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HX850 handle a 6990 and 6970?

post #1 of 14
Thread Starter 
I just got this PSU and now I have eyefinity, and am thinking this PSU may not be enough to power what is basically trifire 6970's. I still have some time to exchange this PSU for a 1000w if I need it with tiger Direct.
post #2 of 14
It is enough

Your rig, I would assume, pulls about 700w from the wall
post #3 of 14
With the Radeon HD 6990 and the 6970 you'll be pulling about 600 watts from the wall, coupled with around 150W from the CPU and 50W from peripherals. That's 800W from the wall. Take into account 85% efficiency, and the PSU has to produce 680W. This is all at max load for ALL the components, BTW, so you'll be fine.
    
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post #4 of 14
Yes.
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5820k ga-x99-sli gigabyte 7970 wf 16gb 4x4 lpx 
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5820k ga-x99-sli gigabyte 7970 wf 16gb 4x4 lpx 
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samsung 830 128gb ven x/gt ap-15 evga g2 650w corsair 450d 
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jbl lsr305 
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post #5 of 14
Thread Starter 
How do you all figure out how much power it is pulling? I wouldlike to be able to keep an eye on it and know how much power is being used.
post #6 of 14
Quote:
Originally Posted by Topgearfan View Post
How do you all figure out how much power it is pulling? I wouldlike to be able to keep an eye on it and know how much power is being used.
Most reviews tell you either the system power consumption or the power consumption of the part itself. I use TPU for checking max power consumption on the graphics cards. For the CPU, I know that a Core i7 2600K at 1.4V will pull around 150W.
    
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Seagate Momentus 7200.4 320GB LG GSA-T50N, HP dvd1170r Windows 7 Home Premium 64-bit HP W2207 22" (1680x1050) 
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Seagate Momentus 7200.4 320GB LG GSA-T50N, HP dvd1170r Windows 7 Home Premium 64-bit HP W2207 22" (1680x1050) 
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post #7 of 14
Quote:
Originally Posted by Topgearfan View Post
How do you all figure out how much power it is pulling? I wouldlike to be able to keep an eye on it and know how much power is being used.
Review sites normally tell you how many watts are being drawn from the wall.
(Though remember you need to factor in x% efficiency--i.e. 600w rig power consumption + (1-.x)(600) = (1200-0.x600)w drawn from the wall)

Here is an example of a power consumption meter
post #8 of 14
Are you overclocking the CPU, and do you plan to overclock the video cards? Also how new is the PSU? If not overclocking, you're going to be at +/- 810w at load so you'll be close but it'll work fine. If the power supply is older, I subtract a 20-30 watts for every year after two years. I do suggest getting a new power supply because you don't want to be that close to full load all the time.

I had a gigabyte odin 800 GT go out on a single 6990 and it had decent reviews.
post #9 of 14
Thread Starter 
I may OC the CPU and the cards. The PSU is a week old and the rest of the PC is 3 weeks old. Some reviews seem to say the Corsair HX series were under rated poiwer wise so i am not sure if i will need a bigger one.

Quote:
Originally Posted by JMCB View Post
Are you overclocking the CPU, and do you plan to overclock the video cards? Also how new is the PSU? If not overclocking, you're going to be at +/- 810w at load so you'll be close but it'll work fine. If the power supply is older, I subtract a 20-30 watts for every year after two years. I do suggest getting a new power supply because you don't want to be that close to full load all the time.

I had a gigabyte odin 800 GT go out on a single 6990 and it had decent reviews.
post #10 of 14
my tx850 handles it like a champ. both cpu and graphics card are overclocked not to mention I have 2 velociraptors, tons of fans and a few ccfl's
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