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Trifire 7970's...1050w Enough? - Page 6

post #51 of 65
Here is another 3-way power consumption test with 3-way 7970 CF. http://www.kitguru.net/components/graphic-cards/zardon/asus-hd7970-tri-crossfire-review/15/

They were running 3DMark11 on a i7 970 @ 4.6ghz on X58 mobo using the same AX1200.

338

1200W is not needed for three 7970's in normal gaming usage.
post #52 of 65
Just wanted to add I haven't seen anyone talk about external peripherals (USB stuff like Headsets/M/KB/usb hub/ect.) and the extra wattage required to run those as well as any disc drives or fan controllers/card readers ect. You have to consider the extra wattage added from these things as well.
     
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post #53 of 65
Quote:
Originally Posted by Riou View Post

Here is another 3-way power consumption test with 3-way 7970 CF. http://www.kitguru.net/components/graphic-cards/zardon/asus-hd7970-tri-crossfire-review/15/
They were running 3DMark11 on a i7 970 @ 4.6ghz on X58 mobo using the same AX1200.
338
1200W is not needed for three 7970's in normal gaming usage.

Yeah but that is still not the max what the system can draw. Normally when you game you don't stress your system to the max. The CPU is not running full throttle your HDD aren't running @ full read/write. When I run synthetic max stress tests I run prime95 and furmark @ the same time. When I do this I get 720W power draw @ the socket which translates to around 610w PSU output. Synthetic is of course synthetic but the point is that it can happen.
    
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post #54 of 65
prime and furmark are pretty unrealistic so i dont see the need to factor them into the equation, unless your leisure activity of choice is running prime and furmark tongue.gif
post #55 of 65
Im amazed that someone that knows a lot about PSUs, and everyone was telling OP to go to him for advice gets ignored or people still try to push their advice over his when they recommended him.

Advice, but when someone with greater experience and actually knows what he is talking about says one thing I would gladly accept until disapproved by facts.

Edit: also who cares if you PSu is always running near max when system is on load, great PSUs can handle it no problem, if that is the case you should not let CPUs, and GPUs run max when gaming with that logic. 1k PSU is fine.
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post #56 of 65
Quote:
Originally Posted by Vuashke View Post

prime and furmark are pretty unrealistic so i dont see the need to factor them into the equation, unless your leisure activity of choice is running prime and furmark tongue.gif

Hence the last bit "Synthetic is of course synthetic but the point is that it can happen." Just trying to point out that getting an accurate assessment of the needed safe margin can @ times be a bit tricky as there are a lot of variables in a system. Remember its not just PSU wattage but rail amperage as well that need to be considered. That been said if Phaedrus2129 thinks the 1050W in question is safe enough then I would believe him.
    
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post #57 of 65
jesus people are crazy
im running a 980x and a oced 7970 on a antec 520 80plus...
so 530 watts for another 2 7970s....its enough man
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post #58 of 65

@OP.

 

This is the power draw from the wall for a single 7970. http://www.overclock.net/t/1204293/powertune-and-radeon-7970#post_16273570

 

Decide the PSU wattage and safe limit for 3x 7970s + CPU LGA2011 and how far you will to push the system.

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post #59 of 65
OP -- You'll be fine on that 1050watt. Buddy has the Corsair HX 1000 watt with 3x 7970's a full water loop about 6 fans, 3 HD's an SSD and has everything overclocked to the max. You'll be fine on what you get.

If you feel it's not enough and you're either going to grab another case and PSU, I'd get a whole nother PSU before I go that route....But none the less, it's enough for what you need and will do
     
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post #60 of 65
Quote:
Originally Posted by Riou View Post

Here is another 3-way power consumption test with 3-way 7970 CF. http://www.kitguru.net/components/graphic-cards/zardon/asus-hd7970-tri-crossfire-review/15/
They were running 3DMark11 on a i7 970 @ 4.6ghz on X58 mobo using the same AX1200.
338
1200W is not needed for three 7970's in normal gaming usage.

That's silly low. My trifire 7970 draw 900w on game benches, and over 1100w on synthetic prime + furmark.
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