Is my psu enough for 7750?

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R

renec

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Jul 11, 2013
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Hi, so yesterday I bought a new gpu - a 7750 to replace my old 8600gt, it performs great but there's a bit of a burnt wire smell coming from my pc, I've had that before, usually my psu would break down and I'd have it replaced, I'm running a no-brand 300w, it says it has 18A@5V and 14A@12V, I did some research before buying my card and it stated that a 300w psu would just cover it, moreover I used a few psu calcs and the amount I required for my old 8600gt was the same for the hd 7750 - 216w. So I want to ask you guys - is my psu enough for the card?
 
Solution
JRAtk94
When stating required wattage, it is always assumed that you're using at least a branded PSU, which is of at least mediocre quality.

The fact that it only has 14A@12V is worrying. That is unbelievably sub-par. For comparison, my PSU has 53A@12V.

I think the problem lies with the fact that the rail is extremely underpowered, most likely due to it's unbranded origin.

It's an extremely poor quality PSU, and should be replaced ASAP.
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When stating required wattage, it is always assumed that you're using at least a branded PSU, which is of at least mediocre quality.

The fact that it only has 14A@12V is worrying. That is unbelievably sub-par. For comparison, my PSU has 53A@12V.

I think the problem lies with the fact that the rail is extremely underpowered, most likely due to it's unbranded origin.

It's an extremely poor quality PSU, and should be replaced ASAP.
 
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Solution


no, I wouldn't' chance it. 7750 needs a 400w supply. Now with the card in, your system most likely will never touch 400w usage or even get near it. But if you have a no brand PSU chances are it doesn't supply power as it's rated. Those PSUs generally crap out under duress.
Get a decent brand maybe Corsair CX450 or something around the same wattage from seasonic, and you won't look back. If you stick with crappy PSU you could do more damage to other components too.
 
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Well then why does it have a certificate, I thought that's why they had them to configure which psu is good, not all of seasonic's, corsair's or xfx's psus are certified
 
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I disagree.

That PSU (and any others like it) has nowhere near enough Amps on the 12v rail to support a 7750 as well as the CPU.

I agree with the last part though 😛
 
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80+ is a certificate of efficiency, not quality.

They are not the same thing at all.
 
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That one is better, but still not great.

The VS series is the absolute bottom of the Corsair line - I personally wouldn't recommend one.

It'll be fine for your current PC, but it's not allowing you much room for future upgrades.
 
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I'll live with that, not planning on anything, the 7750 would suffice for my 17` monitor just fine for a couple of years perhaps :) Thank you for your dedication for my problem, have a nice day :)
 
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I was not aware of this - do you have any idea why have they mixed a budget-level and mid-range series prefix? This could cause some serious confusion on the consumer end.
 
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