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Psu good enough for 2 gtx 470s?

Last response: in Systems
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March 31, 2011 4:46:17 PM

I have this power supply
http://www.tigerdirect.com/applications/SearchTools/ite...

Was wondering if it is good enough to run 2 gtx 470s in sli with the i7 2600k

More about : psu good gtx 470s

a b B Homebuilt system
March 31, 2011 5:05:02 PM

If the power supply isn't defective it is sufficient to run two GeForce GTX 470 graphics cards in 2-way SLI mode in an i7-2600K system.
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March 31, 2011 6:41:41 PM

ko888 said:
If the power supply isn't defective it is sufficient to run two GeForce GTX 470 graphics cards in 2-way SLI mode in an i7-2600K system.




I have the psu now and im running a core 2 duo and 1 470 right now thanks for the help
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March 31, 2011 8:41:22 PM

ko888 said:
If the power supply isn't defective it is sufficient to run two GeForce GTX 470 graphics cards in 2-way SLI mode in an i7-2600K system.




my second question is your saying it sufficient enough to run it but is that just barely or just meeting the requirements and is going to demand alot from my psu and will more than likely run hot and at full blast most of the time.
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a b B Homebuilt system
March 31, 2011 10:34:49 PM

nosocomial said:
my second question is your saying it sufficient enough to run it but is that just barely or just meeting the requirements and is going to demand alot from my psu and will more than likely run hot and at full blast most of the time.

My answer was based on:

GeForce GTX 470 - Reference Version
Maximum Graphics Card Power (W) 215 Watts (17.9 Amps) from the +12V rails

Two reference clocked cards in SLI mode would draw a maximum of 430 Watts (35.8 Amps) from the +12V rails

Factor in another 12 Amps from the +12 Volt rails for a reference clocked i7-2600K system under full load giving about 48 Amps total.

The OCZ Fatal1ty Series 750W (OCZ750FTY) has a Maximum Combined Power on the +12 Volt rails of 650 Watts (54 Amps).

It is capable of powering your system, with a little in reserve, if you don't go overboard with the overclocking.

Hardware Secrets' OCZ Fatal1ty 750 W Power Supply Review showed that they could draw up to a maximum of 66 Amps from the combined +12 Volt rails before the power supply's protection circuitry would shut it down.

If you're intent on overclocking the graphics cards and CPU then you would be advised to get an 850 Watt or more power supply unit.

Some additional info that may help:

i7-2600K power consumption from the +12 Volt rails:
@ 4.4 GHz 111 Watts (9.25 Amps)
@ 3.4 GHZ 86 Watts (7.2 Amps)
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April 1, 2011 1:21:58 AM

+1 for ko888's numbers.....

You'll be running at nearly 90% (48/54) of that supplies capability, it's gonna run Hard & Hot... till it dies...


A good rule of thumb is: 650 watts will run almost any SINGLE card..
and 850 watts will run almost any DUAL card setup...

I love the Corsair 850HX supplies because they remain dead silent to almost 600watts...

http://www.corsair.com/power-supplies/modular-psus/prof...

I'm running two (2) systems with this supply on SLI MSI Hawk Talon Attacks @ 900Mhz and the other CrossFire 5870's. Supply never heats up, fan speed never goes above it's idle RPMs....

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April 1, 2011 12:07:45 PM

Best answer selected by nosocomial.
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June 26, 2011 2:48:47 AM

hey i have got my upgraded system and am still rocking the 1 gtx470 as im aware of it is hard to buy a 470 from anywhere even evga stopped selling them on there site heard alot of problems are occuring with them although i have not experienced any problems with my 470. Question is should i go up to 2 560ti or gtx which one is the wiser choice and or should i just find another 470 from a warehouse or go up to 2 560s and how would that fair with my psu i am currently running the gigabyte ud7 b3 with 2600k an corsair h50 with push pull set up 2 120s, 4 sticks of 4gbs gskill 1600mhz with ram cooler, 3 200 mm fans wdcbk sata 6 1 tb, am i going to be really pulling too much from this psu you guys had said 48/54amps how would the 560s look and would it even be necessary to upgrade to the 560s or just grab another 470.

http://www.tigerdirect.com/applications/SearchTools/ite...
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