Opinion on this PSU?

[Red™]

My friend recently got his PC. Unfortunately he isn’t much of a tech savvy.
He bought a somewhat funky psu and I don’t trust it. He’s having weird problem, like his computer would crash, sometime it’ll either freeze or black.
https://media.discordapp.net/attachments/466040954307215361/672220978624987187/20191014_160329.jpg

[xSOSxHawkens]

Publicado originalmente por Out Of Bubblegum:

Publicado originalmente por xSOSxHawkens:

I disagree with what I think you are saying. Take two 600 watt power supplies. One tier A and one D. They both will power the PC. But the quality of the D is bad. It will deliver unstable power and if it goes bad it can fry everything. That is why you buy an A. For the extra safety. Never say a D is good enough. imho

Also, A 750w PS will not use more power than a 600w. If they are the same efficiency rating. Like 80+ gold. The 750 CAN deliver more power reliably than the 600. If the PC needs the more power. They will both use only the power that the PC needs. They will both use the same power in operation.

You almost got what I am saying...

What I am saying is this...

You have two 700w PSU, one Td one Ta.

Test system 1 is a machine that has a sustained load of 600-650w. In this machine the 700W Ta will not only work, but will be required, as the sustained load is very near the PSU limit, and thje componants will be stressed under the load regularly posing a risk of failure. In this same system the Td PSU will likely work some times, but will probably choke on ocasional current spikes causing system reboots. If the Td *can* sustain the system under load then it will be highly stressed while doing it, produce higher heat from its lower effeciency, and likely have an internal parts failure sooner.

With *any* psu of any tier a failure does often lead to other parts getting killed. In Test System 1 there is no arguement, the Td PSU must be avoided.

Now lets look at Test System 2:

TS2 has a peak sustained load of ~400w, with normal loads in the 350-380w range. In this system, a good quality Ta 400-450w PSU could be used. Alternatively, you could opt for a higher powered, but still *ok* (read not bottom of the barell E tier) PSU. Notice the definign difference in that list between E and D is always unsafe to use (E) and sometimes unsafe to use (D). That definition is for a reason. In TS2 a Td 700w *could* be used without issue, as the parts inside, though not top end, are more than enough to provide the power requested without being stressed much beyond half way. They wont get as hot, they wont risk failure as bad, and as long as they are good enough not to blow up they will be fine. Thats why Te exists, they have parts you *cannot* trust at all, where Td has parts you can trust for basic loads but shouldnt trust long under sustained maximums.

TS1 demonstrates the example where Td is unsafe, TS2 (OP's system) in an example of where it should be just fine.

If he does get it fixed with a new PSU he needs to warranty this one in, as the system in question can only draw ~60% of the load the PSU should be able to output.

[Wampum Biskit]

Publicado originalmente por xSOSxHawkens:

There is reasonable arument to be made about effeciency in 800-1kw builds though....

good PSU's noways have a flat efficiency curve meaning no matter if you draw 200 or 800 watt out of a 1K PSU the efficiency is nearly the same to the point that we are talking such minute difference in power usages it's not worth mentioning.

old style PSU's used to have a parabolic efficiency curve where the efficiency was the highest near a certain load % , but with the new designs this is no longer an issue.

so even buying a 1K PSU for a 500W , is just over kill , it won't cost you any more money on your powerbill , even if it is , we are literally talking pennies per year. they just cost more to purchase.

[xSOSxHawkens]

Publicado originalmente por Wampum Biskit:

Publicado originalmente por xSOSxHawkens:

There is reasonable arument to be made about effeciency in 800-1kw builds though....

good PSU's noways have a flat efficiency curve meaning no matter if you draw 200 or 800 watt out of a 1K PSU the efficiency is nearly the same to the point that we are talking such minute difference in power usages it's not worth mentioning.

old style PSU's used to have a parabolic efficiency curve where the efficiency was the highest near a certain load % , but with the new designs this is no longer an issue.

so even buying a 1K PSU for a 500W , is just over kill , it won't cost you any more money on your powerbill , even if it is , we are literally talking pennies per year. they just cost more to purchase.

