500W Enough for GTX 1050 Ti

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Todor Stefanov

Todor Stefanov

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Mar 13, 2015
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Hello guys.

This is my PC right now:

CPU: AMD A8-6600K 3.9Ghz
Memory: Kingston 1333mghz 12GB
GPU: Nvidia GTX 650-E 1GB GDDR5
PSU: 400W (came with the case)

So my question is, if i upgrade my GTX 650 to a GTX 1050 Ti which consumption is around 10-15W more than the GTX 650, should i buy a better PSU ? (I don't really want to give money for another PSU because i really don't have that much money for upgrade so if i can stay like that please tell me).
 
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boosted1g

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Jun 12, 2013
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Everyone is getting way ahead of themselves here.

400w PSU that came with the case sounds very concerning.

PSUs are not created equal. A good 400w psu can actually provide 400w of stable power. A crap 400w psu will be unstable as all can be outputing 200w of power and will then fry your new GPU when it dies.

So before just assuming that your PSU can even remotely can power a 1050ti properly, need to know what the actual make and model is of your PSU.
Not saying every "included with my case" PSU is bad, just 95% of them.
 
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Flyfisherman

Flyfisherman

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May 29, 2012
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PSUs are not created equal. A good 400w psu can actually provide 400w of stable power. A crap 400w psu will be unstable as all can be outputing 200w of power and will then fry your new GPU when it dies.
Click to expand...

Ok, I'm with You half way, but when you say "it fry your new GPU when it dies".
How exactly does that work?
Do you mean a voltage spike for a couple of ms? Because that is the only thing I could think of that could destroy a graphics card (not fry), from this scenario.
And frankly, I have never heard or had experience with spikes when a power supply goes to bed permanently.

Best regards from Sweden :heink:

 
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boosted1g

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http://www.tomshardware.com/reviews/power-supplies-101,4193-21.html
Voltage is the main issue, current (amps) is another, as well as bad grounds. Low voltage can even cause failure as well. If your VRMs in your motherboad and GPU get too low of voltage they will compensate by increasing amps (which also increases heat); at best it wears the part out more rapildy, at worst ...poof.
 
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Flyfisherman

Flyfisherman

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On the motherboard VRMs (voltage regulator modules) are a specific class of MOSFETs.
They operate in a certain span and it is almost impossible for those to "go bad" due to to low voltage. They don't work that way.
Those are today quite sophisticated and also have current mode control, which means they shut off when the current draw is beyond its limits.
Low voltage will not destroy these, unless some new information is available that I 'm not aware off.

On both the motherboard as well on a modern graphics card; there are also voltage overshoot protection (OP) controlled by error amplifier circuitry.

If I search the forum and get all the hundreds of threads you are speaking off; how many of these are actually true and genuine that the root cause of the broken GPU card actually was done by a PSU which dropped the voltage and died?

Best regards from Sweden
 
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boosted1g

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I meant there are hundreds of threads of low quality psu's frying components, not specifically under voltage causing failures.

You seem to have more detailed knowledge of the VRMs then I. Heat is the enemy though of VRMs and rasing current to compensate for voltage will cause additional heat which if we are dealing with cheaper board with lower quality VRMs (like in many budget AMD boards) then that heat will take its toll.
 
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Flyfisherman

Flyfisherman

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Yes I agree. That is also the reason why Asus (among others) on their more expensive motherboards in the ROG series has these Japanese high quality capacitors and vrm:s.

Of course the same logic goes with a low quality PSU where you might find an unsteady 5V, 12V etc. with a lots of ripples.
That means in the long turn it will wear out the circuitry on the other end who tries to control it. It will also cause more heat because of it and heat is no good for any electronics, as we all know.

So Yes, I agree that a cheap, poor PSU is a bad choice for a new build.
Best regards from Sweden :p

Ps. I'm sorry for my poor english and grammar.
 
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