No, 4. Because they're being used for compute purposes you don't need SLI bridges or whatnot.
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AMD’s Dual ‘Fiji XT’ Flagship Spotted in Shipping Manifest – Launching Soon
- Thread starter Gregster
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No, 4. Because they're being used for compute purposes you don't need SLI bridges or whatnot.
Man of Honour
No 2, because they are triple slot cards, one of the pitfalls that made them poor cards.
Man of Honour
Crossfire will only do 4 way max.
An 18 core Xeon is probably one of the very worst CPUs you could use with a multi GPU setup due to it's low clockspeed. What a 4 way setup needs for maximum performance is a 6 or 8 core Haswell-E CPU and as high a clockspeed as possible to avoid bottlenecks.
IIRC EVGA did a dual slot version.
Man of Honour
Nope
NVidia did a dual slot version that was not released as it was total animal waste and needed a better cooler.
Soldato
Was his 5960X clocked to any significant degree?
Man of Honour
I am sat here typing this on a PC with 4 TXs and a 5960X and can quite honestly say Jayz2cents is talking out of his waste outlet.
You can bottleneck most single cards if you want to let alone 4.
You can avoid bottlenecks with 4 cards most of the time by using 2160p with max settings.
Using 4 TXs @2160p is about the same as using a single GTX 980 Ti, TitanX or Fury X @1080p. There are plenty of people who use a single card @1080p.
he said you could see the bottleneck at 1080p because the results were not much faster than 1440p
I guess it makes sense that it would become a problem at higher framerates
I always thought that there were also diminishing returns for each card you add at every resolution independent of the cpu though, which means 2 card is the optimum
Just remembered he did also mention that he prefers to run games on a 1080p high refresh rate monitor which might explain why he thinks
adding the 4th card wouldn't be worth it
I guess it makes sense that it would become a problem at higher framerates
I always thought that there were also diminishing returns for each card you add at every resolution independent of the cpu though, which means 2 card is the optimum
Just remembered he did also mention that he prefers to run games on a 1080p high refresh rate monitor which might explain why he thinks
adding the 4th card wouldn't be worth it
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Man of Honour
Adding a 4th card is very worthwhile @2160p as it is much the same as using a single card @1080p.
Sometimes the drivers can take time to arrive for 4 way setups in games but for major titles they usually do.
If you could see how well 4 way SLI Titans runs Shadow of Mordor @2160p maxed you would see the benefits very quickly. The TitanXs absolutely own the game.
Having said that if people wish to look backwards at very old games then you will get bottlenecks.
The bottom line is it is better to have too much GPU grunt than not enough. 4 TitanXs will give you just enough GPU grunt to run any modern game any way you want to @2160p.
8-way is possible in Linux (if you believe AMD).
Associate
How do you even do 8 way crossfire, or were they teasing for the Fury X2?
Associate
Was more questioning the PCI layout 
Caporegime
Was more questioning the PCI layout
Buy a board with eight PCI-E slots and maybe use risers for some, not really that hard.
Associate
Oh right, for some reason I thought crossfire was 8 lanes minimum too. 
Caporegime
No. 4X
Heres a board with 10 8X slots - http://www.supermicro.co.uk/products/motherboard/Xeon/C600/X10DRX.cfm
Heres a board with 10 8X slots - http://www.supermicro.co.uk/products/motherboard/Xeon/C600/X10DRX.cfm