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GTX480 3-way SLI :D

Last response: in Graphics & Displays
April 25, 2010 5:07:58 PM

Power is going to be the main issue. My old and trusted Giga-EZ 1000W should be enough for GTX 480 in SLI, but to accomodate 3 of them?
I'd go with a Antec 1200W unit cz what I need a SERIOUS power supply for that...

I'm more interested in is triplehead benches though and the scaling on 3-Way SLI is better with a highly overclocked Core i7,4800MHz for a start ;) 

More about : gtx480 sli

a b Î Nvidia
a b ) Power supply
April 25, 2010 5:17:26 PM

So what's the point of posting it ? do you want to post some benchmarks or just saying you are building a rig with 3 GTX 480s ?
a b ) Power supply
April 25, 2010 5:17:57 PM

Is there a question here or are you just showing off how much money you have?
Related resources
April 25, 2010 5:37:46 PM

here is the question,
a 1200w PSU will be enough to handle that rig?two of them ?
a bigger one?
a b ) Power supply
April 25, 2010 7:50:47 PM

Don't listen to them, they are going off of mis-information.

Your OC will be limited, but Tri-SLI GTX 470s or 480s is perfectly doable when it comes to heat.

You will get away with a GOOD 1KW PSU with 3 GTX 470s, but you will need a little higher if you plan to use 3 GTX 480s and overclock them.

I recommend 3 GTX 470s instead of 3 GTX 480s because I have seen people get them to ~800MHz core in tri-SLI with 80-100% fans so it is perfectly doable. The GTX 470 is only about 6-7% slower clock for clock than the GTX 480 unless you are playing at resolutions over 1920x1200 with heavy AA.

Either way you will need a new PSU, because your 1KW PSU is of questionable quality.

I recommend:

A good price and a good PSU. Might as well get it, even if you end up with 3 GTX 470s
a b Î Nvidia
a b ) Power supply
April 25, 2010 9:55:35 PM

Guys please stay on topic,the OP is asking about an adequate PSU for a 3-way SLI configuration not for overheating problems etc
April 26, 2010 12:53:04 AM

Nice E-Penis there.

You made this thread so we couls stroke it, and there you go.

Now On Topic: You need a a 750 for 1 1kw for 2, and a 1.2kw for 3, and for 4 you need a 1.5kw.
April 26, 2010 1:15:24 AM

builderbobftw said:
Now On Topic: You need a a 750 for 1 1kw for 2, and a 1.2kw for 3, and for 4 you need a 1.5kw.

is there even a PSU that supplies 1.5Kw for the desktop?
April 26, 2010 6:54:16 PM

^ I beg to differ.

not If yyou want to OC the CPU, and the cards. You'll notice that this is printed on the 1500W: "support latest NVIDIA GTX 480 3way SLI certified"

I doubt that a 1250W can handle 4 GTX 480s with an OC, and a i7-930 at 4.0, at wich it pulls 250W+, and the nessary fans to keep those cards cool.
a b ) Power supply
April 26, 2010 7:38:26 PM

Yeah a VERY high end 1200w should do the job fine.
April 26, 2010 8:15:06 PM

Even with a OC on all 4 cards? and a 930 at 4.0+?
a b Î Nvidia
April 26, 2010 8:19:30 PM

Yes in part because the cards can never be driven to their 'theoretical maximum' its not going to be linear with the FPS scaling but 'sorta' similar. This was proven with Hocp's sound and watt test. GTX SLI drew less than 600 in sli , or less tha 200 for the second card.

a b ) Power supply
April 26, 2010 11:03:23 PM

builderbobftw said:
Even with a OC on all 4 cards? and a 930 at 4.0+?

Without cranking the voltage too much, something impossible when you have 4 of those hot beasts like that, yes.

I do kind of agree with you though, any system that can't be powered by a 1KW PSU should be run by multiple PSUs, there are many cases that allow for this like the HAF 932.

In my opinion, 2 good SINGLE rail 750w PSUs would be the best option, and they can be had for under $300 while giving the best stability, versatility, and efficiency.
April 26, 2010 11:27:11 PM

^ On Liquid, You cna crank the volts.

And realy? Multiple PSUs? I didn't know that was possible!!!!!!!

So If I want to put a 4870x2 into my build, I could just do a mod to showhorn another 300W PSU in there?
a b ) Power supply
April 26, 2010 11:55:44 PM

Well if you have liquid, that changes everything. You will need at least a high end pump and a triple and dual radiator, or a quad radiator to cool those. A high end pump with a good head will draw 100w pretty easily.

As for dual PSUs, sure its pretty common actually. All you need is an adapter to attach to the secondary PSU's 24pin motherboard connector so that it will trip on with the other PSU and think it is plugged into a motherboard, you can solder some wires too but this is easier without destroying any resale value of the PSU.

Some cases that support dual PSUs, to my knowledge:
CM HAF 932
CM Stacker 810
CM ATC 840
Antec P190
Silverstone TJ07 (my case)
Lian Li PC-A70(71)
Lian Li PC-A7010(7110)
Lian Li PC-A77
Lian Li PC-A70F(71F)
Lian Li PC-P80

And likely many more. You can also mod your case.
April 27, 2010 12:08:10 AM

What about aiding one of those Crosair 950w as a second PSU?
There cheap good reliable, etc.
April 27, 2010 12:27:32 AM


My new build will praobly be a TX-950/Haf 932 based build