crossfire 7970 psu

[BenjiGoneMad]

any recomandations for a psu (80+ gold), that can handle 2x 7970 (or 280x) and a 3570k with watercooling?
how powerfull does it need to be?

[nsyedhasan]

AX760 or AX860 if you want to have a lot of extra headroom.

[UnderADyingSun]

I would get 750w or above to be safe. Those cards use alot of power. 

[Elven]

Hey @BenjiGoneMad

 

I think any 80+ gold 600 watt power supply should be enough. Look for one in a price range you're happy with that is by corsair or seasonic, in my opinion. 

 

Maybe someone else can recommend some other brands, but they are the 2 brands I personally feel strongly to recommend.

 

Elven

[DoubleY]

Get a 800watt or so PSU. That'll leave some room for overclocking

 

@Elven 600watts isn't enough. I have a 700watt (granted it's 80+ bronze) PSU and it couldn't handle a HD 7990 while under heavy load.  7990 is more power efficient than 2x 280X's in CF. So you would need even more power. 

[91wow]

No need for gold rating on a gaming PC, you'll be paying more for it with less wattage. Get a good silver rated PSU at 750w+

[Elven]

 

 

600watts isn't enough. I have a 700watt (granted it's 80+ bronze) PSU and it couldn't handle a HD 7990 while under heavy load.  7990 is more power efficient than 2x 280X's in CF. So you would need even more power. 

 

Wow, that power hungry! *shock* them AMD cards, huh  :lol:

 

Thanks for the info!

[BenjiGoneMad]

it is also for mining so 80+ gold is a must

[BenjiGoneMad]

Hey @BenjiGoneMad

 

I think any 80+ gold 600 watt power supply should be enough. Look for one in a price range you're happy with that is by corsair or seasonic, in my opinion. 

 

Maybe someone else can recommend some other brands, but they are the 2 brands I personally feel strongly to recommend.

 

Elven

In the buyers guide a 650watt minimum is required for this 7970

[DoubleY]

Wow, that power hungry! *shock* them AMD cards, huh  :lol:

 

Thanks for the info!

I know. Such a shame

but glade that I could help inform fellow members. I am sure that I have stuff to learn from you too

[DoubleY]

In the buyers guide a 650watt minimum is required for this 7970

You could get away with a 550watt High-rated PSU and still do some overclocking. 

[Elven]

 

I know. Such a shame 

but glade that I could help inform fellow members. I am sure that I have stuff to learn from you too 

 

Indeed! I am not as familiar with AMD cards, as I have used Nvidia cards for many years, but I do find AMD cards amazing (as of lately with all the new technology and features coming out with them)  :lol:

 

LTT forum all about the friendly help 

[Elven]

 

 

In the buyers guide a 650watt minimum is required for this 7970

 

I did not know, thanks for the info 

[Rheinwasser]

NEX750G great psu and great price :-)

[BenjiGoneMad]

Im thinking in the lines of a tesla r2 1kW

[s3ns3]

In the buyers guide a 650watt minimum is required for this 7970

a good psu like seasonic G 450W can handle the 7970 no problems+oc.

 

any decent 750W psu will do. if you want gold take a look at super flower golden green 7-800,  seasonic G 750, corsair hx 750,cooler master v 700,seasonic  x 750 whichever its avaible in your country and cheaper. you pc would use ~500W full load.

[BenjiGoneMad]

mine will be the xfx 7970 black editions

[BenjiGoneMad]

I have two 7970's in CF with a i7 processor. I'm running a 1300w 80+ Gold PSU and before upgrading from my 850w 80+ Bronze PSU I looked at those websites that can calculate the approximate wattage based off of your system. Most of the websites recommended at least 950w, so I got my 1300w PSU on sale and it's pretty sweet. Let me know if you would like a link. Good luck with your hunt for a PSU.

 

I forgot to mention that I'm running MSi Lightning versions of the 7970's and they draw more than a typical vanilla 7970.

id like a link

[s3ns3]

Here you go.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817182063

This PSU is out of stock, but perhaps you could try amazon. Also, I would perhaps wait for a sale because I bought this guy for about ~$180 I think. Hope this helps.

thats a very good psu but you went massive overkill. you can power like 5 7970 ghz with that

[s3ns3]

I don't think it's overkill

it is. leave those websites and other psu calculators . a 1300 W psu can power 5 7970 + all the fans you can put in the case. your pc is in the ~500W zone at full load

 

even lower . check this http://youtu.be/mgU8gSM38U0?t=5m55s   3x 280X(7970ghz) + i7 six core full load 600W

Edited January 30, 2014 by s3ns3

[MoYo]

I have a XFX 850w black edition powering crossfire 7950's, it is 80+ gold rated and is essentialy a Seasonic psu, which are very good. It is fully modular and has all black cables.

And the price is amazing too http://us.ncix.com/products/?usaffiliateid=1000031504&sku=78945&vpn=P1-850B-BEFX&manufacture=XFX&promoid=1101

[TheDigitalRealm]

I have two 7970's in CF with a i7 processor. I'm running a 1300w 80+ Gold PSU and before upgrading from my 850w 80+ Bronze PSU I looked at those websites that can calculate the approximate wattage based off of your system. Most of the websites recommended at least 950w, so I got my 1300w PSU on sale and it's pretty sweet. Let me know if you would like a link. Good luck with your hunt for a PSU.

 

I forgot to mention that I'm running MSi Lightning versions of the 7970's and they draw more than a typical vanilla 7970.

You wasted a lot of money on that power supply friend. To the OP: any named brand (Seasonic, Corsair, XFX,) 750W power supply will be more than enough for any and all over clocking. (A 750W is easily enough for dual 780's)

[Faa]

I have two 7970's in CF with a i7 processor. I'm running a 1300w 80+ Gold PSU and before upgrading from my 850w 80+ Bronze PSU I looked at those websites that can calculate the approximate wattage based off of your system. Most of the websites recommended at least 950w, so I got my 1300w PSU on sale and it's pretty sweet. Let me know if you would like a link. Good luck with your hunt for a PSU.

 

I forgot to mention that I'm running MSi Lightning versions of the 7970's and they draw more than a typical vanilla 7970.

Rofl 1300W psu for cards that are pulling max 250W@Air. A 650W psu should be fine for his needs. I have 2 780's + a 3930K and the evga supernova 1000 P2, the psu's fan only kicks in at 700W and when playing BF4 it never kicks in.

[BenjiGoneMad]

I must admit those corsair hx series have got my attention

[adnank77]

I'm running this exact setup on Alienware which I believe is 850w