HR-07 Duo a much better improvement on this particular issue. Now you can install as many memory modules as you want and still be able to install HR-07 Duo which still incorporates the two-heatpipe design but having one set of radiator fins instead of two as in the original HR-07 for that fine balance between performance and space saving. HR-07 Duo having one less set of radiator fins will of course not be as good as the original HR-07 but it will have more than enough cooling power to handle the heat from your memory chips. If you want the ultimate cooling power, we would definitely recommend HR-07. But if your system requires a great deal of memories, HR-07 Duo is your best bet.you won"t have to worry about space. Easy installation, no tools needed, able to install 4 DIMM, high cooling performance, and extends the life expectancy of your memory module. What more could you ask for?