Can my computer run the HD7770?

[Twisted0n3]

Hello, I'm kinda new to this whole computer upgrading thing. So, I was wondering if my computer, http://h10025.www1.hp.com/ewfrf/wc/document?docname=c03359045&tmp_task=prodinfoCategory&cc=us&dlc=en&lc=en&product=5231389#N1287 , which states that it has a 300w psu could run this card, http://www.asus.com/Graphics_Cards/AMD_Series/HD77702GD5/#specifications . The card states, I think, that it only needs 150w. Is half my psu going in to my graphics card a bad thing? Any help is appreciated!

 

[nukemaster]

More important then the wattage alone is how much of that wattage is on the 12 volt rail. Please look for a 12 volt AMP rating(combined rating if it is multi rail). While the card has access to 150 watts(75 board + 75 6-pin pci-e cable) it will NEVER use that much.

PSU with combined rail example. 22 x 12 = 264 watts @ 12 volts

 

[Twisted0n3]

I'm not sure if this is what you mean, but the psu says it has 100v-240v. And also Nominal input voltage range: 200-240V/3A (50-60Hz). Sorry if this doesn't help. I guess I don't quite understand what you mean.

 

[nukemaster]

If you see on the image above the power supply lists different voltages.

12(yellow)
5(red)
3.3(orange)
ect

Each of those voltages has a maximum power. While the full power supply can deliver 300 watts, some can only dive 150-200 of its power as 12 volts the rest is 5 and 3.3. Now modern systems run most things from the 12 volt rails(video cards and cpu for sure).

So if you do not have enough power on the 12 volt rail(s) then you DO need a new power supply for sure. I have seen 500 watt power supplies with less 12 volt power then a good quality 300-350 watt unit. Its all about quality.

Another user here is posting about an HP power supply and even provided an image.
Is this like yours? It has 18 amps and will NOT run a 7770 without risking system issues.

http://i.imgur.com/wk6Ew.jpg

 

[Twisted0n3]

If you see on the image above the power supply lists different voltages.

12(yellow)
5(red)
3.3(orange)
ect

Each of those voltages has a maximum power. While the full power supply can deliver 300 watts, some can only dive 150-200 of its power as 12 volts the rest is 5 and 3.3. Now modern systems run most things from the 12 volt rails(video cards and cpu for sure).

So if you do not have enough power on the 12 volt rail(s) then you DO need a new power supply for sure. I have seen 500 watt power supplies with less 12 volt power then a good quality 300-350 watt unit. Its all about quality.

Another user here is posting about an HP power supply and even provided an image.
Is this like yours? It has 18 amps and will NOT run a 7770 without risking system issues.

http://i.imgur.com/wk6Ew.jpg

http://imgur.com/ROPMM

Just took a look...
3.3v - 12.0a
5.08v - 13.0a

12va -12.0a
12vb - 16.0a
5.08Vsb - 2.0a

I believe that's what you were talking about. So, I have two 12v connectors, at 12a and 16a respectively. I don't know what "a" means though. There is something that says the 3.3v and 5.08v are a total of 103 w max. I think that leaves enough over for it?

 

[nukemaster]

While you have no listing for combined, I am willing to bet it matches the other posters specs. I think you would have a hard time running a 7770 without something more powerful.

It does not need to be a massive power supply, but something in the 450-500 range should give you a good margin over extra power.

It is very important to get a good quality power supply(Antec/Corsair/XFX/OCZ/FSP/SEASONIC/ect) as you can run into some real cheap junk on the market.

 

[griptwister]

I have a friend who runs a GTX 670 and an i7 all on a 350w PSU lol. I'd reccomend upgrading to at minimum a 450w PSU.

 

[nukemaster]

I bet its a good 350 watt power supply.

I run an i5 750 + 650 ti on a 300 watt power supply on it right now.

 

[griptwister]

I bet its a good 350 watt power supply.

I run an i5 750 + 650 ti on a 300 watt power supply on it right now.

Lol, Yes. It's a very good one!

 

[suat]

If you are not a gamer, then your gfx card will never need that much power to run.

I suggest you check the dimensions of the card and the space inside your computer so that you do not come into surprises when it is time to install the card.

You can check power requirements of your computer by going to: http://www.thermaltake.outervision.com/ or to: http://support.asus.com/powersupply.aspx