Which is the best online Power Supply Calculator? I've used the eXtreme one at http://outervision.com/power-supply-calculator but I'm not sure if it is exaggerating how much power I would need. Any better?
Also, would a 550W PSU with 80-85% continuous power be sufficient for this power usage (pic related)?
>AMD Phenom II X4 945 3.0GHz Quad-Core Processor
>Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler
>Gigabyte GA-870A-UD3 ATX AM3 Motherboard
>Corsair XMS3 4GB (2 x 2GB) DDR3-1333 Memory
>Corsair 4GB (2 x 2GB) DDR3-1333 Memory
>Samsung 850 EVO-Series 250GB 2.5" Solid State Drive
>Western Digital Caviar Black 1TB 3.5" 7200RPM Internal Hard Drive
>PowerColor Radeon R9 380 2GB PCS+ Video Card
>Antec Three Hundred ATX Mid Tower Case
>BFG GS-550 550W Power Supply ATX V2.2 EPS 12V 24PIN 6PIN & 8PIN PCI-E 140MM Fan 1 Year NCIX Warranty [BFGR550WGSPSU]
>Microsoft Windows 7 Home Premium SP1 OEM (64-bit)
The problem is that the PSU I already have only has ~400W continuous usage, which according to the Power Supply Calculator, will be insufficient for this build. I intend to overclock the CPU to at least 3.4 Ghz, higher if possible. Not sure if I should upgrade the PSU or just buy a GTX 960, which uses less power.
They're all bullshit and massively overestimate what you need. My entire system draws 150w at full load, this calculator thinks it uses 300 and recommends a 500w PSU.
Just do some actual research on what your components really need.
>Your current PSU is fine.
>Gonna need a nuclear reactor to power that
So which is it?
Depends, really. You can get a Kill-a-Watt meter to get a good idea, though. Had an old PC I was using as a pfSense box that was costing $200/yr in electricity. :(
Those parts will work with your current PSU, as long as you don't overclock your shit. If it turns out that you don't have enough power, a decent PSU will shut down to prevent damage. So trying it out won't hurt and if it turns out that your computer randomly shuts down when it's under stress, you'll know that it's time for a newe PSU.
Any single gpu system with modest intel cpu will draw less than 500W (most likely around 350w-400w under full load), so going with something like a 550-600W power supply is perfectly fine if you get one rated 80+ gold or higher. Since those are underrated in wattage, you'd be within the optimal operating wattage for maximum efficiency.
Most 80+ platinum power supplies are dead silent as well and don't even turn their fan on until 60%+ load.