With a little trick you can get up to 45 percent more performance out of the single-player mode of Call of Duty: Modern Warfare. At least if you use AMD's Crossfire or a Radeon X2 card like the Radeon HD 3870 X2 or the future HD 4870 X2.
Radeon HD 4870 X2: Full throttle with the right profile. [Source: view picture gallery]
To receive the benefit you just need to rename the single-player launch file "iw3sp.exe” to "iw3mp.exe”, which is the name of the multiplayer launch file of
Call of Duty 4 - make sure to create a backup of the original multi player file first.
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.
| "Performance boost by renaming the "".exe"" file of Call of Duty 4" |
4xAA/16xAF |
8xAA/16xAF |
| 1.680x1.050 |
34,80% |
45,20% |
| 1.920x1.200 |
38,40% |
40,70% |
| 2.560x1.600 |
42,50% |
34,50% |
Actually we cannot think of any reason why AMD doesn't activate the Crossfire performance boost for the single-player. Up to now we haven't received an answer to our inquiry about this matter from the Canadian GPU specialists.
Radeon HD 4870 X2 - Call of Duty 4 at 1.680x1.050 with 4x FSAA/16x AF; in the benchmark: HD4870, HD4870 X2 with and without renamed exe file. [Source: view picture gallery]
Radeon HD 4870 X2 - Call of Duty 4 at 1.680x1.050 with 8x FSAA/16x AF; in the benchmark: HD4870, HD4870 X2 with and without renamed exe file. [Source: view picture gallery]
Radeon HD 4870 X2 - Call of Duty 4 at 1.920x1.200 with 4x FSAA/16x AF; in the benchmark: HD4870, HD4870 X2 with and without renamed exe file. [Source: view picture gallery]
Radeon HD 4870 X2 - Call of Duty 4 at 1.920x1.200 with 8x FSAA/16x AF; in the benchmark: HD4870, HD4870 X2 with and without renamed exe file. [Source: view picture gallery]
Radeon HD 4870 X2 - Call of Duty 4 at 2.560x1.600 with 4x FSAA/16x AF in the benchmark: HD4870, HD4870 X2 with and without renamed exe file. [Source: view picture gallery]
Radeon HD 4870 X2 - Call of Duty 4 at 2.560x1.600 with 8x FSAA/16x AF; in the benchmark: HD4870, HD4870 X2 with and without renamed exe file. [Source: view picture gallery]
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