How much power for 4x 7970s?

AndrewYang · Jan 26, 2014

What type of power supply would I need for a litecoin mining rig with 4x 7970s?
Would this cut it:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151109

aevm · Jan 26, 2014

This site recommends 1300W
http://www.realhardtechx.com/index_archivos/Page362.htm

I think that Seasonic will do it anyway.

ahmeday2012 · Jan 26, 2014

You should get a 1500w PSU. Just to be on the safe side.

tonyzet · Jan 26, 2014

It will do.

PS: You do realize that you will need about 3 Cosmic Years in order to amortize the cost of this PC with bitcoin, right?

aevm · Jan 26, 2014

Look here:
http://www.guru3d.com/articles_pages/asus_radeon_hd_7970_crossfire_review,7.html

They recommend 750W for a system with two cards, and measure 407W for two cards, add them up. The Seasonic X-1250 can do the job.

AndrewYang · Jan 26, 2014

Would something like this work? It's silver plus, but that should be fine right?
http://www.newegg.com/Product/Product.aspx?Item=N82E16817256054

aevm · Jan 26, 2014

I'm really curious to know how you will cool this monster...

AndrewYang · Jan 26, 2014

@aevm Box Fans

tonyzet · Jan 26, 2014

AndrewYang :

Better idea

AndrewYang · Jan 26, 2014

tonyzet :

I live in Minnesota, could just throw it in the snow

ahmeday2012 · Jan 26, 2014

AndrewYang :

It would, but I don't think it has enough power cables to fit in 4 graphics card. You may need to buy extra adapters to cover-up the rest of the GPUs.

aevm · Jan 26, 2014

The Silverstone ST21500 offers 110A. The Seasonic offers 104A. The real difference is 6A i.e. 72W, not 250W like you'd think

AndrewYang · Jan 26, 2014

aevm :

Dang you know your stuff. What do you think about this?
http://www.newegg.com/Product/Product.aspx?Item=N82E16817194105

aevm · Jan 26, 2014

Love that cooling solution, thanks

aevm · Jan 26, 2014

AndrewYang :

112.5A, and excellent efficiency (up to 94%). It does look very good.

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