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JonnyGuru talks about power supplies

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I found this to be very informative. I wish that everyone would watch this before posting a question about PSU's.

 
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One of the rare no bullcrap tech video channels.

Good video indeed.
 
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That was nice.
 
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Well, I have to say, if folks would just look through the advice given on this site, they would learn everything presented in that video. I didn't learn anything new but it was nice to see everything presented in one video. It was also nice to see it didn't turn out to be a long video advertisement for Corsair supplies.

So I agree with Ferrum Master - it was a good video.

One thing I was happy to hear was that buying a top tier 80-PLUS certified PSU (Platinum, Titanium or Unobtainium ;) ) is not really worth the extra cost as the savings in energy costs just don't add up to the extra purchase price (see around 1:35 in the video). This is why I have always recommended no higher than Gold.

The one thing I didn't like hearing (and again, it was not anything new) was the fact to get some of the fancier features (braided cables for example) you have to buy the upper tier and higher capacity 80-PLUS supplies. Oh well. That "value added" feature is pretty standard across many industries.
 
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Honk if your PSU is over-kill!! lol.
I probably don't need a 850 watt power supply.

The EVGA replaced a Corsair CX650M.
 
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This is probably one of THE best videos I've seen yet. Thank you for sharing this.

Loved it.

Honk if your PSU is over-kill!! lol.

Xm2 1250 SS
 
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Of course you didn't.
Not sure if meant to be snarky or not, but as a tech, I've been working with PSUs for over 45 years. In terms of electronics technologies, AC to DC switching PSU have not changed much in years. So yeah, he said nothing new so there was nothing new for me to learn. You can certainly search through my posts on this site and see for yourself. The only thing you won't see is me talking about SFF PSUs because I don't think I have on this site before.

But as I said above, it was still a good video as it put all in one place without sounding like a infomercial.

What did you learn that you never knew before, Mr. Scott? In fact, I'd be curious know what any of the experienced regular posters here learned new. I bet not much, if anything.
 
D

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I'm in love! :love:
Give me over-kill + quality and have me a forever PSU!

It may have taught the average users their cheapy 500w PSU may not cut it long with the Radeon VII at 300w power draw.
At least that's what gathered from the video.

Not necessary to over-kill if building system without foreseeable changes to what your purchase calculation was.
But since a PSU can least 10 years (many with 10 year warranty-usually high end) you kind of want to overcompensate just in case NVidia releases some monster dual Gpu card you gotta just get your hands on lol. ya ya good point good point.
Hhmm, maybe 550w is too small.
What say? Call that 750w on the table an industry standard??
Nah, that will just drive up market prices. Let the suckers purchase low end cheap PSUs.
lol omg. Awesome video.

Go get that 750w you've dreamed of. Your 2080ti deserves it. pwahaa.
 
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This is probably one of THE best videos I've seen yet. Thank you for sharing this.

Loved it.

Honk if your PSU is over-kill!! lol.
HoooooonK!!!!!!!
Running a 1600W in this daily build...... :D
 
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This is probably one of THE best videos I've seen yet. Thank you for sharing this.

Loved it.

Honk if your PSU is over-kill!! lol.

Also honking here.

650W is definitely overkill for my stock 1600x and undervolted RX 570.
When I built my new system in 2018 I did not buy a new PSU cause I still had a fairly new 450W Thermaltake 'cheapo' and with a GTX 950 it was more than enough,the RX 570 upgrade was kind of unexpected so I was stuck with that PSU for a while.
Sure it could handle the 570 but the fan noise under gaming load was way too loud for my taste.

So I bought a 650W Gold PSU this year to avoid such scenario happening again and to make sure the fan stays quiet.:)

Video was nice and informative,for me at least.
 
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I would to see this guy here on TPU for a day or two. Questions & Answers. This way I can mod the s**t out of my PSU (upgraded components).
 
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Honk if your PSU is over-kill!! lol.

I7 6700K @ 4.3GHz + MSI RTX2070 Super Gaming X Trio.
650 Watts PSU recommended with this GPU but I use a Seasonic 750 Watts.
 
