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965BE C2 power draw

post #1 of 7
Thread Starter 
What is the power draw for a 965 BE? I was under the seemingly mistaken impression that it was the same as the TDP - 140W, but now I see that is a thermal rating, not a current one.

Anandtech puts the power draw of a loaded 965 BE at 223 watts. Is this about right?

http://www.anandtech.com/show/2819/8

I don't really understand why the motherboard is rated to hold 140W CPU's if that is more to do with the capacity of the cooler to dissipate heat, rather than the capacity of the mobo to provide current.

If I have a CPU that's drawing 220-odd watts, that's nearly half the current from my 500 Watt PSU, so how much do I really have to spare for graphics and peripherals?

I've got two 12v rails of 18A each.
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post #2 of 7
The Graphs shows only the total power consumption. This includes the Mainboard, Graphic, keyboard... The Cpu itself needs less power.
A good 500 watt PSU is more than enough except you want to run a crossfire / sli system.

I have the same Processor with 140 watt usage and i tested it today: My usage with the system + monitor is ~425 Watt WITH running Furmark and Prime95. This is the absolut stress test and the GTX 570 use about 200 Watts.
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post #3 of 7
Thread Starter 
Well, that's good news, heavy stress tests and big G-card runs OK, thanks!
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post #4 of 7

TDP is about as much a measure of power consumption as it is heat output.  Motherboard manufacturers need to ave some sort of reference for power consumption so that VRM systems can be designed accordingly and appropriately.

 

But I wouldn't worry about your combination x4 965 C2 + GA-MA790XT-UD4P - in fact I ran the same combination from September 2009 to May 2010 (1055T release) with a 3.8Ghz overclock.

post #5 of 7
Thread Starter 
OK good stuff.
What are the odds of being able to run two AMD 77xx cards off a 500Watt PSU, those new cards are very nicely efficient?
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The Watt Gobbler
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post #6 of 7
You should be able to crossfire 7770s easily. Those cards don't draw much power.
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post #7 of 7
Thread Starter 
I think that's pretty good going by AMD to drop the power use so much - I could get a Xfire setup going without having to buy new PSU.

Cheapest 7750 is £86 on ebay, about the same as for an HD 5850. 7770's are £100. So price performance isn't there yet, but when price starts dropping it may be OK.

Looking through the reviews, a 7770 is almost up to par with a 6850, which is in turn just below a 5850, so it's not bad at all. You could get nearly the same performance as a 6850 for much less power draw.
The Watt Gobbler
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The Watt Gobbler
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