#1 Posted by elko84 (965 posts) -

So I bought a new computer back in February.  I have dual GeForce GTX 285's SLI'd.  It's now the end of September and I see nVidia is already at 480 with their cards.  So I was thinking about upgrading to maybe the 470's.
 
If I go with the 470's I guess I need a 1.1KW power supply based off the Minimum Recommended System Power on nVidia's website.  Apparently I only have a 1KW power supply.  But nVidia's site says the minimum recommended system power for a GTX 285 is 550W.  Well I have two of those in right now.
 
Now the GTX 470's recommend 550w as well.  So is a 1KW power supply enough to handle two 470's SLI'd? 
 
After some digging around the internet I've seen some good things about the 460's.  Saw an article about dual 460's SLI'd out performing a single 480.  Also it sounds like the 460's run cooler than the 470.  If I can get the 470's and use the power supply I have I will.
 
What do you guys think?

#2 Posted by eezo (284 posts) -

There really isn't any use uppgrading, you probly wont notice the diffrence... sure there is a fps diffrence but remember you can't see more than 60ish anyway sooo whats the point?

#3 Posted by Diamond (8634 posts) -
@eezo said:
There really isn't any use uppgrading, you probly wont notice the diffrence...
This, and even if there is a different to notice, you'd be insane to upgrade from SLi dual 285s...  Stop being insane.
 
PLUS the new generation of GPUs is coming out soon, so just hold on to your pants.
#4 Posted by AlisterCat (5399 posts) -

I agree with the posts above. Dont do it.

#5 Posted by ajamafalous (11592 posts) -

I'd say you have no reason to upgrade while you're currently sitting on two 285s.

#6 Posted by elko84 (965 posts) -

I guess the one question I really have is, is a 1KW power supply enough to run 2 470's?

#7 Posted by Phog_of_War (215 posts) -

I wouldnt upgrade myself.  But as far as power needs go, hardware companies overstate the power needs on all of their products.  How much depends on the company but its overstated for sure.
#8 Posted by Xeiphyer (5589 posts) -

Do it and mail me your old ones.

#9 Edited by Geno (6479 posts) -

a) 1K power supply is enough to run 2 470's. A 470 is about 230W at max power consumption; 2x230 (GTX 470 SLI) + 130 (CPU) + 100 (System) + 100 (overhead) = 800W. The highest I've seen a GTX 480 SLI system go is about 950 under Furmark and Prime95 running concurrently (they're about 100W hungrier each at max load than 470), so assuming your 1K supply is of even average quality you should be able to run it easily.  

b) You will get perhaps a 20% perf difference from GTX 285 SLI. Not worth it in my opinion.  
 
c) GTX 460 SLI will outperform a single GTX 480, but will perform under GTX 285 SLI. No point in "upgrading" to something slower. 

#10 Posted by iam3green (14388 posts) -

i would say that the power supply could run them. there is no point in upgrading since you are pretty much have good cards.

#11 Posted by elko84 (965 posts) -
@Geno: Thank you for your answer.  If 460 SLI would be less performance than 285 SLI, would 470 SLI out perform 285 SLI?
#12 Posted by Geno (6479 posts) -
@elko84 said:
" @Geno: Thank you for your answer.  If 460 SLI would be less performance than 285 SLI, would 470 SLI out perform 285 SLI? "
Yes, as mentioned in my previous post you would get about a 20% perf difference. However, I would have to suggest that such a performance difference is probably not worth upgrading for.
#13 Posted by elko84 (965 posts) -
@Geno said:
" @elko84 said:
" @Geno: Thank you for your answer.  If 460 SLI would be less performance than 285 SLI, would 470 SLI out perform 285 SLI? "
Yes, as mentioned in my previous post you would get about a 20% perf difference. However, I would have to suggest that such a performance difference is probably not worth upgrading for. "
Oh ok thank you.  I misunderstood what card the 20% was referring to.
#14 Posted by captain_clayman (3301 posts) -

dont upgrade bro 
those cards are fine 
unless you NEEEEED directx11 (which you dont)