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5850 Power Consumption.

sjcf1

sjcf1

sjcf1

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Joined
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Location
West Yorkshire/Birmingham
Thinking off adding a 2nd 5850 into my rig as I can pick one up for a nice price. Would my 600W psu be able to cope with the 2nd card? Rest of the Spec is as follows - the PSU hasn't got another 2x6 Pin power connectors, just some free molex's.

Rest of the System is
I7 920 at stock - will overclock when the warrenty runs out in a couple of years.
ASus P6t motherboard.
3Gb 1600mhz ram - might add another 3gb at a later stage
3x120gb Caviar Black Drives
2x1Tb Caviar green Drives
In an Antec 900 Case.

So would I be able to include another 5850 in here without getting another power supply.
 
Won't be enough, A second card requires you to add another 170 Watts. You need a 650+ Watt power supply unit for your a high-end system. That power supply needs to have (in total accumulated) at least 55~60 Amps available on the +12 volts rails.
 
Well a HD 5850 uses 150W at furmark peak (AMD state load TDP is 151W)

http://www.techpowerup.com/reviews/HIS/HD_5850/28.html

So for crossfire HD 5850 need 300w or 25+ amps on 12v rail alone. Then there's the other components which need power from the 12v rail.

Overclocking will require some more power as well (i7s are very power hungry when overclocked to 4ghz+).
 
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mhmmmm. I'd need a new psu as a result :/ Think that at even £130 delivered its not going to be enough of a deal.
 
sjcf1 said:
mhmmmm. I'd need a new psu as a result :/ Think that at even £130 delivered its not going to be enough of a deal.
Click to expand...

I say it depends how badly you want to overclock your CPU and GPUs. Assuming its a decent 600w psu, it may be possible.

edit:

I'm trying to find a crossfire system power consumption figure online where they aren't running a heavily OCd i7.

edit2:

Here we go

System: http://www.anandtech.com/show/2848/3
Power consumption: http://www.anandtech.com/show/2848/13

It depends also on whether you think you'll reach furmark loads in actual games.
 
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Well. I'd be overclocking when the warrenty runs out. So I'd doubt that I'd be using the same PSU then.
 
ghost101 said:
I say it depends how badly you want to overclock your CPU and GPUs. Assuming its a decent 600w psu, it may be possible.

edit:

I'm trying to find a crossfire system power consumption figure online where they aren't running a heavily OCd i7.

edit2:

Here we go

System: http://www.anandtech.com/show/2848/3
Power consumption: http://www.anandtech.com/show/2848/13

It depends also on whether you think you'll reach furmark loads in actual games.
Click to expand...

By the looks of that, I'm not going to be able to do it, as theres other stuff that will draw a few watts also. Think that it'll be a case of getting a new case another GPU and PSU - maybe after xmas.
 
sjcf1 said:
By the looks of that, I'm not going to be able to do it, as theres other stuff that will draw a few watts also. Think that it'll be a case of getting a new case another GPU and PSU - maybe after xmas.
Click to expand...

Or just sell hd 5850 and purchase a hd 6970 as long as power consumption is ~250w.
 
I used to run 2 5850 in my setup belows and this would pull 430w from the mains with 3d winmark and prime running.
 
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