I’m building a new desktop PC and these are the components I’m putting in:
MoBo: ASUS P5QL PRO
CPU: Intel Core2 Quad Q9550 2,83GHz
VGA: ASUS PCIe EAH4850/HTDI/1GB DDR3
HDD1: WD SATA2 1TB 32MB 7200RPM CAVIAR BLACK
HDD2: WD SATA2 1TB 32MB 7200RPM CAVIAR GREEN
RAM: KINGMAX DDR2 2GB/1066MHz PC2-8500
I’ll be also throwing in a wi-fi card: ASUS WL-138GE 54g Wireless PCI Card
In addition I frequently have an external USB HDD and HTC Touch HD WinMo phone plugged in via USB.
I am not gaming (except for the Vista Ultimate Extras, such as Chess and MahJong…), but I am frequently working with photo/video editing apps.
My question is how powerful PSU I have to install to run this baby w/o a problem…?
Any suggestions on BUDGET case and PSU are more than welcomed.
eXtreme Outer Vision has an awesome free PSU calculator that is very accurate. The lite version (free) gives you a minimum wattage required but the pro version ($10 lifetime access) gives you required amperage on each rail. Very good utility to use if you plan on overclocking, watercooling, or upgrading...
Yes, but from the total wattage needed you don't know what the breakdown is between the 3.3V, 5V, and 12V rails. It just gives a generic total PSU rated wattage. If you're smart enough (and have enough time) you can add up the required amps from all of the components voltage/amperage requirements but I don't mind paying $10 for a lifetime license to have something else do it for me instantly. I'm constantly upgrading so i use it regularly to make sure my existing PSU will be able to handle the new loads...
Because the various components installed determine how much of your actual wattage used is 3.3v, 5v, and 12v. This table is definitely outdated but but does a good job of illustrating my point. Neglecting overclocking, the PSU calculator tells me my minimum PSU wattage is 434W with minimum 3.3v/5v/12v amperage ratings of 8.2A/11.5A/29.2A resulting in wattage percentages of 6.2%/13.2%/80.6%. Just by overclocking the CPU or GPU the 12V percentage will rise. Using the free version is safe because today's PC's and PSU are only limited by the 12v rail (heavily used by the CPU and GPU) so a detailed breakdown isn't really necessary. I just thought I'd let you know a more in depth evaluation is available with the paid version. For most systems and PSU's the free version would work just fine.
^Ahh.... I see what you mean.
At any rate, it's not all about the amps,watts,etc listed on the box. What really mattes are:
1. Can the PSU ACTUALLY deliver the needed wattage/amps? Many low quality PSUs can't deliver their advertised wattage.
2. How stable are the lines/rails?
3. How good are the internal components, esp caps?
These are the things that count. It doesn't matter if you'r PSU has the needed wattage, but it can't provide it with out going out of specs on rail stability,etc. That's why one should take a look at LOAD TESTS done by people like jonnyguru: http://www.jonnyguru.com/