the wall (which is only less than 300W from the PSU). Any decent 400W unit should be just fine.
