Crossfire X performance boost in Call of Duty 4: PCGH tuning tip confirmed by AMD
On Monday we reported that it is possible to increase the performance of Crossfire systems in Call of Duty: Modern Warfare by renaming the single-player exe file. AMD confirmed our tip: Currently they are looking for possible fixes.
According to AMD the Crossfire X profile for the single-player mode of CoD 4 misses some optimizations, which are available for the multiplayer mode. This could cause situations where the scaling would not work in the single-player mode. It seems like the PCGH benchmark sequence is one of those scenes and therefore we renamed the exe file to receive additional results for our HD 4870 X2 review.
Currently AMD investigates, which of the missing optimizations can be integrated into the single-player mode profile. At the moment AMD cannot say which version of the Catalyst driver will be the first one to have the enhanced profile, since quality assurance is most important. Of course the optimizations must not cause any other problems with the game.
In PCGH Tuning: Crossfire X performance boost for Call of Duty 4 we told you, how to receive up to 45 percent more performance in the single-player mode of Call of Duty: Modern Warfare, when using Crossfire.
All you need to do to get the improved performance is to rename the launch file of the Call of Duty single-player mode from “iw3sp.exe” to “iw3mp.exe” (make sure to backup the original multiplayer launch file).
This enables the Crossfire AFR mode - in our benchmark level this is the case at least, since without it the Radeon HD 4870 X2 isn't much faster than a single GPU version. With this trick you can, depending on the settings and played level, receive up to 45 percent more fps in Call of Duty 4.
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