Revisiting quad-gpus and the Law of Diminishing Returns

Subject: Graphics Cards | May 24, 2011 - 12:44 PM |
Tagged: quad sli, quad crossfire, sli, crossfire, nvidia, amd

With SLI and CrossFire we all hoped to see direct scaling so that a quad GPU setup would be somewhere in the neighbourhood of 4x better than a single GPU.  That has proven to be incorrect, not only is the scaling nowhere near that it has been discovered that in some cases going beyond 2 GPUs can actually reduce performance.  

As the hardware and drivers evolve, it is worth revisiting the scaling performance of both AMD and NVIDIA which is why [H]ard|OCP grabbed two GeForce GTX 590s and two AMD Radeon HD 6990s, both dual GPU cards.  In three of the five games tested they ran into at least one issue, a strike right off the bat.  Read on to see how they rate the value of the two manufacturers based on the performance they saw once they'd resolved the problems.

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"How does NVIDIA's GeForce GTX 590 SLI Quad-GPU compare to AMD's Radeon HD 6990 CrossFireX Quad-GPU? We will find out if these "if-money-didn't-matter dream video card setups" will deliver the gameplay experience we all expect."

Here are some more Graphics Card articles from around the web:

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Source: [H]ard|OCP
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