What size power supply would you say is appropriate for a high end desktop system running an Intel Core i7 2700K processor overclocked to 4.1GHz, six sticks of DDR3 memory, Nvidia GeForce GTX 580 videocard, solid state drive for the OS, a mechanical hard drive spinning at 7200 RPM for storage, and four 120 case fans, two of which have LEDs? Take your best guess and then hit the jump.
The eXtreme Power Supply Calculator is our online go-to source for better than quick-and-dirty estimates of how much power our proposed builds are going to pull, and the latest update adds a handful of new hardware.
Now included is support for AMD's new Radeon HD 6970 and 6950 videocards, as well as Nvidia's GeForce GTX 570 and GT 430 GPUs. On the CPU side, the PSU calculator now recognizes a bunch of new AMD Phenom II X6 processors, including the 1065T and 1100T, as well as a handful of other AMD chips.
The Lite version is still free to use, while the Pro version runs $1.99 and provides a few more details, such as +12V, +5V, and +3.3V rail breakdowns, recommended UPS ratings, and expanded multi-videocard support.
Now in version 2.5, the latest eXtreme Power Supply Calculator update adds support for a bevy of new videocards, including the Nvidia GeForce GTX 580, AMD Radeon HD 6870, and HD 5850.
For you workstation gurus, the latest version now recognizes a whole bunch of professional videocards, including 20 new Nvidia Quadro cards and 19 new AMD FireGL, FirePro, and FireStream GPUs.
Other additions include an option for a mini-ITX motherboard and Intel Pentium D 935 and 945 Presler chips. The Lite version is free to use and lets you estimate what your system power requirements will look like, while the Pro version (prices range from $1.99/3 days to $9.99/lifetime) goes into a bit more detail with info on individual rails (+3.3V, +5V, and +12V), recommended UPS rating, and more.
If you've never used the eXtreme PSU Calculator before, give it a whirl the next time you're in the market for a power supply. The free version includes a ton of configuration options to give you a better than ballpark estimate on what size power supply your build will likely require.
Protip: Under system type, choose the number of physical CPUs you have, and not the number of cores. So if you're running a Phenom II X4 processor, you'll choose "1 physical CPU."