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Is my psu big enough?

post #1 of 10
Thread Starter 
Right now I have a Radeon 5830, AMD 960T @4ghz 1.425 vcore, 1 7200 rpm HD, 1 disk drive and 4 case fans. I have a Corsair Builder Series 430 watt psu (28 amps on single 12 volt rail). I want to know if it would be possible to crossfire another 5830 on my power supply. Thanks!
(I also heard that when crossfired each card uses less power than its max TDP due to under-utilization. I don't know if this is true and would like to hear a professional's answer:p)
post #2 of 10
Seems perfectly fine, not sure about how much a 5830 needs in terms of amps but It would not be a lot.

Although with an overclocked cpu it could be close.
Edited by icehotshot - 1/24/12 at 4:52pm
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post #3 of 10
Thread Starter 
When stressed they need about 150 watts. Not quite sure but I think that works out o 13ish amps.
post #4 of 10
Hmm, well with your cpu overclocked you would be on the verge of your 430w.....

according to this article http://www.tweaktown.com/reviews/3170/sapphire_radeon_hd_5830_video_card_in_crossfire/index14.html

So you may need to upgrade your psu to a 500w.
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post #5 of 10
Thread Starter 
Thanks!! I have one more question so bear with me. Does 3d mark put both the graphics cards and the cpu under load, or just the graphics?
post #6 of 10
Quote:
Originally Posted by corporalcomet12 View Post

Right now I have a Radeon 5830, AMD 960T @4ghz 1.425 vcore, 1 7200 rpm HD, 1 disk drive and 4 case fans. I have a Corsair Builder Series 430 watt psu (28 amps on single 12 volt rail). I want to know if it would be possible to crossfire another 5830 on my power supply. Thanks!
(I also heard that when crossfired each card uses less power than its max TDP due to under-utilization. I don't know if this is true and would like to hear a professional's answer:p)



 

28 A = 336 watt for the +12V

 

Crossfire = not enough. 

 

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post #7 of 10
Thread Starter 
Not to be annoying but how many watts would my 960t use when overclocked?
post #8 of 10
Thread Starter 
Ha!! Found an approxomation.smile.gif
post #9 of 10

 

Quote:
Originally Posted by corporalcomet12 View Post

Not to be annoying but how many watts would my 960t use when overclocked?


Let's just say around 150w on full load for the CPU + one 5830 with 175w = 325w without the fans, HDD and such.

 

At stock clocks, a single 5850 will draw approx 175w depends on what applications you run.

 

To be on the safe side, and if budget is of concern, get a very good quality minimum 550 or 650w PSU to crossfire.

 

http://extreme.outervision.com/psucalculatorlite.jsp

 

 

 

I don't make specific PSU brands recommendation. It will like shilling for certain company.


Edited by Ken1649 - 1/24/12 at 5:39pm
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120GB x 4 RAID0 Raptor 300GB x 2 RAID0 CPU-370 CPU-370 
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post #10 of 10

I don't think you can crossfire with your PSU. You only have 1 PCI-E Connector... unless you add extension via 4 pin molex but it is not recommended.

 

http://www.corsair.com/power-supply-units/builder-series/builder-series-cx430-v2-80plus-certified-power-supply.html

 

*edit* i just realized this is a 3 weeks old thread.


Edited by djriful - 2/16/12 at 7:54pm
 
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≡ Snowbaru ≡
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