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4870x2 POWER question

Last response: in Graphics & Displays
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July 13, 2008 8:59:03 PM

How big of a PSU will I need. I read it recomends a 650w

4 my new build
asus p45
q6600 oc 3.2
2x2g ocz 800
1 dvd burner
1 500g sata HD
4 case fans

I want to OC as much as I can will the corsair 650w TX have enough power? I really wana save some $ and not have to buy the 750w but I will if i need to.

THANKS

More about : 4870x2 power question

July 13, 2008 9:09:38 PM

Why are you getting a P45 board for a CrossFire setup like this? It will only do 8X x2 in Crossfire as opposed to the X38 or X48 boards which will do 16X x2 CrossFire.
July 13, 2008 9:20:19 PM

im pretty sure tat psu will b enough for 4870x2. I got the same psu and waiting 4 the same graphics. i got no worries. It looks pretty powerful with 52a on the 12v rail. Wonder how many 6 pin connectors the 4870 is gonna have, 4870 has two 6 pin...perhaps two 8 pins
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July 13, 2008 9:23:16 PM

he means sparta the single card i think? But anyways if it says 650 then you will be find because they normally over estimate and that corsair is really like a 700watt compared to cheap power supplys.
July 13, 2008 9:27:14 PM

rgsaunders said:
Why are you getting a P45 board for a CrossFire setup like this? It will only do 8X x2 in Crossfire as opposed to the X38 or X48 boards which will do 16X x2 CrossFire.


i agree. i like having options when i buy computer parts even if i ain't using it at the moment. i would rather get a x38/48 board just in case you ever go CFx ;) 
July 13, 2008 9:28:10 PM

It's definately not enough for 4870x2 plus an oced 65nm quad. It'll boot, but crush on full load. Brands aside, a tractor made by BMW is still just a tractor. When it's not enough, it's not enough. You'd need at least 750w with good 12v rail ratings, ideally 850+w just to be safe and leave some headroom.
July 13, 2008 10:01:23 PM

dagger said:
It's definately not enough for 4870x2 plus an oced 65nm quad. It'll boot, but crush on full load. Brands aside, a tractor made by BMW is still just a tractor. When it's not enough, it's not enough. You'd need at least 750w with good 12v rail ratings, ideally 850+w just to be safe and leave some headroom.



WTF? since when is a corsair 650 a "tractor" ?

Go ahead and run your 850w psu and waste all the electricity you want. I hear energy is cheap right now.
July 13, 2008 10:25:42 PM

I'm looking to get a 4870x2 and I have a OCZ 700w gameXstream. So I guess that would run it. And it has 4 12v Rail with 18A on each (for I guess 48A total) is that good?
July 13, 2008 10:28:44 PM

thats a great PSU
BTW using that link I gt it says u need 1 6pin 1 8pin and i think urs has 2 6 pins. need somthing for that
July 13, 2008 11:09:10 PM

Its a little premature to be guessing on the power consumption an HD 4870X2, seeing as we haven't yet seen any real info on the product. You can take a wild assed guess based 4870 x 2 but that is no guarantee. Just wait for it, or else make sure you add a comfortable margin just in case. Also, when using that power supply calculator, make sure you include your planned overclock on the cpu, and allow 10-20% at least for capacitor aging.
July 13, 2008 11:10:08 PM

Wait... its near the top under Connectors. sorry.
July 14, 2008 12:09:33 AM

ok yeah 6 and 6+2 will work great. Ill probably get the gamexstream then since it has the right connectors
July 14, 2008 12:26:14 AM

from the initial reference boards for the 4870 x2 had a 6 and an 8 pin connector and it looked like it could run with just 2 6 pins
!