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gtx 570 sli vs gtx 660 sli for triple 1680x1050's

post #1 of 19
Thread Starter 
Guys i have a dilemma here, im getting 3x 22 inch 1680x1050 screens, im not sure if i should just get a second 570, or sell mine and get pair of gtx 660's. Looks like 660s will be tad faster but would the difference be worth the hassle? the budget is about $250-300 plus the cost of my 570 if I sell it. According to few benchmarks i saw online the difference isnt big but im just not sure. Now, some of you will say that i need a new psu if i get a 2nd 570 and i do have a new 750w unit, so psu isnt a problem



Opinions?
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post #2 of 19
570s dont have enough vram not to run that kind of resolution. Your psu would handle it fine. My sig rig doesnt even flinch with both 570s clocked at 900/1800/2000 and my cpu at 4.0. In short to do what you want to do with 3 screens yes its worth the hassle.
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post #3 of 19
for multi monitor the GTX 660 is a poor choice . the 192 bit memory bus is too weak for multi monitor resolutions. Get a single HD 7950 OC and overclock it to 1.2 Ghz. the Gigabyte HD 7950 Windforce and Sapphire HD 7950 950 Mhz edition are good choices.

here is a user running the sapphire hd 7950 950 mhz at 1165 Mhz in eyefinity 5760 x 1080

http://www.overclock.net/t/1253670/any-benchmarks-for-single-7970-680s-running-at-5760x1080#post_17572917

With Ultra and no MSAA the user gets 45 fps.
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post #4 of 19
Do you plan on gaming with all 3 of the displays?
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post #5 of 19
Single 7970
 
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post #6 of 19
Thread Starter 
Quote:
Originally Posted by brackberry View Post

Do you plan on gaming with all 3 of the displays?

yes, here are few games i am planning to play:

BF3
Deus EX HR
Skyrim
Dirt 3
Mass Effect 3
Just Cause 2
Batman AC

Also few older titles
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post #7 of 19
Quote:
Originally Posted by ekg84 View Post

yes, here are few games i am planning to play:
BF3
Deus EX HR
Skyrim
Dirt 3
Mass Effect 3
Just Cause 2
Batman AC
Also few older titles

As said above a single HD 7950 OC can play BF3 Ultra without MSAA. At USD 310 its a very good start for multi monitor gaming. sell your GTX 570 . should fetch you USD 160 - 170. spend another 150 bucks and get a single card. Play with it for a while. If you want another HD 7950 save up a bit more and add another card later. HD 7950 (1.1 Ghz) matches a HD 7970 Ghz (1.05 Ghz). Alternatively if you want a Nvidia card get a GTX 670 though at multi monitor the HD 7950 does have the edge.
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post #8 of 19
Thread Starter 
Quote:
Originally Posted by raghu78 View Post

for multi monitor the GTX 660 is a poor choice . the 192 bit memory bus is too weak for multi monitor resolutions. Get a single HD 7950 OC and overclock it to 1.2 Ghz. the Gigabyte HD 7950 Windforce and Sapphire HD 7950 950 Mhz edition are good choices.
here is a user running the sapphire hd 7950 950 mhz at 1165 Mhz in eyefinity 5760 x 1080
http://www.overclock.net/t/1253670/any-benchmarks-for-single-7970-680s-running-at-5760x1080#post_17572917
With Ultra and no MSAA the user gets 45 fps.
Quote:
Originally Posted by deafboy View Post

Single 7970

Guys, i really appreciate your feedback, but how in the world a single 7950/70 even overclocked one can be faster than a pair of gtx 660's in sli when at 1200p 660's are 35-40% faster than a single 7970?

http://www.ocaholic.ch/xoops/html/modules/smartsection/item.php?itemid=844&page=11

According to this graph pair of 660's matches pair of 7950s



Granted all of these benches are done at full hd but it gives an idea, Is there any proof of your words?

Again no offence im just trying to figure this out.
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post #9 of 19
Quote:
Originally Posted by ekg84 View Post

Guys, i really appreciate your feedback, but how in the world a single 7950/70 even overclocked one can be faster than a pair of gtx 660's in sli when at 1200p 660's are 35-40% faster than a single 7970?
http://www.ocaholic.ch/xoops/html/modules/smartsection/item.php?itemid=844&page=11
According to this graph pair of 660's matches pair of 7950s

Granted all of these benches are done at full hd but it gives an idea, Is there any proof of your words?
Again no offence im just trying to figure this out.

you cannot directly correlate performance at 5040 x 1050 from a 1920 x 1200 graph. First of all at 5040 x 1050 you cannot run 4x MSAA because you will run out of VRAM on GTX 660 SLI. you need a minimum of HD 7950 CF for BF3 Ultra 4x MSAA at 5040 x 1050. Without MSAA you can run with a single HD 7950 at 1.2 Ghz.

http://www.hardocp.com/article/2012/03/28/nvidia_kepler_geforce_gtx_680_sli_video_card_review/5

BF3 5760 X 1200 Ultra 4x MSAA

HD 7970 CF (925 Mhz) - avg 45.1 min 34
GTX 680 SLI - avg 40.1 min 14

You can see in the fraps graph the GTX 680 SLI has fps drops below 20 because its running out of VRAM. HD 7950 (1 Ghz) matches HD 7970 (925 Mhz) . HD 7950 CF (1 Ghz) will provide same perf as HD 7970 CF (925 Mhz). Since your resolution is lower you will be able to easily keep avg fps at 55 - 60 with HD 7950 (1.1 Ghz) CF .

also more than benchmarks ask users who own a single HD 7950 OC (1.15 - 1.2 Ghz) driving a multi monitor setup about their experience.
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post #10 of 19
Proof is in the card....

660/670/680 are not well suited for multiple monitors. Beyond 2560x1600 the AMD cards begin to really show their strength.

660 in particular begin to suck due to their ROP and memory bandwidth.
 
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