PSU Choices 600W

I am basically just squeezing a little more power out of a old Core 2 Quad system by adding a R9 280.

Why do I need one of the very best power supplies?

I'm not looking to overclock the system and I'm not building a super computer. If anything I will most likely buy a sub-standard I5 3.5GHz+ plus when 5th Gen comes out.
 
What happened was I had a 5 year old Packard Bell from PC world. The MB basically blew so I replaced it with a cheap MATX Intel G41.

So the specs + power requirements are:

G41 Motherboard = 50 Watt.
Heatsink+Fan = 5 Watt.
Core 2 Quad CPU = 95 Watt. (Similar to a modern day AMD A4 or Pentium).
4GB Ram = 15 Watt.
2 X 7200RPM SATA hard drives 50 Watt.
1 x DVD-RW 25 Watt.
2 Case Fans 5 Watts

PLUS

1 X R9 280 = 250 Watt.

The total system power needed is 495 Watts.

All my USB stuff is connected to a hub with its own power.

495 / 600 x 100 = 83% load.

So yes I agree I need a 80plus PSU but wouldn't that Silverstone do the job without falling apart? Since its rated up to 85% efficiency? And if I needed some wiggle room go for a 650w instead?
 
pastymuncher said:
Because cheap power supplies are built down to a budget using poor internals, are innefficient, get noisey quickly due to increased fan speed to cool the cheap internals and if they fail can take other components with it. You haven't been recommended any of the very best power supplies that run to over £100. What you have been recommended are quality mid range psu's that we would use ourselves. If you want to stick something cheap in your pc then go ahead. Just don't expect any help when things go wrong.
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No probs. So this superflower PSU. If my load is 495 would I be best going with 550 or 650? And will this PSU save me money on energy bills?
 
pastymuncher said:
You won't be that high. The rig in my siggy only pulls a max of 420w at the wall. The Superflower HX550 is a very high quality unit, can deliver just about all of it's power (546w) on the all important 12v rail and is gold rated so is very power efficient. It would be more than enough for your pc now and even when you upgrade to a i5 in the future. If you have doubts then get the 650w version but the 550w would be more than enough.
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Well you've convinced me good. Do you know if OCUK do Saturday delivery?
 
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