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Go for a 3rd 580gtx now? - Page 2

post #11 of 25
Thread Starter 
Hey, thanks for the answers. I don't know if the vram gets maxed honestly, but the fps sometimes dips to 60s (with everything on ultra and 2x aa 1080p). Maybe it's better to stick with these 2 and live with 60 - 100 fps because 1.5gb might not be future proof. On the other hand, will we really see even more graphic intensive games coming in the next 2 years that really will require the vram? considering the new consoles are barely even in production.
the reason i want 120hz so badly is because my eyes are really sensitive to it, i can immediately see the difference between, lets say 120fps and 90fps. 120hz also makes the game look much better imo. Indeed capping it at 60fps is still pretty nice but then there is the problem with input lag.


btw i've seen on another forum that a 2600k at at least 4.8ghz is required to completely remove bottleneck with 2 580s in bf3.
Edited by pauly94 - 2/1/12 at 1:33pm
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post #12 of 25
Quote:
Originally Posted by pauly94 View Post

Hey, thanks for the answers. I don't know if the vram gets maxed honestly, but the fps sometimes dips to 60s (with everything on ultra and 2x aa 1080p). Maybe it's better to stick with these 2 and live with 60 - 100 fps because 1.5gb might not be future proof. On the other hand, will we really see even more graphic intensive games coming in the next 2 years that really will require the vram? considering the new consoles are barely even in production.
the reason i want 120hz so badly is because my eyes are really sensitive to it, i can immediately see the difference between, lets say 120fps and 90fps. 120hz also makes the game look much better imo. Indeed capping it at 60fps is still pretty nice but then there is the problem with input lag.
btw i've seen on another forum that a 2600k at at least 4.8ghz is required to completely remove bottleneck with 2 580s in bf3.

Definitely not true. A 2600k at stock is enough to remove the bottleneck. I was horridly bottlenecked with two 570's and an 1100t at 4ghz, then I moved to sandy bridge and it made a believer out of me. Felt better in game, all around. I never thought I could pick up a real world "difference" between processors before (maybe because I was a closet intel fan and was in denial) but I really did.
post #13 of 25
Thread Starter 
Well I don't know, might not be true, but the guy basically tested his 2600k at different clocks. He showed with screenshots that to really get 99% all the time on both cards you want at least 4.4ghz+. With overclocked 580s he needed 4.8ghz.
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post #14 of 25
I'd guess it's the vram size that's bottle necking you, not the GPU power.
Also, in order to fully take advantage of the high refresh rate offered by your monitor, you need to put a cap on your FPS. Low FPS (<60) is bad, constantly jumping FPS is worse.

If you can't play with lower settings, are unwilling to buy new 580s with 3GB of vram, cap your FPS at 60 or 75, I'm giving you a 90% guarantee you'll be very happy.
    
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post #15 of 25
as of right now 2 cards is the sweet spot
until scaling gets better with 3 cards or more it's a waste for games
maybe ditch your 1.5GB's and get 3GB 580's
my choice would be the msi lightening xtreme
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post #16 of 25

Let me comment on one aspect that has not been mentioned yet:- OP's Asus P6T Deluxe V2.

 

It does have three PCIEx16 slots (blue ,white and black) and can run them at x16/x8/x8.  For three cards to sit in these 3 slots, there will not be a spatial problem with the top blue slot and the bottom black slot (as the HAF-X has nine expansion slots).

However, the card sitting in the middle white slot has to be a single slot card. And, air cooled single slot GTX580 just does not exist.

This means, this card has to be watercooled. Looking at OP's sig rig, I suspect there is no existing watercooling system. So, this will involve a complete watercooling system for this middle card.  This is an important point of consideration.

 

Alternatively, the 3rd GTX580 is bought now but just sits in the closet to wait for an X79 motherboard to arrive next month.

If this is the route, perhaps do not get the 3rd GTX580 now and wait for another month.  At least, the price might drop down a little.

 

(If it were me, I would spend the money to upgrade the monitor from the current 24'' BenQ XL2410T to a 27'' 120Hz instead of upgrading from 2-way SLI to 3-way SLI GTX580)

 

post #17 of 25
Quote:
Originally Posted by Necrodox View Post

I recommend against the third 580, unless you really want to spend the money. The performance gain isn't worth the cost (in my opinion).

Pretty much, honestly wait and save your money thumb.gif
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post #18 of 25
Thread Starter 
Quote:
Let me comment on one aspect that has not been mentioned yet:- OP's Asus P6T Deluxe V2.

It does have three PCIEx16 slots (blue ,white and black) and can run them at x16/x8/x8. For three cards to sit in these 3 slots, there will not be a spatial problem with the top blue slot and the bottom black slot (as the HAF-X has nine expansion slots).
However, the card sitting in the middle white slot has to be a single slot card. And, air cooled single slot GTX580 just does not exist.
This means, this card has to be watercooled. Looking at OP's sig rig, I suspect there is no existing watercooling system. So, this will involve a complete watercooling system for this middle card. This is an important point of consideration.

Alternatively, the 3rd GTX580 is bought now but just sits in the closet to wait for an X79 motherboard to arrive next month.
If this is the route, perhaps do not get the 3rd GTX580 now and wait for another month. At least, the price might drop down a little.

(If it were me, I would spend the money to upgrade the monitor from the current 24'' BenQ XL2410T to a 27'' 120Hz instead of upgrading from 2-way SLI to 3-way SLI GTX580)

yea I've also been thinking about upgrading my screen instead, I'm looking at this one: Samsung TFT 27'' S27A750D LED 120Hz. is that a significantly better one than the one i have (color wise)? And what about going for the 7990 with 6gb when that comes out?
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post #19 of 25
Quote:
Originally Posted by pauly94 View Post

Goodday overclockers,
I am about to upgrade to x79 in a month or so because my current processor struggles to keep up in some games. Im also thinking of getting a 3rd 1.5gb 580 because it's nice to have a steady 120 fps in games like bf3(because I have a 120hz screen). Do you guys think it is a good choice to get another 580 or should i wait for the Kepler high-end cards? or maybe AMD's 8xxx?

Highly doubt your cpu can't keep up with games. wait for ivy bridge.

Don't get a 3rd GTX580. wait till kelpar. your 3rd card if you did get it would be nothing but an e-peen enlargement. in games your performance - price ratio isn't worth the upgrade.

You don't need 120FPS to take advantage of a 120Hz screen (please don't start a flame war). The human eye can't see more than 80FPS in games. even at 120Hz where the image is basically doubled.

wait for kelpar and ivy bridge. I would kill for a setup like yours lol, your cpu isn great and SLI'ed 580's is excellent.
post #20 of 25
Quote:
Originally Posted by pauly94 View Post


btw i've seen on another forum that a 2600k at at least 4.8ghz is required to completely remove bottleneck with 2 580s in bf3.


Easiest way to find out is start playing BF3 and watch the usage of the GPU's, you can use an OSD (On Screen Display) on programs like MSI Afterburner and have the GPU % used, as well as VRAM % used show up on screen when your playing

 

If you see high % on both GPU's then you dont have a bottleneck. Also if you notice your relatively high in VRAM used, then you know another 580 will probably max out the 1.5GB

 

But I am going to say that a 950 @ 4.2 is more than enough for 2 580's...

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