Not the argument I was making. But yes, you are right ont he curves.

I was saying there is an arguemnt to be made going to *higher* effeciency at 800-1kw builds (that need that psu) as the higher effeciency at that high of a draw makes a difference in actual cost vs a 300w load/draw.

[Napoleonic S]

Publicado originalmente por Squirrell:

Stick to a tier A if he's having problems.

https://linustechtips.com/main/topic/1116640-psu-tier-list-40/

The usual reason why tier D etc are to be avoided is that the power output is not within tolerance for gpus.

Who made that list? I prefer referring to jonnyguru and here's the thing

According to that LTT thread, Bitfenix PSU are better than the seasonic ones, LMAO, who ranked that ♥♥♥♥? Here's actual reviews from jonnyguru regarding Bitfenix PSUs and a Seasonic one from the same class of PSU (wattage and efficiency, not referring to the LTT classification)

Bitfenix

http://www.jonnyguru.com/blog/2017/11/20/bitfenix-formula-gold-750w-power-supply/6/

http://www.jonnyguru.com/blog/2017/01/23/bitfenix-whisper-m-750w-power-supply/6/

Now here's the seasonic one

http://www.jonnyguru.com/blog/2017/07/10/seasonic-focus-plus-750-gold-750w-power-supply/6/

The seasonic one is superior than the Bitfenix ones.

[Out Of Bubblegum]

Publicado originalmente por Napoleonic S:

Who made that list?

That's the 64,000 dollar question. Who can you trust? Major web sites can be paid to run an "advertisement" review. A bunch of geeks may just think they know something. You form an opinion about some place. But there is now way to verify your opinion.

It does seem that the Seasonic brand is good.

[Napoleonic S]

Publicado originalmente por Out Of Bubblegum:

Publicado originalmente por Napoleonic S:

Who made that list?

That's the 64,000 dollar question. Who can you trust? Major web sites can be paid to run an "advertisement" review. A bunch of geeks may just think they know something. You form an opinion about some place. But there is now way to verify your opinion.

It does seem that the Seasonic brand is good.

At least Jonnyguru is a well known and well respected entity in the actual PSU industry.

[Wampum Biskit]

Publicado originalmente por xSOSxHawkens:

Publicado originalmente por Wampum Biskit:

good PSU's noways have a flat efficiency curve meaning no matter if you draw 200 or 800 watt out of a 1K PSU the efficiency is nearly the same to the point that we are talking such minute difference in power usages it's not worth mentioning.

old style PSU's used to have a parabolic efficiency curve where the efficiency was the highest near a certain load % , but with the new designs this is no longer an issue.

so even buying a 1K PSU for a 500W , is just over kill , it won't cost you any more money on your powerbill , even if it is , we are literally talking pennies per year. they just cost more to purchase.

Not the argument I was making. But yes, you are right ont he curves.

I was saying there is an arguemnt to be made going to *higher* effeciency at 800-1kw builds (that need that psu) as the higher effeciency at that high of a draw makes a difference in actual cost vs a 300w load/draw.

oh sure, since efficiency is rated in % ,

the higher % the efficiency rating the lower the loss at highers draws.

[Squirrell]

Publicado originalmente por Napoleonic S:

Publicado originalmente por Out Of Bubblegum:

That's the 64,000 dollar question. Who can you trust? Major web sites can be paid to run an "advertisement" review. A bunch of geeks may just think they know something. You form an opinion about some place. But there is now way to verify your opinion.

It does seem that the Seasonic brand is good.

At least Jonnyguru is a well known and well respected entity in the actual PSU industry.

And Jon Fu isn't ....... rofl.

[Ralf]

Publicado originalmente por Napoleonic S:

Who made that list? I prefer referring to jonnyguru and here's the thing

According to that LTT thread, Bitfenix PSU are better than the seasonic ones, LMAO, who ranked that ♥♥♥♥?

