Question Will my chinese 650w psu be enough for hd 7970?

Jun 23, 2021
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3
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So i just bought the MSI HD 7970 Twin frozrlll. And I was thinking if my old PSU would work or not.BTW that PSU is from an unknown Chinese brand so do you guys think it would work?

My system:
Cpu: Core i3 6100
Ram: 2 sticks of 8 gb of ram DDR4 (16gb)
SSD: 128 gb
2 HDD: 2tb and 1 tb
PSU: arrow 650w
Mobo: h110m giga
Specification:
  • 24 pin connector for the motherboard
  • 6 pin for the Gpu( yes I'm buying an adapter 6 Pin to 2 X 8 Pin(6+2)
  • 8(4+4) pin for the cpu
And the rest is for my HDD and SSD

Heres the label of my power supply


 

jay32267

Glorious
It may work but I wouldn't do it.

yes I'm buying an adapter 6 Pin to 2 X 8 Pin(6+2)<<<potentially a problem

...but more importantly I wouldn't trust any components I valued with it.

I've had power supplies take out complete systems.
 

lordmogul

Distinguished
Jun 14, 2014
436
12
19,165
166
But the psu calculator said I only need a 500w psu, I don't get it?
That assumes a somewhat quality PSU. It will most likely work fine on a good 400W unit as well. Those calculators always assume you don't have the very best and keep in some headroom just to be sure. But even they don't assume something this noname.
 

Adam0ne

Great
Feb 9, 2021
140
24
95
3
I agree with everyone. Don't risk it.

FYI -The PSU is the lifeblood of your system. Any irregularities of the voltage can fry everything.

Look to the reliable brands like Corsair, Seasonic, etc. You should be fine.
 
No, No, and No.
It says it has 2 x 12 volt rails rated @ 18A that would be 432 watts but it would probably pop way before that.
Not only that, but you never actually ADD +12V rails. You really only have one +12V rail and then this is split into two circuit, each with an 18A OCP (in this case). So this PSU could actually only be a 250W PSU... which would not surprise me.
 

Zerk2012

Titan
Ambassador
Not only that, but you never actually ADD +12V rails. You really only have one +12V rail and then this is split into two circuit, each with an 18A OCP (in this case). So this PSU could actually only be a 250W PSU... which would not surprise me.
No crap!!!!!!!!!!!!!!!!!


EDIT most of these on the box it never actually says X amount of watts it's so easy with almost no regulation at all.
It will say more like 700W or 700 WA then when their busted they have absolutely no recourse because it never actually says watts. When you look at the model number it will say something like XXX 700W or WA and they can say that is the model number and they clearly listed the A it can draw!!!!!!!!!!!!!
 
Last edited:

TommyTwoTone66

Prominent
Apr 24, 2021
560
115
590
14
So i just bought the MSI HD 7970 Twin frozrlll. And I was thinking if my old PSU would work or not.BTW that PSU is from an unknown Chinese brand so do you guys think it would work?

My system:
Cpu: Core i3 6100
Ram: 2 sticks of 8 gb of ram DDR4 (16gb)
SSD: 128 gb
2 HDD: 2tb and 1 tb
PSU: arrow 650w
Mobo: h110m giga
Specification:
  • 24 pin connector for the motherboard
  • 6 pin for the Gpu( yes I'm buying an adapter 6 Pin to 2 X 8 Pin(6+2)
  • 8(4+4) pin for the cpu
And the rest is for my HDD and SSD

Heres the label of my power supply


That’s a 300W plus GPU and that PSU can only deliver about 400W total despite what the sticker says.

It would probably work, yes, but you’ll be putting a lot of stress on the PSU and risk it failing and destroying your motherboard and potentially anything else connected to it. Not to mention it will not be stable on that PSU and will likely crash and restart a lot.
 

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