Cross Fire Wattage question?

[Kato1144]

Hey I was about to buy a second 6950HD 2GB to cross fire it but im concerned about the power consumption for my 900 Watt ASUS Gamer Power supply, and i did some math based on stats i found on the net on all my hardware and came up with 920 watt theoretically anyway will i be ok even if I overclock or should i just not do it?

Stats

6950HD 2GB HIS
i7 Core 2600k @ 3.4GHz
8GB Corsair vengeance ram
ASUS P8 Z68-V Pro MOBD
2x Kingston 60GB SSD HDD
1TB Segregate SATA
ASUS 900 Watt gamer current edition or something like that.....
it says its SIL ready so i hope it will be good....

 

[Lorien]

900W should be more than enough to run a pair of 6950s plus the rest of that gear.

 

[pman065]

a Good 750W can power 6950 2gb crossfire
so yes 900w is more than enough

 

[happymedium]

I would give the Antec EarthWatts 650 a go with 2 , 38 amp rails. Just use the 6 pin adapters.
A overclocked 2500k uses only about 120 watts and the 6950's will use 375 watts.

I bet it will easily work.

 

[Kato1144]

thanks i will do it ordering the card now
of btw it has to be the exact same card manufacturer and such eh?

 

[SIRTIM3]

I have 6950 tri fire flashed to 6970 volts, watercooled system dual pumps, 2500k @5ghz and average around 700-800 watt usage on load.

 

[Lorien]

thanks i will do it ordering the card now
of btw it has to be the exact same card manufacturer and such eh?

No, they can be from any manufacturer. You can even crossfire it with a 6970 though the 6970 will run at the 6950 clocks. Crossfire does not have the limitations of SLI.

 

[Kato1144]

thanks for the info

 

[FaRKle0079]

If your PSU can put out a constant 900W you'll be fine. My sig rig when stressed fully with OCCT PSU test draws 850W DC.

 

[Evil Scooter]

Rig in siggy.. full load (100% GPU & CPU) using kill-a-watt at outlet =525w. Idle 130w.