Originally Posted by X-PREDATOR
so you would have him buy a smaller psu..with less headroom for expansion and if he does expand to sli/Xfire maybe...hell have to upgrade the psu again?
doesnt make sense shilka...
were both tryin to help him..so wouldnt it be better getting a proper 700-850w psu from the start?
yes its wasted power..but having more to play with also makes the psu not over work itself by being to close to the max!
It makes perfect sense if you know how PSUs work on a component level(optional) and understand what kind of power draw the parts being used have.
Lets assume the worst:
1. 24/7 100% system load
2. 300W GPU
3. 150W CPU
4. 20W from RAM
For a grand total of 470W.
Asuming a 550w unit, that leaves a total of 80W of power for EVERYTHING else in the system.
Thats 15+ mechanical HDDs and Fans etc.
Taking into account how the whole 80+ Cert system(and PSUs in general) works you can also assume that buying a massive overkill PSU is less efficient than running a PSU at just under its rating, meaning you are spending more money on your PSU ourtight AND more money over its lifespan on your electricity bill. Granted that is probably a fairly small amout, but its still there.
Same goes for "stressing" a PSU. A good PSU can and will run near or at its rated wattage for its entire life with no issues as they are rated for constant voltage not peak voltage, so there is no reason not to figure out what kind of power your parts will need, add 50 watts or so and call it good.
Buying a bigger PSU "just in case" you want to go multi-card in the future is a waste of money.
I can count on one hand how many times ive seen people spend the extra for a bigger PSU and actually buy a second card later over the past several years.
Buy what you need, not what you MIGHT need.
That being said, OP, Look at the list shilka linked for something ~500W and see whats available in your area.
Let us know what you can get and we will see what will do the best for the least money.
As for the rest of the build, you selected good parts.
Most of them are kind of a "close your eyes and pick one" situation in my opinion, but i'm sure we have members who can shed more light on the specifics than I can these days.
That is, if you want help with them.