Zombies: Garden Warfare, and Sniper Elite 3), but this is the first game to really do something more with Mantle than reducing the cost of draw calls. That's still a benefit that Civilization: Beyond Earth enjoys, but Firaxis has gone a step further for owners of CrossFire setups and has enabled a custom Split-Frame Rendering (SFR) approach for multiple GPUs instead of the typical Alternate-Frame Rendering (AFR) that most games use with CrossFire and SLI. I like the idea of SFR, as it means adding multiple GPUs won't increase input latency, and in fact from a theoretical perspective SFR could actually reduce latency.
With SFR, the two GPUs could potentially work together to render a single frame in 10ms, cutting input latency in half.Ĭonsider one GPU that takes 20ms to render a frame, and if you have two GPUs each taking 20ms you can get a new frame every 10ms, but buffering means you're still seeing latency of around 20ms (and in worst-case scenarios up to 40ms). That's the potential upside, but of course it can be far more complex to implement SFR (which is why most games choose to go with AFR). I don't have multiple NVIDIA GPUs to test SLI performance, and normally I wouldn't worry too much about CrossFire, but the Mantle SFR support does make for a potentially interesting outcome so I'll at least test the two CrossFire configurations I have on hand (R9 290X and R9 280).
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I should note that the preview release of Civilization: Beyond Earth that we're testing does have a specific limitation that prevents it from using more than two GPUs in fact, if you have more than two GPUs, you apparently need to disable the extra GPUs in the device manager or the game won't launch, though a 0-day patch is in the works to address this. 2440x1440 civilization beyond earth Patch# GeForce GTX 880M ( MSI GT70 Dominator Pro) GeForce GTX 980M ( MSI GT72 Dominator Pro) Test SettingsĪs our testing environments at AnandTech tend to vary a bit by editor, let me again reiterate that I'm not using the same setup as Ryan uses for our GPU reviews for gaming benchmarks like this, I have the following hardware: Gaming Benchmarks Test Systems Anyway, we'll look at CrossFire performance with and without Mantle later on. GeForce GTX 870M ( MSI GS60 Ghost 3K Pro)īasically, my hardware is more of a "mainstream" gaming setup rather than an extreme configuration (e.g. LGA2011), though I did overclock the CPU to 4.1GHz to remove as much of the CPU bottleneck as possible. For anyone running a single GPU – and in most cases even with two GPUs – this sort of build is more than fast enough to keep the GPUs happy. I've also upgraded to a 4K display, Acer's XB280HK G-SYNC panel, which will help tax the faster GPUs. 2440x1440 civilization beyond earth crack#.2440x1440 civilization beyond earth series#.2440x1440 civilization beyond earth Patch#.
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