Is the high OCP limit on the 5v rail a cause for concern?
Is the high OCP limit on the 5v rail a cause for concern?
I just purchased this PSU, the offer was really attractive. There isn’t much information available about Sama power supplies, but I found a review here (which needs to be translated from Chinese). The review is generally positive, though it notes that the OCP limit on the 5V rail is quite high—around 220% of the 20A rating. Is this a warning sign? From what I know, the 5V rail isn’t used as much as the 12V rail. Would there be a significant chance that components would exceed this limit and cause damage before the OCP reaches such a high level?
It really is too good to be true. 60 bucks for 850W ATX 3.0 PSU - doesn't happen. Unless you get a crap, which you did.
The PSU you have, is: Inter-Tech SAMA XPH-850A.
Here are the official specs of the black version:
https://www.inter-tech.de/5261/XPH-850A-EN.html
There are so many red flags, that i'm not going to even count them all. But to point out some;
* WAY too cheap price for 850W ATX 3.0 PSU. Double the price and then we can talk about good quality PSUs.
* No actual efficiency rating. The marketing image on the Egg has so many flaws. What is "80PLUS White Gold Certification"? There is no such thing. Image shows 80+ Platinum. Text just beside it is mixture between 80+ White and 80+ Gold.
* Official specs say that the black version has 5 years of warranty. Paint the PSU white and it magically gains another 5 years of warranty, to 10 years as said by the marketing in the Egg? Doesn't happen.
* Chinese, non-reputable review is of the black unit. It is completely unknown if the white unit even has the same innards as black one has. It does look similar on the outside, but this is not sufficient enough.
* Inter-Tech is known to make crap quality PSUs. So, i don't think that your cheap white unit would be any different. It is a nice paperweight though.
Since PSU powers everything, it is
the most important component
inside the PC.
With this: NEVER cheap out on PSU! (Which you did.) Also, never buy used PSU either.
You can cheap out on every component inside the PC,
except
PSU.
So, go out and get a good quality unit this time around.
You can start here:
https://hwbusters.com/best_picks/best-at...busters/4/
All SATA drives are using 5V. And so are all USB ports and network ports. So, 5V rail is as important as 12V rail.
12V is used by: CPU, GPU and MoBo (e.g case fans).
3.3V rail is the one that is almost obsolete now. Used to be where RAM and FDD used 3.3V but RAM power is now converted from 12V by MoBo and no-one uses FDD anymore.