1 or 2 4870

[insane84722]

How much wattage do I need?

 

[newbiebuilderguy]

I recommend at least 1200 you can do a rough calculation here Newegg - Power Supply Calculator

 

[insane84722]

How many cards would that count as? 2 or 3?

 

[newbiebuilderguy]

On the calculator , u can choose the # of graphics cards
What power supply do u have?
You should put your specs in your signature

 

[insane84722]

Yes, I know. With a quad core, high end mb, 8gb ram, 2 dvd-rw, 3 7200 rpm hds and 2 4800 series cards, I get 689w.

I have Newegg.com - CORSAIR CMPSU-750TX 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply - Power Supplies and will get a highier one if needed.

 

[newbiebuilderguy]

Well , I think that about answers all

 

[insane84722]

Yes. Along with fans, etc... I think 750 should be enough. If not, can always get 850.

 

[newbiebuilderguy]

My recommendation is at least 1000 watts. that's all
You miscalculated somehow.

 

[insane84722]

Kind of hard to select the wrong thing on the calculator. If you want a picture, say so. You can also show me how your getting your figures.

 

[gurusan]

For tri-fire i would recommend 850 at a minimum.