Tier A+ Bitfenix is made by CWT and are multirail just like the RMi/HXi, that why they got the + and are 'better'.
The problem with the older topologies(any psu using ten-years old topologies, like the great Seasonic S12II, M12II) is that the modern graphics cards, they have such high loads so fast that the older topologies can't keep up and they just crash or make loud noises when they're in games or benchmarks and stuff because it can't handle it. And since they are group regulated, the voltages can go out of spec. The Focus FM - Focus Plus FX are on D cuz they restart with Vega.

[Napoleonic S]

Publicado originalmente por Ralf:

Publicado originalmente por Napoleonic S:

Who made that list? I prefer referring to jonnyguru and here's the thing

According to that LTT thread, Bitfenix PSU are better than the seasonic ones, LMAO, who ranked that ♥♥♥♥?

Tier A+ Bitfenix is made by CWT and are multirail just like the RMi/HXi, that why they got the + and are 'better'.
The problem with the older topologies(any psu using ten-years old topologies, like the great Seasonic S12II, M12II) is that the modern graphics cards, they have such high loads so fast that the older topologies can't keep up and they just crash or make loud noises when they're in games or benchmarks and stuff because it can't handle it. And since they are group regulated, the voltages can go out of spec. The Focus FM - Focus Plus FX are on D cuz they restart with Vega.

Multi vs single rail thing is an old myth.

[xSOSxHawkens]

Publicado originalmente por Ralf:

Publicado originalmente por Napoleonic S:

Who made that list? I prefer referring to jonnyguru and here's the thing

According to that LTT thread, Bitfenix PSU are better than the seasonic ones, LMAO, who ranked that ♥♥♥♥?

Tier A+ Bitfenix is made by CWT and are multirail just like the RMi/HXi, that why they got the + and are 'better'.
The problem with the older topologies(any psu using ten-years old topologies, like the great Seasonic S12II, M12II) is that the modern graphics cards, they have such high loads so fast that the older topologies can't keep up and they just crash or make loud noises when they're in games or benchmarks and stuff because it can't handle it. And since they are group regulated, the voltages can go out of spec. The Focus FM - Focus Plus FX are on D cuz they restart with Vega.

Yeh, I had the crashing on Vega.

Found a source saying vegas can pull upwards of 50-60amp per card on the 12v rail, with power spikes into the 600W range for microseconds and sustainted loads in the 330w+...

Tripped my 700w 80+ Bronze PSU in the same ways as the seasonics and others were being tripped, despite the PSU having already powered a heavily OC'd 4790k with an HD7870, GTX-640, and GTX-960.

New PSU has never given me a problem ;)

Publicado originalmente por Napoleonic S:

Publicado originalmente por Ralf:

Tier A+ Bitfenix is made by CWT and are multirail just like the RMi/HXi, that why they got the + and are 'better'.
The problem with the older topologies(any psu using ten-years old topologies, like the great Seasonic S12II, M12II) is that the modern graphics cards, they have such high loads so fast that the older topologies can't keep up and they just crash or make loud noises when they're in games or benchmarks and stuff because it can't handle it. And since they are group regulated, the voltages can go out of spec. The Focus FM - Focus Plus FX are on D cuz they restart with Vega.

Multi vs single rail thing is an old myth.

Back in the day, sure, but I am pretty sure that the upper end units now actualy use a true seperated multi-rail design, but I could be wrong.



On a side note @OP, you might check here to read some of the statements from people who *are* getting PSU failres. Read about what happens. You will notice that most all of them speak of hard reboots and shut downs when OCP (over current protection) is getting tripped.

No one speaks of a BSOD or driver crash, as those things cannot happen if the PSU outright fails or OCP's as the system loses power...

https://www.reddit.com/r/Amd/comments/9zd1os/seasonic_updated_statement_after_the/

Again, just trying to save you are ur friend the cash/trouble if the PSU might not actually be at fault...