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Benchmark Scores Faster than yours... I'd bet on it. :)
Nice! A good video for the greenhorns, that is for sure!

RE: overprovisioning... it's funny because he says its not really needed and a waste of money if you know your wattage....flat efficiency curves, etc. Something those in know have been preaching for years (which falls on deaf ears...I replied to two threads this morning, in fact - my avatar just feels so apt for this place, lol). "Not a bad idea, just not an economical one".

Ya'll keep honkin' tho!
 
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D

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You get a like (upvote) 1600w PSU because I think you have too much, but I love lots of power. ...any photo

Daily here 1200w, too much, but I want more.

FSP Group 2000w 18 sets of PCI-E connectors and 166 amp 12v rail. That's what you need!! :D
 
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Thats my PSU they're talking about in the beginning, and I use it in my ATX build with custom cables and the adapter bracket like he said...

I still like using the CX650w modular in my budget/ws builds - been doing it for years without any problems at all... lots of features from the more expensive models.
 
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QUESTION: Has anyone powered their GPU or CPU on a separate PSU from motherboard?
Since both the GPU and CPU get their power (or at least some of it for some GPUs) through the motherboard, it is not possible to power them with a 2nd PSU. But I have used 2 PSUs before, the second to power drives and fans. But this is not recommended because no two PSUs provide the exact same output voltages and avoiding any "differences in potentials" and differences in grounds, and grounding to Earth ground is essential and challenging.
 
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Since both the GPU and CPU get their power (or at least some of it for some GPUs) through the motherboard, it is not possible to power them with a 2nd PSU. But I have used 2 PSUs before, the second to power drives and fans. But this is not recommended because no two PSUs provide the exact same output voltages and avoiding any "differences in potentials" and differences in grounds, and grounding to Earth ground is essential and challenging.

That's not true. I just did it in a cpu swap where a donor machine was powering the GPU since the spare PSU I had didn't have the appropriate connectors.

You can absolutely power the motherboard and the GPU on different supplies. You can even run them while they're running different systems.
136097


The red donor machine is powering the GPU, while the rest of the mobo and CPU and waterloop is being powered by a 500w spare PSU.
 
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The graphics card is still getting up to 75W through the PCIe slot. That's why I specifically said "some of it for some GPUs".
 
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The graphics card is still getting up to 75W through the PCIe slot. That's why I specifically said "some of it for some GPUs".

How does that make it "Impossible to run on a separate PSU".

You can even cross wire the 24 pin and the 8 pins on different supplies. Totally possible.

They even used to make bay psus for vga setups back when bays were still a thing:
136099
 
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Well, I have to say, if folks would just look through the advice given on this site, they would learn everything presented in that video. I didn't learn anything new but it was nice to see everything presented in one video. It was also nice to see it didn't turn out to be a long video advertisement for Corsair supplies.

So I agree with Ferrum Master - it was a good video.

One thing I was happy to hear was that buying a top tier 80-PLUS certified PSU (Platinum, Titanium or Unobtainium ;) ) is not really worth the extra cost as the savings in energy costs just don't add up to the extra purchase price (see around 1:35 in the video). This is why I have always recommended no higher than Gold.

The one thing I didn't like hearing (and again, it was not anything new) was the fact to get some of the fancier features (braided cables for example) you have to buy the upper tier and higher capacity 80-PLUS supplies. Oh well. That "value added" feature is pretty standard across many industries.


my fav quote.. "we could only do 750w if it was platinum if we did gold it would run to hot." So it sure sounds like gold is not recommended by him for that size psu?..

its also extremely amusing you "didnt like hearing platinum had better features" (and parts! he stated it requires better caps to provide better efficiency which leads to better ripple and higher operating temp specs etc)

so what i take home from this is that 750w plat that i run are indeed not even overkill and that when running a psu more than a few years its actually a good idea. Less upgrades and parts purchased better for the earth in many ways.
"sweet spot 650w...fan hardly ever runs"
 
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