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]
Recommended for You
- 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
- New Note8 leak shows awkwardly placed fingerprint sensor
- Samsung Galaxy S8 officially discounted by up to $300
- Qualcomm's Snapdragon 836 will debut with the Pixel 2
- Samsung to produce chips for the iPhone 9, LG batteries
- Facebook is working on a modular smartphone
- Bloody AL90 Blazing Laser Gaming Mouse Review
- Cryptocurrency mining deflates, used GPUs hit eBay
- G.SKILL TridentZ RGB DDR4-3600 32GB Memory Kit Review
- ASRock X299 Taichi Motherboard Review
- Transcend ESD220C 120GB Portable SSD Review
- Atari announces Blade Runner 2049 partnership with NECA and Audiowear, launching wearable technology that blurs the line between fashion and future
- BIOSTAR introduces the world's first 8-slot PCI-e mining motherboard with the TB250-BTC+
- HyperX unveils HyperX Alloy Elite and TKL HyperX Alloy FPS Pro mechanical gaming keyboards
- Toshiba Memory Corporation develops world's first 3D flash memory with TSV technology
- ADATA releases XPG GAMMIX line with S10 PCIe Gen3x4 NVMe 1.2 SSD and D10 DDR4