Gaming CPU Shoot-Out Redux: Multi-GPU Scaling - Metro Last Light

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Metro Last Light

For Metro Last Light I used the be built-in benchmarking tool. The test was run at "Very High" quality, with AF 16X texture filtering, Low motion blur and Normal tessellation. I run these settings on the benchmark run for three loops. I used FRAPS to capture the performance data of the third and last loop.


1080p Widescreen

Metro Last Light - 1080p HD     Metro Last Light - 1080p HD CrossFire   
R7 260X   R9 270X   R9 280X   R9 290R7 260X CFX   R9 270X CFX   R9 280X CFX
MinAvgMax   MinAvgMax   MinAvgMax   MinAvgMax   MinAvgMax   MinAvgMax   MinAvgMax   
AMD FX-95902028.044   2740.465   3454.590   4468.0992944.067   3758.187   4069.8108
AMD FX-93701928.144   2740.466   3454.991   4468.0982843.767   3657.885   3768.7104
AMD FX-83501827.143   2536.960   3453.084   3966.8962841.266   3657.387   3568.2111
AMD FX-63501727.043   2536.960   2952.582   3764.2962135.955   3055.682   2962.9101
AMD FX-43501827.143   2336.159   2349.575   2453.1801837.554   1845.271   2347.274

In single GPU configurations, an R7 290X is needed for the average to stay above 30fps. All of the processors basically allow for a max of 60fps. The R9 290 is needed for an average of 60fps. With the R9 280X and the R9 290, you can see the performance improve steadily with each processor.

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In CrossFire, the FX-4350 holds back performance - especially with a pair of R9 280X cards. Assuming you have the funds to run a pair of those, I would assume a better CPU is already on your radar. There are marked improvements for an FX-8350 in each configuration, with the two faster chips not offering any better (and sometimes worse) performance.

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1080p Eyefinity

Metro Last Light - Eyefinity     Metro Last Light - Eyefinity CrossFire   
R7 260X   R9 270X   R9 280X   R9 290R7 260X CFX   R9 270X CFX   R9 280X CFX
MinAvgMax   MinAvgMax   MinAvgMax   MinAvgMax   MinAvgMax   MinAvgMax   MinAvgMax   
AMD FX-9590711.216   1116.824   1824.936   2330.744918.630   1827.242   2640.063
AMD FX-9370711.116   1116.924   1824.836   2430.8441118.530   1827.142   2639.762
AMD FX-8350711.116   1015.322   1624.136   2230.0431016.827   1725.939   2638.762
AMD FX-6350711.016   915.322   1624.236   2230.3431117.955   1826.340   2638.862
AMD FX-4350811.016   1015.322   1623.835   1830.444816.127   1625.038   1534.853

As we saw in the previous article, Eyefinity performance on a single GPU is absolutely tied to the GPU. Average and max frames are basically in a dead heat across all the configurations, with the only improvements being 1-2 fps. There are some noticeable improvements in minimum fps produced with a better CPU - but only on an R9 290.

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CrossFire is largely the same story - performance is tied to the GPU. The one stand out difference is the FX-4350 with a pair of R9 280X cards. The low end CPU certainly holds back the power of the cards. But on the other hand, the higher end CPUs don't offer any performance gains over each other.

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