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Will this PSU work with this GPU????

Last response: in Components
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September 2, 2012 11:34:20 AM

The graphics card: XFX Radeon HD 6870 1GB GDDR5
LINK: http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...
The power supply: OCZ ModXStream Pro 700W PSU
LINK: http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...

The graphics card I stated above requires two 6-pin connectors, so my question is will this power supply work with this graphics card? Does anyone know FOR SURE if this specific power supply (the one I have listed above) has TWO 6-pin connectors?? Will this power supply work with any generic motherboard do you think?

Other PC parts:
ASUS generic HDMI mid-ATX motherboard (it's a pre-built ASUS desktop, which is why I say generic)
Intel Core i5-2320 @ 3GHz

More about : psu work gpu

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a b ) Power supply
September 2, 2012 11:35:52 AM

It has 1 x 6-Pin, 1 x 6+2-Pin PCI-E power connectors...

The PSU will work with ATX form factors.

Which are the standard anyway.

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a b ) Power supply
a b U Graphics card
September 2, 2012 11:58:59 AM

and its vastly overpowered, and at the same time underpowered. you can get 500W's that has 2x 6+2's and enough amps.
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September 2, 2012 2:59:10 PM

13thmonkey said:
and its vastly overpowered, and at the same time underpowered. you can get 500W's that has 2x 6+2's and enough amps.


Here's a list of the hardware in the desktop:

- ASUS generic desktop mid-ATX motherboard (don't know the exact model name, sorry.)
- Intel Core i5-2320 @3GHz (turbo up to 3.3GHz) with stock heatsink and fan.
- XFX Radeon HD 6870 1GB GDDR5 (core clock speed @ 900MHz)
- 6GB DDR3 RAM @ 1600MHz
- 2TB of total HDD space (1TB internal HDD, two 500GB external USB HDD's)


Here's what I've researched as being the approx. power usage for all the major parts:

Core i5-2320 - 95W
XFX Radeon HD 6870 1GB - 250W-300W at full load

---THAT'S ALREADY ALMOST 400W RIGHT THERE!!---

Then there's:
2 x 3GB RAM @ 1600MHz - approx. 8W-10W
ASUS motherboard - 20W-60W
Everything else... - let's just round it off at 40W to be safe

So the desktop uses approx. 480W-500W, and I'm getting a 700W PSU, which yes, it's 200W more than my system uses, but isn't it better to have more power than needed as opposed to not enough? 200W of extra power (probably 150W effective approx. if you count the efficiency) doesn't seem like that much extra power, or is it??
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a c 243 ) Power supply
a b U Graphics card
September 2, 2012 3:06:17 PM

firinmylazerman said:
Here's a list of the hardware in the desktop:

- ASUS generic desktop mid-ATX motherboard (don't know the exact model name, sorry.)
- Intel Core i5-2320 @3GHz (turbo up to 3.3GHz) with stock heatsink and fan.
- XFX Radeon HD 6870 1GB GDDR5 (core clock speed @ 900MHz)
- 6GB DDR3 RAM @ 1600MHz
- 2TB of total HDD space (1TB internal HDD, two 500GB external USB HDD's)


Here's what I've researched as being the approx. power usage for all the major parts:

Core i5-2320 - 95W
XFX Radeon HD 6870 1GB - 250W-300W at full load

---THAT'S ALREADY ALMOST 400W RIGHT THERE!!---

Then there's:
2 x 3GB RAM @ 1600MHz - approx. 8W-10W
ASUS motherboard - 20W-60W
Everything else... - let's just round it off at 40W to be safe

So the desktop uses approx. 480W-500W, and I'm getting a 700W PSU, which yes, it's 200W more than my system uses, but isn't it better to have more power than needed as opposed to not enough? 200W of extra power (probably 150W effective approx. if you count the efficiency) doesn't seem like that much extra power, or is it??

There's alot that's wrong there, let's just go with the biggy
That 250-300 watt full load figure is for an entire system , not the card by itself
You could easily run your system on a 380 watt psu
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a b ) Power supply
a b U Graphics card
September 2, 2012 3:07:28 PM

my 3570k @4.3Ghz, gtx470, 4x4Gb, 5x120mm, 2xhdd, 1xSSD takes about 350 from the wall (I measure it).

The point about your PSU is that a 500W+ PSU should have more than 1x6pin and 1x6+2pin, I therefore think that it is not a well specced PSU. you could run 4x6pin, or perhaps 2x6pin and 2x6+2pin from that wattage. I think that 2x6's + the slot itself is 225W max, so 2 of those and you are at 450W, + 250 for other components = 700W, so what is the 700 in your proposed PSU doing? if 6+2's are included then you have +150W being consumed, so just 100W for other components.

I think you'll look at that PSU and find that the 12V amps are a little low. There are just 522W on 12V, thats low for a 700W supply.
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September 3, 2012 4:47:26 PM

13thmonkey said:
my 3570k @4.3Ghz, gtx470, 4x4Gb, 5x120mm, 2xhdd, 1xSSD takes about 350 from the wall (I measure it).

The point about your PSU is that a 500W+ PSU should have more than 1x6pin and 1x6+2pin, I therefore think that it is not a well specced PSU. you could run 4x6pin, or perhaps 2x6pin and 2x6+2pin from that wattage. I think that 2x6's + the slot itself is 225W max, so 2 of those and you are at 450W, + 250 for other components = 700W, so what is the 700 in your proposed PSU doing? if 6+2's are included then you have +150W being consumed, so just 100W for other components.

I think you'll look at that PSU and find that the 12V amps are a little low. There are just 522W on 12V, thats low for a 700W supply.


Been using this PSU for the past day now with no problems (except that HWMonitor is giving false statements sometimes :p )

Ran Crysis 2 at max settings with the HD 6870 and the i5-2320 and the new PSU, and it runs flawlessly, besides the fact that it makes the GPU run at 72-76 degrees celsius. All other games make the GPU run at between 60-65 degrees celsius. Temperatures are a little high everywhere at idle (CPU is idling around 38-40 degrees celsius, GPU is idling at around 40 degrees celsius) but but I assume all of the high temperatures are due to the fact that the case is just small. Not a lot of room for the components to breathe.
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a b ) Power supply
a b U Graphics card
September 3, 2012 5:36:30 PM

small cases = more air changes per hour = good temps. your temps are fine.
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September 13, 2012 12:05:46 AM

Best answer selected by firinmylazerman.
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