The performance gains are much bigger than i expected but i triple checked the results and there is well under 1fps difference between most runs at the same settings so if somebody else would like to give this a go to confirm or disprove my results it would be interesting
Arma 3 stratis 1600-2133 15.369 % increase
Arma 3 altis 1600-2133 11.477 % increase
Test System
2600k
ASUS Z77 MAXIMUS V GENE
2X4G SAMSUNG 2133 (10-10-10-24-1T used for all tests)
Two 7970@1050\5600MHz crossfire is enabled not that it makes any difference at 1080p
2TB 7200RPM with OCZ Synapse 128G Cache
Seasonic 1000W Platinum
win7 64
cat 13.10 beta2
Tests were run at high detail 1920x1080 unlike last time on the alpha http://forums.bistudio.com/showthread.php?153524-CPU-VS-RAM-Performance-amp-CPU-Threading-Benchmarked
with 16g 2400 c10 ram being within $20-50 of 1600 c10 ram i think this is useful information for those considering replacing there pc and goes against the results of other ram performance tests in games due to most other games being gpu bottlnecked
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Late edit with some new tests
i have run some new tests on ram timings but there is obviously some inconsistency with the tests since i only bothered to run them all once with 1600 8-8-8 performing the same as 9-9-9 in one test and 9-9-9 performing the same as 10-10-10 in another this is just a hickup
one 7970 is now dead so im back to a single gpu for these tests
minimum fps in altis was to inconsistent to bother including
current ram prices in au
2x4g
1333 9-9-9 $93
1600 11-11-11 $89
1600 9-9-9 $103
1600 8-8-8 $109
1866 9-10-9 $105
2133 11-11-11 $102
2133 9-11-10 $115
2400 10-12-12 $125
2x8g
1333 9-9-9 $152
1600 11-11-11 $175
1600 9-9-9 $203
1866 10-11-10 $199
1866 9-10-9 $205
2133 11-11-11 $205
2133 9-11-11 $225
2400 10-12-12 $229