Our load tests leverage a couple of FAST ATE active load testers and a variety of other equipment such as a hotbox, oscilloscope, power conditioner, temperature probe, and a power consumption meter. You can read more about our standard testing approach here.
Our first five tests represent incrementing classes of modern gaming systems with the last test catered to the full spec of the power supply at up to about 1 kW. We measure voltage output at each load, ripple and efficiency. Now, for the Rosewill RP650-2 results:
The Rosewill RP650-2 performed decently during load tests that it will likely encounter as a value oriented product. The 3.3V output did drop off a little too much on test 5 and fell below the minimum ATX specification of 3.14V. Test 5 was well within defined load capacity and should not have posed an issue for the power supply, so the result was disappointing.
The biggest failure, however, was Test 6 at full load during both the ambient and hotbox tests. The power supply was fully loaded up to the claimed specification on the label and it failed on both accounts. It did not power up in the hotbox at all and ran for only a few minutes at ambient temperature. This makes me suspect that the marketing department simply wanted this to be a 650 Watt power supply and stretched the power ratings a little.
The power supply may have run perfectly at the 611.5 Watts the reference power supply was designed to handle instead of the claimed 631.5 Watts from Rosewill, but we will never know. We run all of our test samples at the manufacturer claimed specification and if the power supply fails because the numbers were exaggerated, then we simply note the failure.
In the end, it appears there is a difference between the Rosewill and the likes of Corsair, Silverstone and PC Power and Cooling, after all. Premium brands are traditionally conservative in their power delivery ratings which help them deliver better load results than their value oriented compatriots. Pushing the claimed power specification beyond what the unit was designed for in order to get the rating up to a nice round number may have failed this power supply. Sometimes, wanting a bigger number on the box is just not a good idea.
So, what about efficiency? - Well, the Rosewill RP650-2 is not 80 Plus certified, but the reference power supply the Rosewill is based on is certified. I am not sure why Rosewill chose to stretch the claimed power output to 650 Watts and forego the 80 Plus claim. Efficiency results in all completed load tests do indicate that the power supply is more than capable in this area.
PRICING: You can find products similar to this one for sale below.
United States: Find other tech and computer products like this over at Amazon's website.
United Kingdom: Find other tech and computer products like this over at Amazon UK's website.
Canada: Find other tech and computer products like this over at Amazon Canada's website.
- Page 1 [Introduction]
- Page 2 [Specifications]
- Page 3 [The Package]
- Page 4 [In the Box]
- Page 5 [The Power Supply]
- We at TweakTown openly invite the companies who provide us with review samples / who are mentioned or discussed to express their opinion of our content. If any company representative wishes to respond, we will publish the response here.
Latest News Posts
- SEGA is racing to victory
- Vertu launches a $360,000 priced feature phone
- Far Cry 5's world evolves based on your decisions
- OnePlus Confirms: OnePlus 3T is being discontinued
- Final Fantasy VII Remake coming in 'next 2 to 3 years'
- m4a88td-m/usb3 & Windows 10
- OWC ThunderBay 4 Mini Thunderbolt 2 Review
- Free Paypal Money Adder Online Tool Legit 2017
- Prey benchmarked: Radeon RX 580 vs. GeForce GTX 1060
- ADATA AI910 Lightning Card Reader Plus Review
- Qualcomm fuels IoT growth by currently delivering more than 1 million chips a day into a wide range of connected applications
- Team Group announces theme for COMPUTEX 2017 showcase: go beyond the limit and reach for the top
- SAPPHIRE announces PULSE Radeon RX 560 graphics card
- ELITEGROUP computer to stand out at Computex for its smart campus deployment, robotic technology, education laptops, tablets, mini PC, and motherboards
- ADATA Shares a Symphony of Technology at Computex 2017