Wondering if a 300 watt supply can run a amd radeon hd 6670 2gb

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KiwiKewei

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Jul 23, 2013
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I have a hp pavilion with a 300 watt supply and i want to upgrade my gpu but the requirements for this gpu is 400 watts so im wondering if it will run

My computer specs are: Windows 7 ultimate 32-bit (it really is 64-bit but got downgraded because my computer got damaged and had to be repaired but i can upgrade to 64 bit)
intel quad core 2.4 ghz
3 gb ram

Geforce 8400gs

The graphics card i plan to get is :http://www.amazon.com/Gigabyte-Express-Crossfire-Graphics-GV-R667D3-2GI/dp/B0086A7AB8
i am also planning to get this if i cant run the 2 gb one :http://www.amazon.com/XFX-Radeon-HD6670-PCI-Express-HD667XZHF3/dp/B004Z5GRW6/ref=sr_1_1?s=electronics&ie=UTF8&qid=1374552903&sr=1-1&keywords=Radeon+HD+6670+1GB
 
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fudoka711
Actually, technically you might be fine with a 300W PSU. What is your cpu? If its TDP is <95-105W you will be fine, even when taking into account that the PSU is most efficient when delivering at 80% of its rated capacity. TDP for your system will probably be around 200W. The 6670 has a TDP of like 66W. I am wondering though, are you willing to spend a bit more and get the hd 7750? It's even stronger and only has a TDP of 50W. You can buy one on sale for ~$90.

Edit: in fact, check out tom's "best gpu for the month" article they just posted for the month of july. It lists both of those gpu's.
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InfoOverloader

InfoOverloader

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Jul 18, 2013
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Your processor and motherboard will take a big bite out of the 300 watt power supply. I would suggest getting a 500 watt power supply or above. You will not be able to power your GPU with your current setup. Even if you only had to power the GPU you conld not do it.
 
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fudoka711

fudoka711

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Actually, technically you might be fine with a 300W PSU. What is your cpu? If its TDP is <95-105W you will be fine, even when taking into account that the PSU is most efficient when delivering at 80% of its rated capacity. TDP for your system will probably be around 200W. The 6670 has a TDP of like 66W. I am wondering though, are you willing to spend a bit more and get the hd 7750? It's even stronger and only has a TDP of 50W. You can buy one on sale for ~$90.

Edit: in fact, check out tom's "best gpu for the month" article they just posted for the month of july. It lists both of those gpu's.
 
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KiwiKewei

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My Cpu is a intel quad core 2.4 ghz
 
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KiwiKewei

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So if i upgraded my psu i still wont be able to run the gpu?
 
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InfoOverloader

InfoOverloader

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If you upgrade you would be able to run the GPU.
 
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toyftw

toyftw

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Jul 29, 2012
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Hi - the 400w requirement is to cover PSU's that can't deliver their rated power
and older PSU's that don't supply enough current to the +12v rail(s).

You can pretty much determine whether that PSU will be enough by looking
at the label affixed to it's side and find the +12v amps available. Anything above
17amps on the +12v rail(s) will run your sys with a 6670 or 7750.

A 7750 is a better choice if you have the funds.

If you are unsure - post the PSU's label specs here. There is a good chance you
can run that system with your current PSU, but we need to find it's +12v specs.

 
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toyftw

toyftw

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jessterman21

jessterman21

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HP generally uses decent units - and seriously, that PC + HD 7750 at MAX load on GPU and CPU will draw no more than 150w.
 
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swilczak

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I would upgrade the PSU simply because HP doesn't use PSU's that are 80% efficient, they are more like 70%. Your system may run fine for a while with a new GPU but down the road you will almost certainly run into problems. You have to remember that HP builds computers for as cheap and they can and sells them for as much as they can to maximize profit. Even computers made for gaming like Alienware don't have enough power. They don't care as long as it lasts you past the warranty period then they want it to break so you can pay them to fix it.
 
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swilczak

swilczak

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The CPU and GPU alone will draw 150 watts, what about all the other component like the motherboard, Ram, hard drive, CD drive, USB ports and any other kind of expansion cards that may be in the computer.
 
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swilczak

swilczak

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If you don't have money for a new power supply then add the graphics card and just remember that down the road you need to replace it with something better. If your computer isn't too old you should be fine for a while until the capacitors degrade. I would say within the next year replace it especially if you use it for gaming often. If your power supply gives out it can take the rest of the computer with it, and you will have to buy a whole new computer because you didn't spend $40 on a new PSU.
 
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swilczak

swilczak

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Good idea, better safe than sorry. I just fixed an HP computer not long ago with the same cpu you have. Someone added an entry level graphics card with it's 300 watt PSU and the PSU died. Luckily that's the only thing that needed to be replaced.
 
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