7970 cf help

[lasttimeii]

Hi guys in my room and my moms room we are allow 15 amps not sure if its amp but that's what it shows on the breaker 15 nothing else so the thing is i'm able to turn on my ps3 40" lcd tv 3 asus monitor 23" each running at 5760x1080 also got 2 ac low energy ac , and my 7970 vapor x running with a 650w psu i'm thinking on getting my other 7970 to cf with a 1200w psu but i'm not sure if i will be able to funny thing is with just my pc on and my mom blow dryer the breaker breaks . but with 2ac ps3 pc tv 3 monitor it stays on so yea what do you guys think i suck when it comes to electricity

 

[te100]

yes 15 amps is the limit for the circuit. You say 2 ac is that 2 air conditioners? if so they pull probably 5 to 7 amps each depending on the size.

Sometimes breakers get weak and will trip sooner than they should.

But sounds like an overloaded circuit.

 

[JackNaylorPE]

1200 watts is output, so at say 85% efficiency, you are talking maximum input of 1411..... at 115 volts, that's 12.27 amps.

You don't need 1200 watts fro two 7970's tho.

The two cards together will pull about 375 watts ...gaming should get you just over 500 watts with Furmark grabbing about 650

http://www.legitreviews.com/article/1834/11/

I'd figure a total pull of about 6 amps under playing conditions.....

But 3 monitors, a TV, PS3, two AC's.... ??? That's way more than I'd put on a 15 amp circuit.

Buy yaself one of these

http://www.amazon.com/P3-International-P4460-Electricity-Monitor/dp/B000RGF29Q

 

[bigcyco1]

1200 watts is output, so at say 85% efficiency, you are talking maximum input of 1411..... at 115 volts, that's 12.27 amps.

You don't need 1200 watts fro two 7970's tho.

The two cards together will pull about 375 watts ...gaming should get you just over 500 watts with Furmark grabbing about 650

http://www.legitreviews.com/article/1834/11/

I'd figure a total pull of about 6 amps under playing conditions.....

But 3 monitors, a TV, PS3, two AC's.... ??? That's way more than I'd put on a 15 amp circuit.

Buy yaself one of these

http://www.amazon.com/P3-International-P4460-Electricity-Monitor/dp/B000RGF29Q

+1 that makes sense i agree

 

[lasttimeii]

Thanks i was going to get a 850w psu from xfx i wont need more then that? for i5 2500k oc 4.8ghz @ 1.35v 4x2 gb 1600ghz ram and the cf 7970 oc to 1200/1600. well this vapor x is doing 1200/1600 with out adding volts i'm guessing i will be able to do the same on the next 7970 vapor .

full spec
i5 2500k oc 4.8ghz
asrock extreme 4 gen 3
4x2 corsair vengeance ram
evo 212 cpu cooler push pull
7970 vapor x, cf some day
psu atm 650w CORSAIR Enthusiast Series
1tb hdd
128gb m4 cru ssd

 

[lasttimeii]

Also i can also just leave the tv and ps3 off xD atm there off no need for them i only use the ps3 to watch anime on crunchyroll

 

[bigcyco1]

Thanks i was going to get a 850w psu from xfx i wont need more then that? for i5 2500k oc 4.8ghz @ 1.35v 4x2 gb 1600ghz ram and the cf 7970 oc to 1200/1600. well this vapor x is doing 1200/1600 with out adding volts i'm guessing i will be able to do the same on the next 7970 vapor .

full spec
i5 2500k oc 4.8ghz
asrock extreme 4 gen 3
4x2 corsair vengeance ram
evo 212 cpu cooler push pull
7970 vapor x, cf some day
psu atm 650w CORSAIR Enthusiast Series
1tb hdd
128gb m4 cru ssd

Get the xfx 850w it's better to be safe than sorry i always say.

 

[lasttimeii]

http://www.newegg.com/Product/Product.aspx?Item=N82E16817207017

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139011

http://www.newegg.com/Product/Product.aspx?Item=N82E16817553006

from those 3 psu witch one would be better i have only used corsair be for and never had a problem with them i heard COUGAR psu are one of the best psu and the xfx well allot of people recommended that one not sure why .

 

[bigcyco1]

For a psu I would go with a Seasonic. They make the best psus out there. You won't need a 1200w, but more like 800w. Are you sure you want Crossfire? Theres microstuttering, there are always driver issues and then there are bugs in games that make it not worthwhile if you ask me. You do have three monitors which does warrant dual cards, but from experience, it just doesn't work very well.

Seasonic makes all xfx psu so what is your point?

 

[lasttimeii]

@ jallenlabs well i'm only playing bf3 atm waiting for a game like skyrim online or ff online and atm in bf3 with 1 7970 @ 5760x1080 everything at max 4X AA etc etc some times my fps goes below 25 fps i cant even record i have to use msi afterburner to record and the quality sucks i don't lag in bf3 when i have like 30+fps but yea its better off getting another 7970 + i heard microsturrering aint that bad on cf 7970

 

[bigcyco1]

I would ask BigMack70 about that Micro-Stuttering And GPU Scaling In CrossFire look at his sig he would know if it's a issue or not.

 

[lasttimeii]

A yo @ BigMack70 is microstuttering a big deal when your playing etc

and yea i'm trowing down 200$ on a psu that's the only reason i said the corsair but yea op ikr xD

 

[lasttimeii]

Thanks + i also read its good to have a mobo with good space between the pci slots and people also told me that my mobo have good space to cf