4870x2 POWER question

[licid24]

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

 

[rgsaunders]

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.

 

[thepinkpanther]

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

 

[jpbg]

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.

 

[aznguy0028]

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

 

[dagger]

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.

 

[bigbruver]

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.

 

[licid24]

Thanks guys take a look at these

http://forums.vr-zone.com/showthread.php?t=299884
requires a 650w 1-6pin 1-8 pin

http://extreme.outervision.com/psucalculatorlite.jsp
If you use that with my set up it only comes out to 542watts

 

[geckoar]

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?

 

[licid24]

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

 

[geckoar]

It has 1 6 pin and 1 6+2 pin(Would that be 8 pin?) http://www.ocztechnology.com/products/power_management/ocz_gamexstream_power_supply-nvidia_sli_ready_ its near the bottom of the page. Would that work? for a 4870X2.

 

[rgsaunders]

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.

 

[geckoar]

Wait... its near the top under Connectors. sorry.

 

[licid24]

ok yeah 6 and 6+2 will work great. Ill probably get the gamexstream then since it has the right connectors

 

[daft]

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