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GTX TITAN 2-way SLI with PCIE-2.0 (2 x 8x)
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jez_uk1
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Default GTX TITAN 2-way SLI with PCIE-2.0 (2 x 8x) - 02-22-2013, 17:42 | posts: 73 | Location: UK

I'm considering an upgrade for my 3-screen rig, and 2-way TITAN looks very appealing. It would be hooked up to my Z68 mobo which is PCI-E 2.0, in a 2 x 8 lane configuration. Would this be a limiting factor? I'm guessing not because people are running 3-way TITAN in reviews in a 3 x 8x configuration (albeit PCI-E 3.0). I don't currently consider the bus bandwidth to be limiting with the 680 SLI, those GPUs are working as hard as they can without any restrictions. What do you guys think?
   
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ZTylerDurden
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Default 02-22-2013, 17:59 | posts: 4

I'm on the exact same boat. I see some differences between pcie 2 vs 3 on this website for games like witcher 2 and skyrim. I'm heavily considering an ivy bridge now to ensure no bottlenecks.

http://www.hardocp.com/article/2012/...mance_review/3
   
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jez_uk1
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Default 02-22-2013, 18:10 | posts: 73 | Location: UK

Interestingly enough some of the results in 2 and 3-way on the 680 are better with PCI-E 2.0. Where PCI-E 3.0 is better it's only very marginal. I think this reassures me to a certain extent. Certainly I think my Z68 can survive until Haswell arrives.

Last edited by jez_uk1; 02-22-2013 at 18:13.
   
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Agent-A01
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Default 02-22-2013, 18:40 | posts: 6,351 | Location: USA

A titan is 50% faster than a 680... im guessing there will be a decent bottleneck there.
   
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3dPlayer
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Default 02-22-2013, 20:03 | posts: 1,824

Quote:
Originally Posted by agent-a01 View Post
a titan is 50% faster than a 680... Im guessing there will be a decent bottleneck there.
50%?On TPU i see 30% in 1600p.
   
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Gripen90
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Default 02-25-2013, 11:41 | posts: 785 | Location: Denmark

GeForce GTX Titan Performance Summary (2560x1440) vs. GTX 680 = +47% average.
http://www.anandtech.com/show/6774/n...mance-unveiled
   
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Fox2232
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Default 02-25-2013, 12:06 | posts: 1,363 | Location: EU, CZ, Brno

On Titan:
Running three screens in 2-way SLi Will be limited by PCIe 2.0 x8/x8.
I guess up to 10% up performance will be lost compared to PCIe 2.0 x16/x16. and then maybe another 2% from PCIe 3.0 x16.
So, total is about 12% down. 3-Way SLi would see higher impact on Titan.
   
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sykozis
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Default 02-26-2013, 00:04 | posts: 16,325 | Location: US East Coast

Quote:
Originally Posted by jez_uk1 View Post
I'm considering an upgrade for my 3-screen rig, and 2-way TITAN looks very appealing. It would be hooked up to my Z68 mobo which is PCI-E 2.0, in a 2 x 8 lane configuration. Would this be a limiting factor? I'm guessing not because people are running 3-way TITAN in reviews in a 3 x 8x configuration (albeit PCI-E 3.0). I don't currently consider the bus bandwidth to be limiting with the 680 SLI, those GPUs are working as hard as they can without any restrictions. What do you guys think?
PCIe 3.0 x8 has the same bandwidth as PCIe 2.0 x16


   
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---TK---
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Default 02-26-2013, 00:14 | posts: 18,102 | Location: New Jersey, USA

Quote:
Originally Posted by jez_uk1 View Post
I'm considering an upgrade for my 3-screen rig, and 2-way TITAN looks very appealing. It would be hooked up to my Z68 mobo which is PCI-E 2.0, in a 2 x 8 lane configuration. Would this be a limiting factor? I'm guessing not because people are running 3-way TITAN in reviews in a 3 x 8x configuration (albeit PCI-E 3.0). I don't currently consider the bus bandwidth to be limiting with the 680 SLI, those GPUs are working as hard as they can without any restrictions. What do you guys think?
I think 8x pcie 2.0 may be a bottleneck because it is much faster than a 680. pci e 8x 2.0 isnt really a bottleneck for sli 680, its when you go tri and quad sli high end pci e 3.0 really shines
   
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angmar
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Default 02-26-2013, 05:20 | posts: 1,129 | Location: Monmouth County, NJ

If you have enough money to spend 2000 dollars on graphics cards why don't you just spend the measily 130 dollars more and get a pci 3.0 motherboard


.....
   
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(.)(.)
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Default 02-26-2013, 05:40 | posts: 4,691 | Location: Logd n jst 2 change avatar

Quote:
Originally Posted by angmar View Post
If you have enough money to spend 2000 dollars on graphics cards why don't you just spend the measily 130 dollars more and get a pci 3.0 motherboard


.....
Or a sign that says "My girlfriends ugly, but my new rig'll make you jealous."

Sorry, that was uncalled for. I should probably leave now.
   
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yasamoka
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Default 02-26-2013, 06:22 | posts: 3,205 | Location: Lebanon

Quote:
Originally Posted by Agent-A01 View Post
A titan is 50% faster than a 680... im guessing there will be a decent bottleneck there.
Not too related. Depends on what data is being sent to and from the card. Higher FPS does not necessarily mean the card is shifting more data on the PCI-e bus.
   
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