The cooler is wider than the older 3 fan version to cover the wider memory slots on 6 slot X58 MOBOS. However, as long as your board has room, it will work as it clips to the memory locking tabs. DDR2 or DDR3 does not matter. Also, if you are using it with memory other than Dominator, it will work as long as your heatsinks are not too tall.
The cooler is wider than the older 3 fan version to cover the wider memory slots on 6 slot X58 MOBOS. However, as long as your board has room, it will work as it clips to the memory locking tabs. DDR2 or DDR3 does not matter. Also, if you are using it with memory other than Dominator, it will work as long as your heatsinks are not too tall.
XMSYellowbead,
Going the otherway, can you use the older CMXAF1 with new X58 MOBOS? This information should be included in the specifications page on the CORSAIR website.
It's not designed for 6 slot MOBOs which is why we don't include it with tri-channel kits or state such in the specifications. However, it can be used but, it will not cover the modules as well.
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