Transient Response
Transient response in power supplies refers to how quickly and effectively the PSU stabilises its output voltage during sudden changes in load demand, such as when a CPU or GPU increases its power draw. It’s measured by the time and voltage deviation during these shifts. A faster, smaller transient response ensures stable power, preventing instability and component damage.
20% Load – 20ms
| Advanced Transient Response 20% - 50 Hz - No Caps | ||||
| Voltage | Before | After | Change | Pass/Fail |
| 12V | 11.963V | 11.860V | 0.87% | Pass |
| 5V | 4.968V | 4.891V | 1.55% | Pass |
| 3.3V | 3.305V | 3.186V | 3.59% | Pass |
| 5VSB | 5.045V | 5.010V | 0.69% | Pass |
50% Load -20ms
| Advanced Transient Response 50% - 50 Hz - No Caps | ||||
| Voltage | Before | After | Change | Pass/Fail |
| 12V | 11.947V | 11.844V | 0.86% | Pass |
| 5V | 4.963V | 4.864V | 1.99% | Pass |
| 3.3V | 3.300V | 3.175V | 3.79% | Pass |
| 5VSB | 5.027V | 4.984V | 0.86% | Pass |
The transient response with normal loads is good at 12V and 5V. At 3.3V, the deviation is low, but because the initial voltage is low, this rail’s voltage drops below 3.2V when a transient load is applied.
Transient Response ATX v3.1 Tests
[Note] For PSUs without a 12+4 pin connector, the maximum applied load for the transient response tests is 150%, rather than 200%.
The PSU passes all ATX v3.1 transient response tests.
The 12V rail’s performance is average.
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I would love to see the FSP Mega Ti next up 🙏
Waiting ages for a good honest review.
will try to do it at some time. Sorry being over my head with other things lately.
hello Aris did this PSU legit certified by cybenetics ? https://vsptech.vn/bo-nguon-sfx-vsp-vgf850-cybenetics-gold-850w-atx31-pci-e51-fully-modular.html
i also asking how about this product, did this also had same legit cybenetics certificate https://www.kissquiet.com.tw/copy_productdetail_162651.html?pid=5889399&_t=1761816168
You always praised Corsair for fan failure protection yet with this new shift line they don’t have it anymore you say. Also other protections are not to your liking either. I dislike Corsair because how they treat things so if there is a similar alternative then i chose that.
I think the Pure Power 13 M is a good alternative based on your test and a newly released Dark Power 14 too which also performed well in your tests just no review up yet.
Your test method for Inrush current is different now as you noted, the numbers are different, what threshold would you call good result?
Most PSUs nowadays still don’t have fan failure protection, I am afraid. This is why I am pushing so much through reviews to force them to implement it.
Below 100A is generally considered safe/ok.