Page 1:Brought To You By Granny’s Radio
Page 2:How A Switching Power Supply Works
Page 3:Efficiency, Efficiency, Efficiency!
Page 4:Of Power Factors, Apparent Power, And Effective Power
Page 5:How To Spot An Efficient PSU?
Page 6:Don't Get Burned: Safely Before Stinginess
Page 7:How To Determine Your Power Requirements
Page 8:The Power Window Is Important
Page 9:Example 1: The Office PC
Page 10:Example 2: Mid-Range Gaming PC
Page 11:Example 3: The Enthusiast’s System
Page 12:If You Don't Like Our Advice, Buy A Fire Extinguisher
Example 3: The Enthusiast’s System
Test Case 3: The Enthusiast’s PC
And now for our high-end configuration
|CPU||Intel Core i5-2500K @ 4.5 GHz|
|RAM||2 x 4 GB DDR3 Kingston HyperX|
|Graphics||Gainward GeForce GTX 580|
|Hard Drive||1 x 1 TB Western Digital Caviar Blue|
|Optical Drive||DVD burner|
|External Devices||USB hard drives, mouse, keyboard|
|Power Draw, Idle||72 W|
|Power Draw, Normal Load||148 W|
|Power Draw, Full Load||488 W|
This time around, we choose from the following candidates:
|Super Flower||Golden Green 450 W||80 PLUS Gold||$83 (€59.00)|
|Raptoxx||RT 600 SPL||None||$88 (€62.00)|
|Aerocool||VT12XT 600 W||80 PLUS Bronze||$115 (€82.00)|
|Enermax||Modu 82+ II ErP 525 W||80 PLUS Bronze||$145 (€102.00)|
|Corsair||AX 750||80 PLUS Gold||$198 (€140.00)|
A Big System Draws Big Power
We fire up our watt meter one last time, and this time, all of our PSUs survived. We purposely chose a wide spread of models for this scenario, both where price and power are concerned. Here are the results of this mixed batch of power supplies:
Again, we purposely pushed some of our candidates to their limit, and even beyond. The Super Flower model, nominally rated at 450 W, remained surprisingly stable throughout. Indeed, it acted more like a solid 500 W model, albeit one close to its limit.
With the system idling, the brawny Corsair AX 750 is at a bit of a disadvantage compared to the other contenders. However, as the system’s power consumption rises, so does this model’s efficiency. The Enermax Modu 82+ II ErP 525 W has no real strengths or weaknesses and ends up in the middle of the pack. It is pleasantly quiet, though. The same holds true for Corsair, by the way, which combines low noise with the highest power reserves in this group. It’s definitely not cheap, but it’s a very good entry.
Raptoxx, on the other hand, is cheap and does decently enough, if you can stand its noise level. While the extra 15 to 20 W it tends to consume compared to its competitors add up over time, none of the more expensive models would amortize their higher price through power savings. Aerocool’s VT12XT 600 W is pricier than Raptoxx‘ entry, but also quieter and a little more frugal when it comes to power use. Once more, you are unlikely to be able to recoup the higher price compared to the Raptoxx due to its lower power consumption.
- Brought To You By Granny’s Radio
- How A Switching Power Supply Works
- Efficiency, Efficiency, Efficiency!
- Of Power Factors, Apparent Power, And Effective Power
- How To Spot An Efficient PSU?
- Don't Get Burned: Safely Before Stinginess
- How To Determine Your Power Requirements
- The Power Window Is Important
- Example 1: The Office PC
- Example 2: Mid-Range Gaming PC
- Example 3: The Enthusiast’s System
- If You Don't Like Our Advice, Buy A Fire Extinguisher