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SLI Configuration Help

Tags:
  • Not
  • 780
  • Working
  • Asus
  • Nvidia
  • Edition
  • SLI
  • Motherboards
  • Graphics
  • Gtx
  • Performance
  • Configuration
  • Graphics Cards
  • TUF
Last response: in Graphics & Displays
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October 8, 2014 10:49:27 PM

Hello forum,

I'm trying to SLI my spare GTX 780 to my already existing two Gtx 780's. However, when I plug in the third the SLI ribbon only highlights two as SLI capable? My current motherboards is the ASUS Sabertooth TUF edition and I'm using three separate SLI bridges. I connected the bridge as follows;
1 from card 1 to card 2, 1 from card 1 to card 3, 1 from card 2 to card 3. Am I doing anything wrong? The cards are all the same. Not sure if this matters but I have four displays connected to card one.

More about : sli configuration

a c 993 Ĉ ASUS
a b Î Nvidia
a c 1799 V Motherboard
a c 212 U Graphics card
October 8, 2014 10:54:01 PM

Two ribbons only 1 to 2 then the second from 2 to 3 for three way
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October 8, 2014 11:00:31 PM

Just tried that, 1-2, 2-3. The green SLI ribbon is only under Gefore GTX 780 (1) , GTX 780 (2), not (3)

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Best solution

a b Ĉ ASUS
a b Î Nvidia
a b V Motherboard
a c 81 U Graphics card
October 9, 2014 12:39:26 AM

Looking back through some of your older posts, I identified your motherboard as the Z87 Sabertooth. Well, there's your problem; it only supports 2-way SLI. The final x16 slot is wired directly to the chipset, and only runs at x4 mode (PCIe 2.0), while nVidia demand at least x8 for each card used in SLI. Sorry, looks like 2-way SLI is your limit unless you upgrade.
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October 9, 2014 1:01:29 AM

Damn_Rookie said:
Looking back through some of your older posts, I identified your motherboard as the Z87 Sabertooth. Well, there's your problem; it only supports 2-way SLI. The final x16 slot is wired directly to the chipset, and only runs at x4 mode (PCIe 2.0), while nVidia demand at least x8 for each card used in SLI. Sorry, looks like 2-way SLI is your limit unless you upgrade.


^ This Exactly.

Most Z87/97 boards only support 2-way SLI, due to the CPU only having 20(Is it?) PCIe 3 lanes.
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