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Most graphics card's in SLI/Crossfire

4 is the theoretical maximum, but for this you need:
- 4 Graphics cards with the correct number of crossfire/SLI connections (for example, the new 960 can only be run in 2 way SLI since it doesn't have the physical connections for 3 or 4 way)
- 4 PCI-E slots with 16x physical dimensions, and at least 8x electrical specs on your motherboard. Spacing is also key, since most GPUs occupy 2 expansion slots.
- A capable CPU - Mainstream CPUs do not support 4 way SLI/Crossfire without additional chips on the motherboard
- A power supply with adequate connectors

And of course a big case with plenty of airflow.
 
ghost.florian said:
4 is the theoretical maximum, but for this you need:
- 4 Graphics cards with the correct number of crossfire/SLI connections (for example, the new 960 can only be run in 2 way SLI since it doesn't have the physical connections for 3 or 4 way)
- 4 PCI-E slots with 16x physical dimensions, and at least 8x electrical specs on your motherboard. Spacing is also key, since most GPUs occupy 2 expansion slots.
- A capable CPU - Mainstream CPUs do not support 4 way SLI/Crossfire without additional chips on the motherboard
- A power supply with adequate connectors

And of course a big case with plenty of airflow.
Click to expand...

You mean this.:)
PQPwKHR.jpg
 
ghost.florian said:
4 is the theoretical maximum, but for this you need:
- 4 Graphics cards with the correct number of crossfire/SLI connections (for example, the new 960 can only be run in 2 way SLI since it doesn't have the physical connections for 3 or 4 way)
- 4 PCI-E slots with 16x physical dimensions, and at least 8x electrical specs on your motherboard. Spacing is also key, since most GPUs occupy 2 expansion slots.
- A capable CPU - Mainstream CPUs do not support 4 way SLI/Crossfire without additional chips on the motherboard
- A power supply with adequate connectors

And of course a big case with plenty of airflow.
Click to expand...

At least with the newer AMD cards you don't need to worry about the crossfire bridge.

Hoesntly, is there even that much gains from 3x these days?
 
4x is best of course, but more than 3x leads to diminishing returns.

e.g. If you get 30 fps with 1 GPU, 60 fps with 2x GPU's and 90 fps with 3x GPU's, don't expect 120 fps with 4x GPU's
 
VincentHanna said:
4x is best of course, but more than 3x leads to diminishing returns.

e.g. If you get 30 fps with 1 GPU, 60 fps with 2x GPU's and 90 fps with 3x GPU's, don't expect 120 fps with 4x GPU's
Click to expand...

You can get 120 fps with 4x GPUs but to do this you need to avoid a CPU bottleneck. The best way to do this is to run at high resolutions.

Often tech review sites (lol) when they get a tri or quad setup to test will still use the same test bed they would for a single GPU, this almost always leads to disaster with the results.:D
 
VincentHanna said:
Ah, I thought it wasn't linear.

Much as I would like 4, I can't justify the spend when three is enough for decent 4k performance in everything I've played.
Click to expand...

Sometimes it is not linear as the drivers are poor or non existent but providing they are ok and you are not hitting a CPU bottleneck it works well.

For gaming at 4K three cards is fine, I often only use a single card for the games I play as I am often too lazy to enable CF or SLI.:)
 
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