GTX670 fine with 530W PSU?

Colombino

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Hi there,

so, basically - I have a GTX 570 that runned just fine on THIS PSU. Soon I'm getting a GTX 670 as a "minor upgrade" (low budget) and I was wondering if the GTX 670 will work fine on the same PSU?

According to nvidia the GTX 670 needs 500W, but on GIGABYTES webpage it says 550W for the same GPU, which confuses me a bit and thats why I'm asking you senpais.
 
Solution
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Nvidia's recommendations are very generalized; it really depends on your hardware. And even "530W PSU" is very generalized.

Anyway, the Thermaltake Smart 530M has never been reviewed. However, the 730M was reviewed and has some high concerns and problems with voltage regulation https://www.techpowerup.com/reviews/Thermaltake/SP-730P/5.html

Whether this is consistent with the 530W unit can only be based on assumption. I wouldn't trust the power supply with heavier loads, though, it's poorer quality most likely.

However, assuming you don't have an FX 9xxx CPU, your max system load should be around 400W with an overclocked system, more like 325W without any overclocking. Gaming load should be in the 200s. Still some things concern me like the transient response of the 730W unit at 50% load, a load you will be at while gaming: https://www.techpowerup.com/reviews/Thermaltake/SP-730P/7.html
 

Colombino

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I'm having a i7 2600 (not 2600k, so not OCed), 2 modules of 4GB DDR3 RAM, 1 HDD and 2 case fans. Nothing but the GPU is OCed. Also, according to http://www.coolermaster.com/power-supply-calculator/ my PC would need 432W under full load. Not sure if this is calculator is reliable at all though...
 


That one overexaggerates, too. And adding 50W doesn't just work like that. There are some PSUs that will have out of spec ripple way below their labelled wattage.
 

Epicness937

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well mostly if its below a tier 3 psu its going to die at 70% wattage
 

Xtergo

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Some even die at 50% xD
 

Epicness937

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exactly if you are going to get a tier 4 psu get a 10000W model to be safe so the psu does not die at 1% load
 

Xtergo

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bJ36Jvj.jpg
 

Colombino

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On his page i got these results for my PC with the GTX 670:

Load Wattage: 382 W
Recommended UPS rating: 750 VA
Recommended PSU Wattage: 432 W

Amperage (combined)
+3.3V +5V +12V
8.9 A 10.2 A 29.3 A
81 W 351 W

What I can say is that i have enough Amps on my +12V rail. So, should I add the 50W on the load wattage or recommended PSU wattage?
 

Epicness937

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personally i would go recomended wattage at minimum but more good psus are more than 500w for example im running a evga p2 850 which is kind of overkill but its a great psu
 
Solution


No. This is the problem with tier lists, you can't start generalizing stuff. Only bottom-rung ones will "die" at 70%. Trying to simplify a very complex thing (power supplies) ends up with generalizations that are incorrect.
 

Xtergo

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Ikr, he was jk