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Currently have an EVGA GTX 680 SC. Thinking of going SLI. Any warnings?

#1Artemis_FeiPosted 10/10/2013 8:36:28 PM(edited)
I currently have this:

http://www.newegg.com/Product/Product.aspx?Item=N82E16814130769

Thinking of getting this for the price and going SLI:

http://amzn.com/B007ZT2E1C

Seems like it'll fit in my current setup:

http://i.imgur.com/lnrzf.jpg

Anything I need to know beforehand about SLI before biting the bullet? My current EVGA card is OC'd 100 Mhz. If I SLI, in order to reconfigure my overclock, can I just leave the EVGA card OCd to +100 and find a stable OC for the new Asus card?

(I also have a 750W Seasonic Gold PSU, so I think my PSU can handle it)
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#2datopgamerPosted 10/10/2013 10:25:55 PM
Make sure your motherboard supports SLi first.
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I5 3570k @ 4.5ghz, 12 gigs DDR3 memory, Asrock Z77 Extreme 4, 2x EVGA GTX 670 4gb SC sli, Seasonic 750w PSU, Monoprice 1440p monitor
#3phy2jshPosted 10/10/2013 10:43:49 PM
Main warning is its likely your VRAM will become a bottleneck to your performance. Not a massive issue to most, but can be compounded by using a very high resolution or high res texture mods etc. Some newer games (BF4? ) already requiring more than 2gb of VRAM at high settings.
#4MasterDonGeroPosted 10/10/2013 10:54:37 PM
They have to run at the same clocks.
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#5ThePCElitistPosted 10/11/2013 2:24:12 AM
phy2jsh posted...
Main warning is its likely your VRAM will become a bottleneck to your performance. Not a massive issue to most, but can be compounded by using a very high resolution or high res texture mods etc. Some newer games (BF4? ) already requiring more than 2gb of VRAM at high settings.


My SLI 680's still gave me 60-74 fps on ultra at 1080p on BF4 in beta. I still call BS on those requirements.
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#6ShadowGomamonPosted 10/11/2013 2:28:59 AM
1080p isnt high settings. High settings is 1440p or higher. That's where VRAM becomes a major factor.
#7ThePCElitistPosted 10/11/2013 2:30:54 AM
ShadowGomamon posted...
1080p isnt high settings. High settings is 1440p or higher. That's where VRAM becomes a major factor.


Ultra settings
Resolution is maxed for me
Set to "ultra settings" the only thing that matters
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#8SlaynPosted 10/11/2013 2:36:52 AM
MasterDonGero posted...
They have to run at the same clocks.


You sure?
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#9ShadowGomamonPosted 10/11/2013 2:39:05 AM
Slayn posted...
MasterDonGero posted...
They have to run at the same clocks.


You sure?


I was always led to believe both cards will run at whatever the primary slot is running at. Which would mean if your primary card is OC'd heavily, your second might end up being unstable.
#10ShubPosted 10/11/2013 3:50:51 AM
They never had to run at the same clocks, historically the faster card would just have to go slower to align with the slower card, and I've been reading that that's no longer even a requirement with nVidia cards.
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